Compilare: user.cpp: In function ‘int main()’: user.cpp:31:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("vila.in", "r", stdin); ^ user.cpp:32:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("vila.out", "w", stdout); ^ user.cpp:100:25: warning: ‘c’ may be used uninitialized in this function [-Wmaybe-uninitialized] cout << l << " " << c << " " << ma; ^ user.cpp:100:13: warning: ‘l’ may be used uninitialized in this function [-Wmaybe-uninitialized] cout << l << " " << c << " " << ma; ^