Problem28
/* * \file problem028.cpp * \brief うずまき * * \author Takushi Homma (b1006018@fun.ac.jp) * \date 2010/03/01 18:40:13 */ #include <iostream> using namespace std; #define LEN 1001 int main(int argc, char **argv) { int ans = 1; int ru = 1; for (int l = 3, d = 2; l <= LEN; l+=2, d+=2) { ans += d*10 + ru*4; ru += (l-1) * 4; } cout << ans << endl; return 0; }