Compilare: user.cpp: In function ‘void dijkstra(int)’: user.cpp:54:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < M[x].size(); ++i) ^ user.cpp:73:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0 ; i < M[poz].size(); ++i) ^ user.cpp: In function ‘int main()’: user.cpp:24:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &n, &m);//fin >> n >> m; ^ user.cpp:34:42: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d", &x, &y, &c);//fin >> x >> y >> c; ^