在做一个0-1背包最基本的题的时候居然运行错了：

#include <iostream>

using namespace std;

int dp[1005];															//dp表格 
int w[105], c[105];	
int main()
{
	int n, m;															//容量，物品数目
	cin >> n >> m;													 	//物品占容，物品价值 
	for (int i = 1; i <= n; i++)
	{
		cin >> w[i] >> c[i];
	}
	
	for (int i = 1; i <= m; i++)
	{		
		for (int j = n; j >= w[i]; j--)
		{
		
				dp[j] = max(dp[j], dp[j - w[i]] + c[i]);				
		}
	}
	
//	int ans = dp[n];
	cout << dp[n];
	
	return 0;
}

Runtime Error:Segmentation fault
Runtime Error:Segmentation fault
Runtime Error:Segmentation fault
Runtime Error:Segmentation fault
Runtime Error:Segmentation fault
Runtime Error:Segmentation fault
Runtime Error:Segmentation fault
Runtime Error:Segmentation fault
Runtime Error:Segmentation fault
Runtime Error:Segmentation fault

这是怎么回事