func_code_string: #include <bits/stdc++.h>   using namespace std;   int N, M;   int used[10];   int main() {     cin >> N >> M;     int len1 = 1, len2 = 1;     for (int a = 7; a < N; a *= 7) {       ++len1;     }     for (int b = 7; b < M; b *= 7) {       ++len2;     }     int answer = 0;     if (len1 + len2 <= 7) {       for (int i = 0; i != N; ++i) {         for (int j = 0; j != M; ++j) {           for (int k = 0; k <= 6; ++k) {             used[k] = 0;           }           for (int a = i, k = 0; k != len1; ++k, a /= 7) {             used[a % 7]++;           }           for (int b = j, k = 0; k != len2; ++k, b /= 7) {             used[b % 7]++;           }           int mx = 0;           for (int i = 0; i < 7; ++i) {             mx = max(mx, used[i]);           }           if (mx < 2) {             ++answer;           }         }       }     }     cout << answer <<   n ;     return 0;   }   