Compilare: main.cpp: In function 'void init()': main.cpp:44:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 44 | for(j=0;j<g[f[i]].size();j++) | ~^~~~~~~~~~~~~~~ main.cpp: In function 'void djk()': main.cpp:67:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 67 | for(i=0;i<g[nod].size();i++) | ~^~~~~~~~~~~~~~