Submission #8382

#	Time	Username	Problem	Language	Result	Execution time	Memory
8382		ainta	On grid (kriii2_O)	C++98	4 / 4	72 ms	2216 KiB

O

#include<stdio.h>
#include<algorithm>
using namespace std;
int D[2][310][310], n, m, S[310][310], pv, D2[2][310];
int main()
{
	int i, j, k;
	scanf("%d%d", &n,&m);
	for (i = 1; i <= n; i++){
		for (j = 1; j <= m; j++){
			scanf("%d", &S[i][j]);
			S[i][j] += S[i][j - 1];
		}
	}
	for (i = 1; i <= m; i++){
		D2[0][i] = D[0][i][i] = S[1][i];
		for (j = 1; j < i; j++)D[0][i][j] = -1999999999;
	}
	for (i = 2; i <= n; i++){
		for (j = 1; j <= m; j++)D2[!pv][j] = -1999999999;
		D2[pv][0] = -1999999999;
		for (j = 1; j <= m; j++){
			for (k = 1; k <= j; k++){
				D[!pv][j][k] = max(D[pv][j][k], D2[pv][j - k]) + S[i][j] - S[i][j - k];
				D2[!pv][j] = max(D2[!pv][j], D[!pv][j][k]);
			}
		}
		pv = !pv;
	}
	printf("%d\n", D2[pv][m]);
}

• Subtask 1: 1 / 1
• Subtask 2: 3 / 3