Compilare: user.cpp: In function ‘void Write()’: user.cpp:33:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < m.size(); ++i) ^ user.cpp:48:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < m.size(); ++i) ^ user.cpp:62:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < m.size(); ++i) ^ user.cpp: In function ‘void Read()’: user.cpp:105:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("joc6.in", "rt", stdin); ^ user.cpp:106:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("joc6.out", "wt", stdout); ^ user.cpp:107:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", &N); ^ user.cpp:111:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &c ); ^ user.cpp:117:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &c ); ^