View Compilation Error

0_0_16211087_21095.cpp:5:1: error: 'vector' does not name a type
 vector<int> vt[MAXN];
 ^
0_0_16211087_21095.cpp: In function 'int main()':
0_0_16211087_21095.cpp:10:26: error: 'RIV' was not declared in this scope
  while (~RIV(a, b, all, c))
                          ^
0_0_16211087_21095.cpp:13:11: error: 'INF' was not declared in this scope
   CLR(dp, INF);
           ^
0_0_16211087_21095.cpp:13:14: error: 'CLR' was not declared in this scope
   CLR(dp, INF);
              ^
0_0_16211087_21095.cpp:14:7: error: 'i' was not declared in this scope
   REP(i, MAXN) vt[i].clear();
       ^
0_0_16211087_21095.cpp:14:14: error: 'REP' was not declared in this scope
   REP(i, MAXN) vt[i].clear();
              ^
0_0_16211087_21095.cpp:16:13: error: 'FE' was not declared in this scope
   FE(i, 1, a) RI(ipta[i]);
             ^
0_0_16211087_21095.cpp:39:9: error: 'WI' was not declared in this scope
   WI(ans);
         ^