Compilare: user.cpp: In function ‘void dijkstra(int)’: user.cpp:24:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<g[node].size(); i++) { ^ user.cpp: In function ‘int main()’: user.cpp:42:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi, "%d%d", &n, &m); ^ user.cpp:44:44: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi, "%d%d%d", &a, &b, &cost); ^