Compilare: main.cpp: In function 'int ok(int)': main.cpp:21:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(f<v.size()&&v[f].val<c&&t>=0) ~^~~~~~~~~ main.cpp: In function 'int main()': main.cpp:54:38: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d%d%d",&p,&n,&m,&k); ^ main.cpp:59:39: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&mat[i][j]); ^