Compilare: user.cpp: In function ‘int search_hash(int)’: user.cpp:21:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int it = 0;it < Hash[list].size();it++) ^ user.cpp: In function ‘void solve()’: user.cpp:51:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz != Hash[cod % MOD].size()+1) ^ user.cpp:55:18: warning: statement has no effect [-Wunused-value] for(j;j<=M;j++) ^ user.cpp:61:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz != Hash[cod % MOD].size()+1) ^ user.cpp:68:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<Hash[i].size();j++) ^