Compilare: user.cpp: In function ‘int main()’: user.cpp:24:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(y=0;y<asdf[key].size();y++) ^ user.cpp:40:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(y=0;y<asdf[key].size();y++) ^ user.cpp:54:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(y=0;y<asdf[key].size();y++) ^ user.cpp:14:21: warning: unused variable ‘z’ [-Wunused-variable] int op,num,x,temp,y,z; ^ user.cpp:10:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("hashuri.in","r",stdin); ^ user.cpp:11:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("hashuri.out","w",stdout); ^