Compilare: user.cpp: In function ‘long long int findMaxSum(int*, int*, int, int)’: user.cpp:71:30: warning: variable ‘finalLeft’ set but not used [-Wunused-but-set-variable] long long maxSum = INT_MIN, finalLeft, finalRight, finalTop, finalBottom; ^ user.cpp:71:41: warning: variable ‘finalRight’ set but not used [-Wunused-but-set-variable] long long maxSum = INT_MIN, finalLeft, finalRight, finalTop, finalBottom; ^ user.cpp:71:53: warning: variable ‘finalTop’ set but not used [-Wunused-but-set-variable] long long maxSum = INT_MIN, finalLeft, finalRight, finalTop, finalBottom; ^ user.cpp:71:63: 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:123:37: 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:124:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &N, &M); ^ user.cpp:128:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^ user.cpp:135:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^ user.cpp:149:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("maxsubsum.out", "w", stdout); ^