Submission #520610

#	Time	Username	Problem	Language	Result	Execution time	Memory
520610		kartel	Cigle (COI21_cigle)	C++14	0 / 100	1 ms	316 KiB

cigle

#include <bits/stdc++.h>
//#include<ext/rope>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>

//#pragma GCC optimize("Ofast")
//#pragma GCC optimize("unroll-loops")
//#pragma GCC optimize("-O3")
//#pragma GCC target("avx2")


#define in(x) freopen(x, "r", stdin)
#define out(x) freopen(x, "w", stdout)
#define F first
#define S second
#define pb push_back
#define sz(x) int(x.size())
#define el '\n'
#define all(x) x.begin(), x.end()

using namespace std;
//using namespace __gnu_pbds;
//using  namespace __gnu_cxx;

typedef long long ll;
typedef long double ld;
typedef short int si;
typedef unsigned long long ull;
//typedef tree <ll, null_type, less <ll> , rb_tree_tag, tree_order_statistics_node_update> ordered_set;

const int N = 5005;

int n, f[N], a[N];
int pf[N];

int main()
{
//    cerr.precision(7);
//    cerr << fixed;
    ios_base::sync_with_stdio(0); istream::sync_with_stdio(0); cin.tie(0); cout.tie(0);
//    in("23.in");
//    in("input.txt");
//    out("output.txt");
//    clock_t start = clock();

    cin >> n;
    for (int i = 1; i <= n; i++) {
        cin >> a[i];
    }

//    for (int i = 0; i <= n; i++) {
        for (int j = 0; j <= n; j++) {
            f[j] = -1e9;
        }
//    }
//    for (int i = 1; i <= n; i++) {
//        f[1][i] = 0;
//    }
    f[1] = 0;
//    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= n; j++) {
//            sum_now += a[j];
            pf[j] = max(pf[j - 1], f[j]);
            int pj = j;
            int sum = 0;
            int sum_was = 0;
            int cnt = 0;
            int mx = 0;
            for (int k = j + 1; k <= n; k++) {
                sum += a[k];
                while (pj >= 1 && sum_was < sum) {
                    sum_was += a[pj];
                    pj--;
                }
//                if (j + 1 == 9 && k == 12) {
//                    cout << i << " " << j << " " << f[i][j] + cnt << el;
//                }
                if (sum_was == sum) {
                    cnt++;
                    mx = max(mx, pf[pj - 1] + cnt);
                }
                f[k] = max({f[k], mx, pf[j]});
            }
        }
//    }
//    int ans = 0;
    cout << f[n];
}

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