View Compilation Error

0_0_20998326_25133.cpp: In function 'int Dfs(int, int, int)':
0_0_20998326_25133.cpp:8:26: error: 'min' was not declared in this scope
         ans = min(ans,num);
                          ^
0_0_20998326_25133.cpp: In function 'int main()':
0_0_20998326_25133.cpp:18:14: error: 'S' was not declared in this scope
     while(S(T)!=EOF)
              ^
0_0_20998326_25133.cpp:18:17: error: 'EOF' was not declared in this scope
     while(S(T)!=EOF)
                 ^
0_0_20998326_25133.cpp:21:19: error: 'S2' was not declared in this scope
             S2(n,a);
                   ^
0_0_20998326_25133.cpp:22:17: error: 'FI' was not declared in this scope
             FI(n) S(pri[i]);
                 ^
0_0_20998326_25133.cpp:23:27: error: 'sort' was not declared in this scope
             sort(pri,pri+n);
                           ^
0_0_20998326_25133.cpp:24:19: error: 'INF' was not declared in this scope
             ans = INF;
                   ^
0_0_20998326_25133.cpp:27:30: error: 'printf' was not declared in this scope
             printf("%d\n",ans);
                              ^