Compilare: user.cpp: In function ‘int main()’: user.cpp:35:34: warning: narrowing conversion of ‘b’ from ‘long long int’ to ‘int’ inside { } [-Wnarrowing] gr[a].push_back({b, c, d}); ^ user.cpp:36:34: warning: narrowing conversion of ‘a’ from ‘long long int’ to ‘int’ inside { } [-Wnarrowing] gr[b].push_back({a, c, d}); ^