Submission #497378

#	Time	Username	Problem	Language	Result	Execution time	Memory
497378		Ierus	Bigger segments (IZhO19_segments)	C++17	13 / 100	994 ms	328 KiB

segments

#include<bits/stdc++.h>
using namespace std;
#pragma GCC optimize ("unroll-loops,Ofast,O3")
#pragma GCC target("avx,avx2,fma")
#define F first
#define S second
#define int long long
#define sz(x) (int)x.size()
#define pb push_back
#define eb emplace_back
#define all(x) (x).begin(),(x).end()
const int E = 5e5+777;
const long long inf = 1e18+777;
const int N = 3e3+777;
const int MOD = 1e9+7;
int n, a[E], pref[E];
int get(int l, int r){
    return pref[r] - pref[l-1];
}
signed main(){
    ios_base::sync_with_stdio(0),
    cin.tie(0),cout.tie(0);
    cin >> n;
    for(int i = 1; i <= n; ++i){
        cin >> a[i];
        pref[i] = pref[i-1] + a[i];
    }
    int res = 0;
    for(int mask = 0; mask < (1 << n); ++mask){
        vector<int> v;
        for(int a = 0; a < n; ++a){
            if((mask >> a) & 1){
                v.pb(a + 1);
            }
        }
        int last = 0, ans = 0, w = 0;
        bool ok = true;
        for(int x : v){
            if(w <= get(last + 1, x)){
                ans++;
            }else{
                ok = false;
                break;
            }
            w = get(last + 1, x);
            last = x;
        }
        if(ok){
//            if(res < ans){
//                cerr << "ANS: " << ans << '\n';
//                for(auto it : v){
//                    cerr << it << ' ';
//                }cerr << '\n';
//            }
            res = max(res, ans);
        }
    }
    cout << res;
}

• Subtask 1: 13 / 13
• Subtask 2: 0 / 14
• Subtask 3: 0 / 10
• Subtask 4: 0 / 36
• Subtask 5: 0 / 27