hdu 1074 状压dp

//2015.7.16 首A

#include "bits/stdc++.h"
using namespace std;
int T;
int N;
char subject[20][110];
int deadline[20], spend[20];
int dp[40000], choice[40000], tot_spend[40000];

int ans[20], tot;

const int INF = 0x3f3f3f3f;

void print_2(int val)
{
    if(val) {
        print_2(val >> 1);
        printf("%d", val & 1);
    }
}

int main()
{
    scanf("%d", &T);
    while(T--) {
        memset(dp, 0x3f, sizeof(dp));
        memset(choice, 0, sizeof(choice));
        dp[0] = 0;
        scanf("%d", &N);

        int i;
        for(i = 1; i <= N; ++i) {
            scanf("%s%d%d", subject[i], &deadline[i], &spend[i]);
        }
        int s, tot_s = (1 << N) - 1;
        int item, step_s, pre_s;
        for(s = 1; s <= tot_s; ++s) {
            for(item = 1; item <= N; ++item) {
                step_s = 1 << (item - 1);

                if(step_s & s) {
                    pre_s = s ^ step_s;
                    if(dp[s] == INF) {
                        tot_spend[s] = tot_spend[pre_s] + spend[item];
                    }
                    int tmp = tot_spend[s] - deadline[item];

                    if(dp[s] > dp[pre_s] + (tmp < 0? 0: tmp) || (dp[s] == dp[pre_s] + (tmp < 0? 0: tmp) && strcmp(subject[item], subject[choice[s]]) > 0)) {
                        dp[s] = dp[pre_s] + (tmp < 0? 0: tmp);
                        choice[s] = item;
//                        printf("dp[");
//                        print_2(s);
//                        printf("] == ");
//
//                        printf("dp[");
//                        if(pre_s)
//                            print_2(pre_s);
//                        else
//                            printf("0");
//                        printf("] + %d  == %d
", tmp < 0? 0: tmp, dp[s]);
                    }
                }
            }
        }
        tot = 0;
        for(s = tot_s; s; s ^= (1 << (choice[s] - 1))) {
            ++tot;
            ans[tot] = choice[s];
        }
        printf("%d
", dp[tot_s]);
        for(i = tot; i >= 1; --i) {
            printf("%s
", subject[ans[i]]);
        }
    }
}