View Compilation Error

0_0_22129879_21267.cpp:19:1: error: 'bitset' does not name a type
 bitset<90>dp[11];
 ^
0_0_22129879_21267.cpp: In function 'int check(int, int, int)':
0_0_22129879_21267.cpp:25:26: error: 'dp' was not declared in this scope
     for(int i=0;i<=n;i++)dp[i].reset();
                          ^
0_0_22129879_21267.cpp:26:5: error: 'dp' was not declared in this scope
     dp[0][0]=1;
     ^