View Compilation Error

0_0_36457723_28664.cpp:1:1: error: 'include' does not name a type
 include <bits/stdc++.h>
 ^
0_0_36457723_28664.cpp:11:9: error: 'pair' does not name a type
 typedef pair<int,int>pii;
         ^
0_0_36457723_28664.cpp: In function 'void dfs(long long int, long long int)':
0_0_36457723_28664.cpp:34:40: error: 'max' was not declared in this scope
   int wmn=min(f[to][1]+max(0LL,w-a[now]),f[to][0]+max(0LL,w-a[to]-a[now]));
                                        ^
0_0_36457723_28664.cpp:34:74: error: 'min' was not declared in this scope
   int wmn=min(f[to][1]+max(0LL,w-a[now]),f[to][0]+max(0LL,w-a[to]-a[now]));
                                                                          ^
0_0_36457723_28664.cpp: In function 'int main()':
0_0_36457723_28664.cpp:47:17: error: 'scanf' was not declared in this scope
  scanf("%lld",&t);
                 ^
0_0_36457723_28664.cpp:69:22: error: 'printf' was not declared in this scope
   printf("%lld\n",ans);
                      ^