func_code_string: #include <bits/stdc++.h>   using namespace std;   template <typename Tp>   inline void read(Tp& x) {     x = 0;     int f = 1;     char ch = getchar();     while (!isdigit(ch)) {       if (ch ==  - ) f = -1;       ch = getchar();     }     while (isdigit(ch)) {       x = x * 10 + ch -  0 ;       ch = getchar();     }     x *= f;   }   int buf[22];   template <typename Tp>   inline void write(Tp x) {     int p = 0;     if (x < 0) {       putchar( - );       x = -x;     }     if (x == 0)       buf[++p] = 0;     else       while (x) {         buf[++p] = x % 10;         x /= 10;       }     for (int i = p; i; i--) putchar( 0  + buf[i]);   }   int m, b;   int main() {     scanf( %d%d , &m, &b);     long long int ans = 0;     for (int y = 0; y <= b; y++) {       int x = m * (b - y);       ans = max(ans, 1ll * (1 + x) * (1 + y) * (x + y) / 2);     }     printf( %lld n , ans);     return 0;   }   