Compilare: user.cpp: In function ‘void inserts(long long int)’: user.cpp:15:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<v[key].size();j++) ^ user.cpp: In function ‘bool check(int)’: user.cpp:36:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<s[cnt].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:55:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] {f>>s[cnt];if(s[cnt].size()<mn) mn=s[cnt].size();} ^