View Compilation Error

0_0_30448496_3985.cpp: In function 'int main()':
0_0_30448496_3985.cpp:66:3: error: 'flag' was not declared in this scope
   flag=0;
   ^
0_0_30448496_3985.cpp:67:10: error: 'rd' was not declared in this scope
   memset(rd,0,sizeof(rd));
          ^