func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     long long n, m;     scanf( %I64d %I64d , &n, &m);     long long a = min(n, m);     long long b = max(n, m);     long long ans;     if (a == 1) {       ans = b / 6 * 6;       if (b % 6 == 4)         ans += 2;       else if (b % 6 == 5)         ans += 4;     } else if (a == 2) {       if (b == 2)         ans = 0;       else if (b == 3)         ans = 4;       else if (b == 7)         ans = 12;       else         ans = a * b;     } else {       ans = a * b / 2 * 2;     }     printf( %I64d n , ans);     return 0;   }   