Compilare: user.cpp: In function ‘int cauta(int, int)’: user.cpp:16:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(G[v[0]].size()<l) ^ user.cpp:23:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(G[v[i]].size()<l||!(G[v[i]][l-1].val1==x1&&G[v[i]][l-1].val2==x2)) ^ user.cpp: In function ‘int main()’: user.cpp:33:31: 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:54:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d" ,&t); ^ user.cpp:56:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d" ,&v[j]); ^