/in/foo.cc: In function 'int main()':
/in/foo.cc:40:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d%d",&n,&r,&q);  
                             ^
/in/foo.cc:42:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&ans[i].s);  
                              ^
/in/foo.cc:46:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&ans[i].w);  
                              ^