Compilare: user.cpp: In function ‘void solve(int)’: user.cpp:75:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<vecin[nod].size();i++){ ^ user.cpp:79:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<aux.size();i++){ ^ user.cpp:81:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=i+1;j<aux.size();j++){ ^ user.cpp:88:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<aux.size();i++){ ^ user.cpp: In function ‘int getInt()’: user.cpp:103:16: 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:118:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("tric.in","r",stdin); ^ user.cpp:119:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("tric.out","w",stdout); ^ /tmp/ccIXgi6h.o: In function `getInt()': user.cpp:(.text+0x298): warning: the `gets' function is dangerous and should not be used.