From 74d5715d00f70b3b4a712ae1c5fa4364717436ea Mon Sep 17 00:00:00 2001 From: Waddah Date: Thu, 15 Oct 2020 20:37:32 +0300 Subject: [PATCH 1/5] add a solution for Project Euler problem #005 --- Project-Euler/Problem005.js | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) create mode 100644 Project-Euler/Problem005.js diff --git a/Project-Euler/Problem005.js b/Project-Euler/Problem005.js new file mode 100644 index 0000000000..0ba30669a5 --- /dev/null +++ b/Project-Euler/Problem005.js @@ -0,0 +1,22 @@ +/* +Smallest multiple + +2520 is the smallest number that can be divided by each of the numbers from 1 to 10 without any remainder. +What is the smallest positive number that is evenly divisible by all of the numbers from 1 to 20? +*/ + +const findSmallestMultiple = () => { + const divisors = [20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2] + let num = 21 + let result + + while (!result) { + const isDivisibleByAll = divisors.every((divisor) => num % divisor === 0) + if (isDivisibleByAll) result = num + else num++ + } + + return result +} + +console.log(findSmallestMultiple()) From 03d3720c260072436d9d128cbf1cec7a99fd7abb Mon Sep 17 00:00:00 2001 From: Waddah Date: Thu, 15 Oct 2020 21:33:16 +0300 Subject: [PATCH 2/5] add a solution for Project Euler problem #006 --- Project-Euler/Problem006.js | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) create mode 100644 Project-Euler/Problem006.js diff --git a/Project-Euler/Problem006.js b/Project-Euler/Problem006.js new file mode 100644 index 0000000000..181ed6be5c --- /dev/null +++ b/Project-Euler/Problem006.js @@ -0,0 +1,24 @@ +/* +Sum square difference +The sum of the squares of the first ten natural numbers is 385, + +The square of the sum of the first ten natural numbers is 3025, + +Hence the difference between the sum of the squares of the first ten natural numbers and the square of the sum is 3025 - 385 = 2640. + +Find the difference between the sum of the squares of the first one hundred natural numbers and the square of the sum. +*/ + +const findSumSquareDifference = (elementsCount) => { + const naturalNumbers = Array(elementsCount).fill().map((_, i) => i + 1) + + let sumOfSquares = 0 + naturalNumbers.forEach(number => { sumOfSquares += Math.pow(number, 2) }) + + const sumOfNumbers = naturalNumbers.reduce((prev, current) => { current += prev }, 0) + const squareOfSums = Math.pow(sumOfNumbers, 2) + + return squareOfSums - sumOfSquares +} + +console.log(findSumSquareDifference(20)) From b26baef31ed8956098fe3d65bf0636895fb571b4 Mon Sep 17 00:00:00 2001 From: Waddah Date: Sat, 17 Oct 2020 23:11:26 +0300 Subject: [PATCH 3/5] remove files to merge from seprate brnches --- Project-Euler/Problem005.js | 22 ---------------------- Project-Euler/Problem006.js | 24 ------------------------ 2 files changed, 46 deletions(-) delete mode 100644 Project-Euler/Problem005.js delete mode 100644 Project-Euler/Problem006.js diff --git a/Project-Euler/Problem005.js b/Project-Euler/Problem005.js deleted file mode 100644 index 0ba30669a5..0000000000 --- a/Project-Euler/Problem005.js +++ /dev/null @@ -1,22 +0,0 @@ -/* -Smallest multiple - -2520 is the smallest number that can be divided by each of the numbers from 1 to 10 without any remainder. -What is the smallest positive number that is evenly divisible by all of the numbers from 1 to 20? -*/ - -const findSmallestMultiple = () => { - const divisors = [20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2] - let num = 21 - let result - - while (!result) { - const isDivisibleByAll = divisors.every((divisor) => num % divisor === 0) - if (isDivisibleByAll) result = num - else num++ - } - - return result -} - -console.log(findSmallestMultiple()) diff --git a/Project-Euler/Problem006.js b/Project-Euler/Problem006.js deleted file mode 100644 index 181ed6be5c..0000000000 --- a/Project-Euler/Problem006.js +++ /dev/null @@ -1,24 +0,0 @@ -/* -Sum square difference -The sum of the squares of the