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;
}