func_code_string: #include <bits/stdc++.h>   using namespace std;   template <typename T>   inline const T MAX(T a, T b) {     return ((a) > (b) ? (a) : (b));   }   template <typename T>   inline const T MIN(T a, T b) {     return ((a) > (b) ? (b) : (a));   }   template <typename T>   inline const T ABS(T a) {     return (((a) > 0) ? (a) : (-(a)));   }   int main() {     ios_base::sync_with_stdio(false);     cin.tie(0);     int a, b, c;     cin >> a >> b >> c;     cout << (a * b) + (b * c) + (c * a) - (a + b + c) + 1 << endl;     return 0;   }   