| ||||||||||
| Online Judge | Problem Set | Authors | Online Contests | User | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Web Board Home Page F.A.Qs Statistical Charts | Current Contest Past Contests Scheduled Contests Award Contest | |||||||||
牛人给瞧瞧,郁闷,兄弟是在没招了,程序还好读!#include<iostream>
using namespace std;
int m,stick[30],count,used[30];
int cmp(const void *a,const void *b)
{
return *(int*)a<*(int*)b?1:-1;
}
bool soval(int s,int side)
{
if(side==0)
{
count++;
return true;
}
for(int i=s;i<m;i++)
{
if(used[i] || side<stick[i])
continue;
if(soval(i+1,side-stick[i]))
{
used[i]=true;
return true;
}
}
return false;
}
int main()
{
int n,i,all,side;
scanf("%d",&n);
while(n--)
{
scanf("%d",&m);
all=0;
count=0;
memset(used,false,sizeof(used));
for(i=0;i<m;i++)
{
scanf("%d",&stick[i]);
all+=stick[i];
}
side=all/4;
if(side*4==all)
{
qsort(stick,m,sizeof(stick[0]),cmp);
if(stick[0]>side)
{
printf("no\n");
}
else
{
while(soval(0,side));
if(count==4)
{
printf("yes\n");
}
else
{
printf("no\n");
}
}
}
else
{
printf("no\n");
}
}
return 0;
}
Followed by:
Post your reply here: |
All Rights Reserved 2003-2013 Ying Fuchen,Xu Pengcheng,Xie Di
Any problem, Please Contact Administrator