View Compilation Error

0_0_21817238_4709.cpp:1:59: error: stray '#' in program
 <pre name="code" class="cpp"><pre name="code" class="cpp">#include <cstdio>
                                                           ^
0_0_21817238_4709.cpp:1:1: error: expected unqualified-id before '<' token
 <pre name="code" class="cpp"><pre name="code" class="cpp">#include <cstdio>
 ^
0_0_21817238_4709.cpp: In function 'int main()':
0_0_21817238_4709.cpp:44:26: error: 'scanf' was not declared in this scope
  while(scanf("%d%d",&n,&m)!=EOF){
                          ^
0_0_21817238_4709.cpp:44:29: error: 'EOF' was not declared in this scope
  while(scanf("%d%d",&n,&m)!=EOF){
                             ^
0_0_21817238_4709.cpp:54:23: error: 'printf' was not declared in this scope
   printf("%d\n",dis[n]);  
                       ^