func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     long long i, n, m;     while (cin >> n) {       m = n;       for (i = 1; i < n; i++) {         if (m <= i) break;         m = m - i;       }       cout << m << endl;     }     return 0;   }   