Submission #1278011

#	Time	Username	Problem	Language	Result	Execution time	Memory
1278011		namhh	Cigle (COI21_cigle)	C++20	100 / 100	225 ms	134396 KiB

cigle

#include <bits/stdc++.h>
using namespace std;
#define pii pair<int,int>
#define fi first
#define se second
const int N = 5e3+5;
int n,a[N],dp[N][N],pre[N][N];
signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cin >> n;
    for(int i = 1; i <= n; i++) cin >> a[i];
    for(int i = 2; i <= n; i++){
		int l = i-1;
		int cur1 = 0;
		int cur2 = 0;
		int cnt = 0;
		for(int j = i; j <= n; j++){
			dp[i][j] = max(dp[i][j-1],pre[i-1][l]+cnt);
			cur1 += a[j];
			while(cur2 < cur1 && l > 1){
				cur2 += a[l];
				l--;
			}
			if(cur1 == cur2) cnt++;
		}
		for(int j = 1; j <= i; j++) pre[i][j] = max(pre[i][j-1],dp[j][i]);
	}
	int ans = 0;
	for(int i = 1; i <= n; i++) ans = max(ans,dp[i][n]);
	cout << ans;
}

• Subtask 1: 9 / 9
• Subtask 2: 11 / 11
• Subtask 3: 13 / 13
• Subtask 4: 15 / 15
• Subtask 5: 52 / 52