Compilare: user.cpp: In function ‘int main()’: user.cpp:54:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 0; k < G[j].size(); k++) ^ user.cpp:57:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 0; k < G[i].size(); k++) ^ user.cpp:60:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 0;k < G[i].size(); k++) ^ user.cpp:44:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d%d",&n,&m,&d); ^ user.cpp:47:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&v[i]); ^