Date created: Sunday, July 10, 2011 7:17:38 PM. Last modified: Thursday, December 13, 2012 11:41:20 AM
Problem 8
// Project Euler - Problem 8 #include <stdlib.h> #include <iostream> #include <string.h> using namespace std; int main (int argc, char *argv[]) { string thousand = "73167176531330624919225119674426574742355349194934"\ "96983520312774506326239578318016984801869478851843"\ "85861560789112949495459501737958331952853208805511"\ "12540698747158523863050715693290963295227443043557"\ "66896648950445244523161731856403098711121722383113"\ "62229893423380308135336276614282806444486645238749"\ "30358907296290491560440772390713810515859307960866"\ "70172427121883998797908792274921901699720888093776"\ "65727333001053367881220235421809751254540594752243"\ "52584907711670556013604839586446706324415722155397"\ "53697817977846174064955149290862569321978468622482"\ "83972241375657056057490261407972968652414535100474"\ "82166370484403199890008895243450658541227588666881"\ "16427171479924442928230863465674813919123162824586"\ "17866458359124566529476545682848912883142607690042"\ "24219022671055626321111109370544217506941658960408"\ "07198403850962455444362981230987879927244284909188"\ "84580156166097919133875499200524063689912560717606"\ "05886116467109405077541002256983155200055935729725"\ "71636269561882670428252483600823257530420752963450"; int i, product, largest; product = 0; largest = 0; for(i=0;i<=994;i++) { product = atoi(thousand.substr(i, 1).c_str()) * \ atoi(thousand.substr(i+1, 1).c_str()) * \ atoi(thousand.substr(i+2, 1).c_str()) * \ atoi(thousand.substr(i+3, 1).c_str()) * \ atoi(thousand.substr(i+4, 1).c_str()); if(product>largest) { largest = product; }; } cout << largest << "\n"; return EXIT_SUCCESS; }