View Compilation Error

0_0_33570154_20944.cpp: In function 'int main()':
0_0_33570154_20944.cpp:56:2: error: '_' was not declared in this scope
 {_
  ^
0_0_33570154_20944.cpp:58:31: error: 'n' was not declared in this scope
         while(scanf("%d%d%d",&n,&x,&y)!=EOF)
                               ^
0_0_33570154_20944.cpp:58:34: error: 'x' was not declared in this scope
         while(scanf("%d%d%d",&n,&x,&y)!=EOF)
                                  ^
0_0_33570154_20944.cpp:58:37: error: 'y' was not declared in this scope
         while(scanf("%d%d%d",&n,&x,&y)!=EOF)
                                     ^