Happy Programming Contest

http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemId=4995

0-1背包，按照时间排序保证总时间最小。以后写if-else注意多continue，还有0-1背包不需要多加一维。

以后注意。

View Code

const int MM = 1111;
#define debug puts("wrong")
//typedef __int64 int64;
int N,M;
int dp[MM][4];
struct Info{int t,v;}g[MM];
bool cmp(Info x,Info y) {return x.t==y.t?x.v<y.v:x.t<y.t;}
/*
100
10 5
2 4 6 8 10
2 4 6 8 10
*/
void get_data() {int i,j,k;scanf("%d%d",&M,&N);for(i=1;i<=N;i++) scanf("%d",&g[i].t);for(i=1;i<=N;i++) scanf("%d",&g[i].v);sort(g+1,g+N+1,cmp);
}
void solve() {int i,j,k,tmp,t1,tt;memset(dp,0,sizeof(dp));for(i=1;i<=N;i++) {for(j=M;j>=g[i].t;j--) {tmp=dp[j-g[i].t][0]+g[i].v;if(tmp>dp[j][0]) {dp[j][0]=tmp;dp[j][1]=dp[j-g[i].t][1]+1;dp[j][2]=dp[j-g[i].t][2]+j;continue;}else if(tmp==dp[j][0]) {tt=dp[j-g[i].t][1]+1;if(tt>dp[j][1]) {dp[j][1]=tt;dp[j][2]=dp[j-g[i].t][2]+j;continue;}else if(tt==dp[j][1]) {t1=dp[j-g[i].t][2]+j;dp[j][2]=f_min(t1,dp[j][2]);continue;}}//    printf("%d %d %d %d %d\n",i,j,dp[j][0],dp[j][1],dp[j][2]);
        }}int a1=-1,a2=-1,a3=-1;for(i=0;i<=M;i++) {if(a1==-1||dp[i][0]>a1) {a1=dp[i][0], a2=dp[i][1], a3=dp[i][2];continue;}if(dp[i][0]==a1) {if(a2==-1||a2<dp[i][1]) {a2=dp[i][1], a3=dp[i][2];continue;}if(a2==dp[i][1]) {if(a3==-1||a3>dp[i][2]) a3=dp[i][2];}}}printf("%d %d %d\n",a1,a2,a3);
}
int main() {int ca; scanf("%d",&ca);while(ca--) get_data(),solve();return 0;
}

转载于:https://www.cnblogs.com/zhang1107/archive/2013/04/26/3044693.html

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