Compilare: main.cpp: In function 'int dijkstra(int)': main.cpp:24:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<trip>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | for(int i=0;i<G[x].size();i++){ | ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:70:20: warning: 'sol' may be used uninitialized [-Wmaybe-uninitialized] 70 | fout<<mn<<' '<<sol; | ^~~ main.cpp:59:34: note: 'sol' was declared here 59 | int mn=dijkstra(k),st=1,dr=k,sol; | ^~~