Compilare: user.cpp: In function ‘int main()’: user.cpp:108:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("boundingbox.in", "r", stdin); ^ user.cpp:109:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("boundingbox.out", "w", stdout); ^ user.cpp:111:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &t); ^ user.cpp:118:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d\n", &r, &c); ^ user.cpp:124:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c", &mat[i][j]); ^ user.cpp:129:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("\n"); ^ user.cpp: In function ‘void solve(int, int, int, int, int)’: user.cpp:103:33: warning: ‘rezi’ may be used uninitialized in this function [-Wmaybe-uninitialized] rez = rez + (long long)rezi * (i2 - i1 + 1) * (j2 - j1 + 1); ^