AOJ 0014 Integral
#include <cstdio> int main() { int d; while(~scanf("%d\n", &d)){ long long total = 0; for(int i = d; i < 600; i += d) total += (long long)i * i * d; printf("%lld\n", total); } return 0; }
#include <cstdio> int main() { int d; while(~scanf("%d\n", &d)){ long long total = 0; for(int i = d; i < 600; i += d) total += (long long)i * i * d; printf("%lld\n", total); } return 0; }