Compilare: main.cpp: In function 'int main()': main.cpp:89:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<drept.size();i++) ~^~~~~~~~~~~~~ main.cpp:58:37: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d%d%d",&n,&m,&w,&h); ^ main.cpp:62:31: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&x,&y); ^ main.cpp:71:31: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&x,&y); ^