CSP初赛复习-26-贪心算法-练习题

PDF及答案公众号回复关键字:CSPC26

完善程序：

#include <iostream>
using namespace std;
const int SIZE = 100;
int matrix[SIZE + 1][SIZE + 1];
int rowsum[SIZE + 1][SIZE + 1]; /* rowsum[i][j]记录第i行前j个数的和 */
int m, n, i, j, first, last, area, ans;
int main()
{
	cin >> m >> n;
	for ( i = 1; i <= m; i++ )
		for ( j = 1; j <= n; j++ )
			cin >> matrix[i][j];
	ans = matrix   ①;
	for ( i = 1; i <= m; i++ )
		②;
		for ( i = 1; i <= m; i++ )
			for ( j = 1; j <= n; j++ )
				rowsum[i][j] = ③;
	for ( first = 1; first <= n; first++ )
		for ( last = first; last <= n; last++ )
		{
			④;
			for ( i = 1; i <= m; i++ )
			{
				area += ⑤;
				if ( area > ans )
					ans = area;
				if ( area < 0 )
					area = 0;
			}
		}
	cout << ans << endl;
	return(0);
}