Submission #560423

#	Time	Username	Problem	Language	Result	Execution time	Memory
560423		Yazan_Alattar	Cigle (COI21_cigle)	C++14	13 / 100	3 ms	2844 KiB

cigle

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
#define F first
#define S second
#define pb push_back
#define endl "\n"
#define all(x) x.begin(), x.end()
const int M = 5007;
const ll inf = 1e18;
const ll mod = 1e9 + 7;
const double pi = acos(-1);
const double eps = 1e-6;
const int dx[] = {0, -1, 0, 1}, dy[] = {1, 0, -1, 0};
const int block = 320;

int n, a[M], dp[M][M], ans;

int main(){
    ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin >> n;
    for(int i = 1; i <= n; ++i) cin >> a[i];

    for(int i = 1; i <= n; ++i){
        for(int j = 1; j < i; ++j){
            if(i > 1) dp[j][i - 1] = max(dp[j][i - 1], dp[j][i - 2]);
            dp[j][i - 1] = max(dp[j][i - 1], dp[j - 1][i - 1]);
        }

        int lenk = 0, lenj = 0, k = i - 1, cnt = 0;

        for(int j = i; j <= n; ++j){
            lenj += a[j];
            while(k > 1  && lenk < lenj) lenk += a[k--];
            if(lenj == lenk) ++cnt;

            dp[i][j + 1] = max(dp[i][j + 1], dp[k][i - 1] + cnt);
        }
    }

    for(int i = 1; i <= n; ++i) ans = max(ans, dp[i][n]);
    cout << ans << endl;
    return 0;
}

• Subtask 1: 0 / 9
• Subtask 2: 0 / 11
• Subtask 3: 13 / 13
• Subtask 4: 0 / 15
• Subtask 5: 0 / 52