first ten natural numbers is 385, - -The square of the sum of the first ten natural numbers is 3025, - -Hence the difference between the sum of the squares of the first ten natural numbers and the square of the sum is 3025 - 385 = 2640. - -Find the difference between the sum of the squares of the first one hundred natural numbers and the square of the sum. -*/ - -const findSumSquareDifference = (elementsCount) => { - const naturalNumbers = Array(elementsCount).fill().map((_, i) => i + 1) - - let sumOfSquares = 0 - naturalNumbers.forEach(number => { sumOfSquares += Math.pow(number, 2) }) - - const sumOfNumbers = naturalNumbers.reduce((prev, current) => { current += prev }, 0) - const squareOfSums = Math.pow(sumOfNumbers, 2) - - return squareOfSums - sumOfSquares -} - -console.log(findSumSquareDifference(20)) From 5e5543f996bb1a916dde529ad1b4953d2585b906 Mon Sep 17 00:00:00 2001 From: Waddah Date: Sat, 17 Oct 2020 23:31:39 +0300 Subject: [PATCH 4/5] add solution for Project Euler 013 --- Project-Euler/Problem013.js | 116 ++++++++++++++++++++++++++++++++++++ 1 file changed, 116 insertions(+) create mode 100644 Project-Euler/Problem013.js diff --git a/Project-Euler/Problem013.js b/Project-Euler/Problem013.js new file mode 100644 index 0000000000..c3b22ec416 --- /dev/null +++ b/Project-Euler/Problem013.js @@ -0,0 +1,116 @@ +/* +Large Sum + +Work out the first ten digits of the sum of the following one-hundred 50-digit numbers. +*/ + +const numbers = [ + 37107287533902102798797998220837590246510135740250, + 46376937677490009712648124896970078050417018260538, + 74324986199524741059474233309513058123726617309629, + 91942213363574161572522430563301811072406154908250, + 23067588207539346171171980310421047513778063246676, + 89261670696623633820136378418383684178734361726757, + 28112879812849979408065481931592621691275889832738, + 44274228917432520321923589422876796487670272189318, + 47451445736001306439091167216856844588711603153276, + 70386486105843025439939619828917593665686757934951, + 62176457141856560629502157223196586755079324193331, + 64906352462741904929101432445813822663347944758178, + 92575867718337217661963751590579239728245598838407, + 58203565325359399008402633568948830189458628227828, + 80181199384826282014278194139940567587151170094390, + 35398664372827112653829987240784473053190104293586, + 86515506006295864861532075273371959191420517255829, + 71693888707715466499115593487603532921714970056938, + 54370070576826684624621495650076471787294438377604, + 53282654108756828443191190634694037855217779295145, + 36123272525000296071075082563815656710885258350721, + 45876576172410976447339110607218265236877223636045, + 17423706905851860660448207621209813287860733969412, + 81142660418086830619328460811191061556940512689692, + 51934325451728388641918047049293215058642563049483, + 62467221648435076201727918039944693004732956340691, + 15732444386908125794514089057706229429197107928209, + 55037687525678773091862540744969844508330393682126, + 18336384825330154686196124348767681297534375946515, + 80386287592878490201521685554828717201219257766954, + 78182833757993103614740356856449095527097864797581, + 16726320100436897842553539920931837441497806860984, + 48403098129077791799088218795327364475675590848030, + 87086987551392711854517078544161852424320693150332, + 59959406895756536782107074926966537676326235447210, + 69793950679652694742597709739166693763042633987085, + 41052684708299085211399427365734116182760315001271, + 65378607361501080857009149939512557028198746004375, + 35829035317434717326932123578154982629742552737307, + 94953759765105305946966067683156574377167401875275, + 88902802571733229619176668713819931811048770190271, + 25267680276078003013678680992525463401061632866526, + 36270218540497705585629946580636237993140746255962, + 24074486908231174977792365466257246923322810917141, + 91430288197103288597806669760892938638285025333403, + 34413065578016127815921815005561868836468420090470, + 