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有谁帮我看一下?WA

Posted by BJ051155 at 2007-07-23 17:04:42 on Problem 2982
#include <iostream>
using namespace std;	
int stackx[20000],stacky[20000];
int cost[200][200];

int main(int argc, char* argv[])
{
	short n,m,k;
	int a[105],b[105],c[105];
	while(scanf("%d%d%d",&n,&m,&k))
	{
		if(n==0&&m==0&&k==0)
			break;
		for(int i=0;i<k;i++)
			scanf("%d%d%d",&a[i],&b[i],&c[i]);
		for(i=0;i<200;i++)
			for(int j=0;j<200;j++)
				cost[i][j]=0;
		int qh=0,qe=1;
		stackx[qh]=0;
		stacky[qh]=0;
		while(qh<qe)
		{
			for(i=0;i<k;i++)
			{
				int x=stackx[qh]+a[i];
				int y=stacky[qh]+b[i];
				if(x>=0&&y>=0&&x<=n&&y<=m&&(cost[x][y]==0||cost[stackx[qh]][stacky[qh]]+c[i]<cost[x][y]))
				{
					stackx[qe]=x;
					stacky[qe]=y;
					qe++;
					cost[x][y]=cost[stackx[qh]][stacky[qh]]+c[i];
				}
			}
			qh++;
		}
		if(cost[n][m]==0)
			printf("-1\n");
		else
			printf("%d\n",cost[n][m]);
	}
	return 0;
}

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