2015
05-23

Hero

When playing DotA with god-like rivals and pig-like team members, you have to face an embarrassing situation: All your teammates are killed, and you have to fight 1vN.

There are two key attributes for the heroes in the game, health point (HP) and damage per shot (DPS). Your hero has almost infinite HP, but only 1 DPS.

To simplify the problem, we assume the game is turn-based, but not real-time. In each round, you can choose one enemy hero to attack, and his HP will decrease by 1. While at the same time, all the lived enemy heroes will attack you, and your HP will decrease by the sum of their DPS. If one hero’s HP fall equal to (or below) zero, he will die after this round, and cannot attack you in the following rounds.

Although your hero is undefeated, you want to choose best strategy to kill all the enemy heroes with minimum HP loss.

The first line of each test case contains the number of enemy heroes N (1 <= N <= 20). Then N lines followed, each contains two integers DPSi and HPi, which are the DPS and HP for each hero. (1 <= DPSi, HPi <= 1000)

The first line of each test case contains the number of enemy heroes N (1 <= N <= 20). Then N lines followed, each contains two integers DPSi and HPi, which are the DPS and HP for each hero. (1 <= DPSi, HPi <= 1000)

1
10 2
2
100 1
1 100

20
201

/*

简单贪心。
我来个擦，难道当真是流年不利、今年不适合我做题？怎么这两天

思路很简单，和今年金华的A题是一样的，对E[i].t*E[l].v进行排

2012-12-12
*/

#include"stdio.h"
#include"string.h"
#include"stdlib.h"
struct A
{
int t,v;
}E[30];
int cmp(const void *a,const void *b)
{
A *c,*d;
c=(A *)a;
d=(A *)b;
return (c->t*d->v)-(d->t*c->v);
}

int main()
{
int n;
int i,l;
int base,ans;
while(scanf("%d",&n)!=-1)
{
base=0;
for(i=0;i<n;i++)	{scanf("%d%d",&E[i].v,&E[i].t);base+=E[i].v;}
qsort(E,n,sizeof(E[0]),cmp);

ans=0;
for(i=0;i<n;i++)
{
ans+=base*E[i].t;
base-=E[i].v;
}
printf("%d\n",ans);
}
return 0;
}

1. to Tourist_2014。你知道世界上有一种叫马的动物么？如果让全世界的古人来选择一种最佳的宠物，伴侣动物，你认为是马还是狗？

2. to Tourist_2014。你知道世界上有一种叫马的动物么？如果让全世界的古人来选择一种最佳的宠物，伴侣动物，你认为是马还是狗？

3. to Tourist_2014。你知道世界上有一种叫马的动物么？如果让全世界的古人来选择一种最佳的宠物，伴侣动物，你认为是马还是狗？

4. to Tourist_2014。你知道世界上有一种叫马的动物么？如果让全世界的古人来选择一种最佳的宠物，伴侣动物，你认为是马还是狗？

5. to Tourist_2014。你知道世界上有一种叫马的动物么？如果让全世界的古人来选择一种最佳的宠物，伴侣动物，你认为是马还是狗？