Compilare: user.cpp: In function ‘int main()’: user.cpp:46:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < Sol.size(); ++i){ ^ user.cpp:55:60: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(Sol[i] == Sol[i + 1] - m && i + 1 < Sol.size()){ ^ user.cpp:28:9: warning: unused variable ‘nr2’ [-Wunused-variable] int nr2 = 0; ^ user.cpp:37:9: warning: unused variable ‘ok’ [-Wunused-variable] int ok = 0; ^ user.cpp:29:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("potriveala.in", "r", stdin); ^ user.cpp:30:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("potriveala.out", "w", stdout); ^ user.cpp:31:16: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(b + 1); ^ user.cpp:32:16: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(a + 1); ^ /tmp/ccUso18F.o: In function `main': user.cpp:(.text.startup+0x5f): warning: the `gets' function is dangerous and should not be used.