Compilare: main.cpp: In function 'void dfs(long long int, long long int)': main.cpp:20:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<g[fiu].size(); i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:50:28: warning: narrowing conversion of 'v[i]' from 'long long int' to 'int' inside { } [-Wnarrowing] g[i].push_back({v[i],w[i]}); ~~~^ main.cpp:50:33: warning: narrowing conversion of 'w[i]' from 'long long int' to 'int' inside { } [-Wnarrowing] g[i].push_back({v[i],w[i]}); ~~~^ main.cpp:51:33: warning: narrowing conversion of 'w[i]' from 'long long int' to 'int' inside { } [-Wnarrowing] g[v[i]].push_back({i,w[i]}); ~~~^