BZOJ 2287POJ Challenge消失之物

Posted 2020-08-16 ziliuziliu

dp好厉害啊。。。。。要多练才行。

#include<iostream>
#include<cstdio>
#include<cstring>
#include<algorithm>
#define maxn 2050
using namespace std;
int n,m,f[maxn][maxn],w[maxn],c[maxn][maxn];
int main()
{
    scanf("%d%d",&n,&m);
    for (int i=1;i<=n;i++) scanf("%d",&w[i]);
    f[0][0]=1;
    for (int i=1;i<=n;i++)
        for (int j=0;j<=m;j++)
        {
            f[i][j]=f[i-1][j];
            if (j>=w[i]) f[i][j]=(f[i][j]+f[i-1][j-w[i]])%10;
        }
    for (int i=1;i<=n;i++)
        for (int j=0;j<=m;j++)
        {
            if (j==0) c[i][j]=1;
            else if (j<w[i]) c[i][j]=f[n][j];
            else c[i][j]=(f[n][j]-c[i][j-w[i]]+10)%10;
        }
    for (int i=1;i<=n;i++)
    {
        for (int j=1;j<=m;j++)
            printf("%d",c[i][j]%10);
        printf("\n");
    }
    return 0;
}