oj.uz

답안 #345627

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
345627 2021-01-07T16:59:58 Z vonatlus Bigger segments (IZhO19_segments) C++14
0 / 100
 1 ms 364 KB 
#include <bits/stdc++.h>
 
#define all(x) x.begin(), x.end()
 
#define y second
#define x first
 
using namespace std;
 
using ll = long long;
using pii = pair<ll, ll>;
 
const int N = 5e5+10;

void fin() {
#ifdef AM
    freopen(".in", "r", stdin);
#endif        
}                   

ll p[N], a[N];

pii dp[N];

int main() {  
    ios_base::sync_with_stdio(0);               
    cin.tie(nullptr), fin();                                               
    int n;
    cin >> n;
    for (int i = 1; i <= n; i++) cin >> a[i];
    for (int i = 1; i <= n; i++) p[i] += p[i - 1] + a[i];
    stack<pair<ll, ll>> s;
    s.push({0, 0});
    for (int i = 1; i <= n; i++) {
        while (!s.empty() && dp[s.top().x].y + s.top().y <= p[i]) {
            if (dp[s.top().x].x+1 == dp[i].x) {
                dp[i].y = min(dp[i].y, s.top().y);
            }
            if (dp[s.top().x].x+1 > dp[i].x) {
                dp[i] = pii{dp[s.top().x].x+1, p[i]-s.top().y};
            }
            s.pop();
        } 
        s.push({i, p[i]});
    }
    cout << dp[n].x;
    return 0;                   
}

Subtask #1
0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Incorrect 1 ms 364 KB Output isn't correct
7 Halted 0 ms 0 KB -

Subtask #2
0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Incorrect 1 ms 364 KB Output isn't correct
7 Halted 0 ms 0 KB -

Subtask #3
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Incorrect 1 ms 364 KB Output isn't correct
7 Halted 0 ms 0 KB -

Subtask #4
0 / 36.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Incorrect 1 ms 364 KB Output isn't correct
7 Halted 0 ms 0 KB -

Subtask #5
0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Incorrect 1 ms 364 KB Output isn't correct
7 Halted 0 ms 0 KB -