View Compilation Error

0_0_15270362_636.cpp: In function 'int main()':
0_0_15270362_636.cpp:28:51: error: 'max' was not declared in this scope
                 dp[i][j]=max(dp[i+1][j],dp[i][j-1]);
                                                   ^
0_0_15270362_636.cpp:34:42: error: 'max' was not declared in this scope
         ans=max(ans,dp[0][i]+dp[i+1][n-1]);
                                          ^