func_code_string: #include <bits/stdc++.h>   using namespace std;   long long n, i, j, m, x, c, count, nr, OK, suma, k, level, val, y[100], z;   void inmultire_y(long long nr) {     int i = 0;     int j = 0;     int Max = 0;     for (; i < 100; i++) y[i] = 0;     long long x2 = nr;     int n = 0;     while (x2) {       n++;       x2 /= 10;     }     x2 = nr;     for (i = 1; i <= n; i++) {       long long x1 = nr;       for (j = 1; j <= n; j++) {         y[i + j - 1] += (x2 % 10) * (x1 % 10);         Max = max(Max, i + j - 1);         if (y[i + j - 1] >= 10) {           Max = max(Max, i + j);           y[i + j] += y[i + j - 1] / 10;           y[i + j - 1] = y[i + j - 1] % 10;         }         x1 /= 10;       }       x2 /= 10;     }     y[0] = Max;   }   long long impartire_y(long long X) {     long long i;     unsigned long R = 0;     for (i = y[0]; i; i--) {       y[i] = (R = 10 * R + y[i]) / X;       R %= X;     }     while (!y[y[0]] && y[0] > 1) y[0]--;     long long r = 0;     for (i = 100; i > 0; i--) {       if (y[i]) {         for (long long j = i; j > 0; j--) {           r = r * 10 + y[j];         }         break;       }     }     return r;   }   int main() {     cin >> n;     val = 2;     for (level = 2; level <= n + 1; level++) {       x = level * (level - 1);       while (1) {         inmultire_y(x);         z = impartire_y(level - 1);         z = z - val / (level - 1);         break;       }       val = x;       cout << z <<   n ;     }     return 0;   }   