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hdu 1224 Free DIY Tour(dp)

题目:

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题意:

        

思路:

代码:

#include <iostream>
#include <cstdio>
#include <cstring>
using namespace std;

int map[110][110];
int dp[110],next[110],ins[110];
int t,n,m;

void output(int x)
{
    if(x == -1)
        return ;
    output(next[x]);
    printf("%d->",x);
}

void ddpp()
{
    for(int i=1; i<=n+1; i++)
    {
        for(int j=1; j<i; j++)
        {
            if(map[j][i] != -1 && dp[j] + map[j][i] > dp[i])
            {
                dp[i] = dp[j] + map[j][i];
                next[i] = j;
            }
        }
    }
}

int main()
{
    //freopen("input.txt","r",stdin);
    int a,b;
    int kase = 1;
    cin>>t;
    while(t--)
    {
        scanf("%d",&n);
        memset(map,-1,sizeof(map));
        memset(dp,0,sizeof(dp));
        for(int i=1; i<=n; i++)
        {
            scanf("%d",&ins[i]);
        }
        ins[n+1] = 0;
        scanf("%d",&m);
        for(int i=1; i<=m; i++)
        {
            scanf("%d%d",&a,&b);
            map[a][b] = ins[b];
        }
        next[1] = -1;
        ddpp();
        if(kase > 1)
            printf("\n");
        printf("CASE %d#\n",kase++);
        printf("points : %d\n",dp[n+1]);
        printf("circuit : ");
        output(next[n+1]);
        printf("1\n");
    }
    return 0;
}

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收获:

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战斗,从不退缩;奋斗,永不停歇~~~~~~~~~~