Compilare: main.cpp: In function 'int ok(std::map<long long int, int>)': main.cpp:25:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<allsq.size();i++){ ~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:67:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<sq1.size();i++) ~^~~~~~~~~~~ main.cpp:68:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<sq2.size();j++){ ~^~~~~~~~~~~