Compilare: user.cpp: In function ‘long long int findMaxSum(std::vector<int>, std::vector<int>)’: user.cpp:70:33: warning: variable ‘finalLeft’ set but not used [-Wunused-but-set-variable] long long maxSum = INT_MIN, finalLeft, finalRight, finalTop, finalBottom; ^ user.cpp:70:44: warning: variable ‘finalRight’ set but not used [-Wunused-but-set-variable] long long maxSum = INT_MIN, finalLeft, finalRight, finalTop, finalBottom; ^ user.cpp:70:56: warning: variable ‘finalTop’ set but not used [-Wunused-but-set-variable] long long maxSum = INT_MIN, finalLeft, finalRight, finalTop, finalBottom; ^ user.cpp:70:66: warning: variable ‘finalBottom’ set but not used [-Wunused-but-set-variable] long long maxSum = INT_MIN, finalLeft, finalRight, finalTop, finalBottom; ^ user.cpp: In function ‘int main()’: user.cpp:116:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("maxsubsum.in", "r", stdin); ^ user.cpp:121:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &N, &M); ^ user.cpp:126:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^ user.cpp:132:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^