Compilare: user.cpp: In function ‘int pune(int)’: user.cpp:38:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:70:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int z=1; z<where[i].size(); z++) ^ user.cpp:42:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d",&n,&k); ^ user.cpp:46:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&v[i]); ^