Compilare: main.cpp: In function 'int dijkstra(int, int)': main.cpp:54:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 54 | for(i = 0; i < adj[u.u].size(); i++) | ~~^~~~~~~~~~~~~~~~~ main.cpp:61:32: warning: narrowing conversion of '(((ll)u.vertex::cost) + cost[u.vertex::u][nod])' from 'll' {aka 'long long int'} to 'int' [-Wnarrowing] 61 | q.push({u.cost + cost[u.u][nod], nod}); | ~~~~~~~^~~~~~~~~~~~~~~~ main.cpp: In function 'void solve()': main.cpp:84:18: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 84 | for(i = 0; i < v[x].size(); i++) | ~~^~~~~~~~~~~~~ main.cpp:101:30: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 101 | for(j = 0; j < v[fr].size(); j++) | ~~^~~~~~~~~~~~~~