Compilare: user.cpp: In function ‘int main()’: user.cpp:55:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<g[i].size() && !sol;j++) ^ user.cpp:30:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1,"%d",&t); ^ user.cpp:35:42: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1,"%d%d%d%d",&n,&d,&c,&v); ^ user.cpp:38:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1,"%d%d",&x,&y); ^