Compilare: user.cpp: In function ‘void dijkstra(int)’: user.cpp:38:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < adjList[nod.first].size(); ++i) { ^ user.cpp: In function ‘int main()’: user.cpp:53:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d", &n, &m); ^ user.cpp:55:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d%d", &a, &b, &l); ^