Compilare: user.cpp: In function ‘void solve1()’: user.cpp:52:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < fin.size(); i++) ^ user.cpp: In function ‘void solve2()’: user.cpp:86:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < p.second.size(); i++) ^ user.cpp: In function ‘void citire()’: user.cpp:21:12: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(s); ^ user.cpp:34:16: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(s); ^ user.cpp: In function ‘void solve2()’: user.cpp:64:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("mesaje.in", "r", stdin); ^ user.cpp:68:16: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(s); ^ user.cpp: In function ‘int main()’: user.cpp:96:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("mesaje.in", "r", stdin); ^ user.cpp:97:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("mesaje.out", "w", stdout); ^ /tmp/ccbNHqB4.o: In function `citire()': user.cpp:(.text+0x19): warning: the `gets' function is dangerous and should not be used.