View Compilation Error

0_0_20782426_12830.cpp: In function 'int main()':
0_0_20782426_12830.cpp:8:29: error: 'scanf' was not declared in this scope
     while(scanf("%d%d",&n,&m)!=EOF)  
                             ^
0_0_20782426_12830.cpp:8:32: error: 'EOF' was not declared in this scope
     while(scanf("%d%d",&n,&m)!=EOF)  
                                ^
0_0_20782426_12830.cpp:51:26: error: 'printf' was not declared in this scope
             printf("No\n");
                          ^
0_0_20782426_12830.cpp:53:27: error: 'printf' was not declared in this scope
             printf("Yes\n");           
                           ^