uva_cpp_clean/10036/10036-21.cpp

/*
  >>~~ UVa Online Judge ACM Problem Solution ~~<<

  ID: 10036
  Name: Divisibility
  Problem: https://onlinejudge.org/external/100/10036.pdf
  Language: C++

  Author: Arash Shakery
  Email: [email protected]
*/

#include <stdio.h>
#include <math.h>
#include <iostream>
using namespace std;


int d[10001],k,n;

int saved[10001][101];
bool smod(int ind,int m){
    if(m<0)m+=k;

    if(ind==n-1)
        return d[ind]%k==m;

    if(saved[ind][m]!=-1)return saved[ind][m];

    return saved[ind][m]=(    smod(ind+1,(m+d[ind]%k)%k)||
                            smod(ind+1,m-d[ind]%k));
}

int main(){
    int T,i,j;
    cin>>T;
    while(T--){
        cin>>n>>k;
        for(i=0;i<n;i++){
            cin>>d[i];
            if(d[i]<0)d[i]=-d[i];
        }

        for(i=0;i<=n;i++)
            for(j=0;j<=k;j++)
                saved[i][j]=-1;

        if(smod(0,0))
            puts("Divisible");
        else
            puts("Not divisible");
    }
}