View Compilation Error

0_0_26490670_894.cpp: In function 'int main()':
0_0_26490670_894.cpp:33:65: error: 'AP' was not declared in this scope
        dp[c][i]+=1ll*dp[c+j-k][i+1]*calc(a[i]-j-k,sum[i-1]-c+1)%AP*calc(k,c)%P*r[a[i]]%P;
                                                                 ^