Compilare: main.cpp: In function 'int main()': main.cpp:29:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<v[i].size();j++) ~^~~~~~~~~~~~ main.cpp:43:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=0;k<v[nod].size();k++) ~^~~~~~~~~~~~~~ main.cpp:13:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("dijkstra.in","r", stdin); ^ main.cpp:14:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("dijkstra.out","w", stdout); ^ main.cpp:15:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&noduri,&arce); ^ main.cpp:19:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d",&a,&b,&cost); ^