View Compilation Error

0_0_19216444_26317.cpp: In function 'int main()':
0_0_19216444_26317.cpp:53:27: error: 'scanf' was not declared in this scope
  while(~scanf("%d%d",&m,&n))
                           ^
0_0_19216444_26317.cpp:80:24: error: 'printf' was not declared in this scope
   printf("%d\n%d\n",x,y);
                        ^
0_0_19216444_26317.cpp:83:10: error: 'puts' was not declared in this scope
   puts("");
          ^