Compilare: main.cpp: In function 'int main()': main.cpp:29:24: warning: comparison of integer expressions of different signedness: 'std::set<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 29 | if(s2[i].size()==nr_muchii) {fout<<i;return 0;} | ~~~~~~~~~~~~^~~~~~~~~~~ main.cpp:34:28: warning: comparison of integer expressions of different signedness: 'std::set<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 34 | if(s2[i].size()>M) M=s2[i].size(),x=i; | ~~~~~~~~~~~~^~ main.cpp:39:28: warning: comparison of integer expressions of different signedness: 'std::set<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 39 | if(s2[i].size()>M) M=s2[i].size(),y=i; | ~~~~~~~~~~~~^~ main.cpp:10:15: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized] 10 | int i,m,x,y; | ^