Compilare: user.cpp: In function ‘int main()’: user.cpp:31:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0; j<v[i].size(); j++) ^ user.cpp:34:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int h=0; h<v[vecin].size(); h++) ^ user.cpp:18:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&n,&muchii); ^ user.cpp:22:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&a,&b); ^