View Compilation Error

0_0_21490567_1371.cpp:10:1: error: 'vector' does not name a type
 vector<LL> prime;
 ^
0_0_21490567_1371.cpp: In function 'int main()':
0_0_21490567_1371.cpp:16:24: error: 'prime' was not declared in this scope
   if(notprime[i] == 0) prime.push_back(i);
                        ^
0_0_21490567_1371.cpp:29:21: error: 'prime' was not declared in this scope
   for(LL i = 0; i < prime.size(); i++){
                     ^