23053081172816430487623791969842487255036638784583, + 11487696932154902810424020138335124462181441773470, + 63783299490636259666498587618221225225512486764533, + 67720186971698544312419572409913959008952310058822, + 95548255300263520781532296796249481641953868218774, + 76085327132285723110424803456124867697064507995236, + 37774242535411291684276865538926205024910326572967, + 23701913275725675285653248258265463092207058596522, + 29798860272258331913126375147341994889534765745501, + 18495701454879288984856827726077713721403798879715, + 38298203783031473527721580348144513491373226651381, + 34829543829199918180278916522431027392251122869539, + 40957953066405232632538044100059654939159879593635, + 29746152185502371307642255121183693803580388584903, + 41698116222072977186158236678424689157993532961922, + 62467957194401269043877107275048102390895523597457, + 23189706772547915061505504953922979530901129967519, + 86188088225875314529584099251203829009407770775672, + 11306739708304724483816533873502340845647058077308, + 82959174767140363198008187129011875491310547126581, + 97623331044818386269515456334926366572897563400500, + 42846280183517070527831839425882145521227251250327, + 55121603546981200581762165212827652751691296897789, + 32238195734329339946437501907836945765883352399886, + 75506164965184775180738168837861091527357929701337, + 62177842752192623401942399639168044983993173312731, + 32924185707147349566916674687634660915035914677504, + 99518671430235219628894890102423325116913619626622, + 73267460800591547471830798392868535206946944540724, + 76841822524674417161514036427982273348055556214818, + 97142617910342598647204516893989422179826088076852, + 87783646182799346313767754307809363333018982642090, + 10848802521674670883215120185883543223812876952786, + 71329612474782464538636993009049310363619763878039, + 62184073572399794223406235393808339651327408011116, + 66627891981488087797941876876144230030984490851411, + 60661826293682836764744779239180335110989069790714, + 85786944089552990653640447425576083659976645795096, + 66024396409905389607120198219976047599490197230297, + 64913982680032973156037120041377903785566085089252, + 16730939319872750275468906903707539413042652315011, + 94809377245048795150954100921645863754710598436791, + 78639167021187492431995700641917969777599028300699, + 15368713711936614952811305876380278410754449733078, + 40789923115535562561142322423255033685442488917353, + 44889911501440648020369068063960672322193204149535, + 41503128880339536053299340368006977710650566631954, + 81234880673210146739058568557934581403627822703280, + 82616570773948327592232845941706525094512325230608, + 22918802058777319719839450180888072429661980811197, + 77158542502016545090413245809786882778948721859617, + 72107838435069186155435662884062257473692284509516, + 20849603980134001723930671666823555245252804609722, + 53503534226472524250874054075591789781264330331690 +] + +const findFirstTenDigitsOfSum = () => { + const sum = numbers.reduce((prev, current) => current += prev, 0) + + return sum.toLocaleString('fullwide', { useGrouping: false }).split('').slice(0, 10).join('') +} + +console.log(findFirstTenDigitsOfSum()) From 40419bd21db52df35e538f829aa67308d6b5c889 Mon Sep 17 00:00:00 2001 From: Waddah Date: Sat, 17 Oct 2020 23:38:44 +0300 Subject: [PATCH 5/5] fix failing build by appying 'standard' on file --- Project-Euler/Problem013.js | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/Project-Euler/Problem013.js b/Project-Euler/Problem013.js index c3b22ec416..26769ab9a3 100644 --- a/Project-Euler/Problem013.js +++ b/Project-Euler/Problem013.js @@ -108,7 +108,10 @@ const numbers = [ ] const findFirstTenDigitsOfSum = () => { - const sum = numbers.reduce((prev, current) => current += prev, 0) + const sum = numbers.reduce((prev, current) => { + current += prev + return current + }, 0) return sum.toLocaleString('fullwide', { useGrouping: false }).split('').slice(0, 10).join('') }