oj.uz

답안 #790135

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
790135 2023-07-22T10:59:01 Z n3rm1n Stove (JOI18_stove) C++17
50 / 100
 1000 ms 1504 KB 
/// note: it's actually stove
#include<bits/stdc++.h>
#define endl '\n'
using namespace std;
const int MAXN = 1e5 + 10;
void speed()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
}
int n, k, a[MAXN];

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

vector < int > before(MAXN), dp(MAXN);
int inf = 1e9+10;
void divide(int l, int r, int opt_left, int opt_right)
{
    if(l > r)return;
    int mid = (l + r)/2;
    dp[mid] = inf;
    int best = inf, best_opt = -1;
    int cost;
    for (int cut = opt_left; cut <= min(mid, opt_right); ++ cut)
    {
        cost = before[cut-1] + a[mid] - a[cut] + 1;
        if(cost < best)
        {
            best = cost;
            best_opt = cut;
        }
    }
    dp[mid] = best;
    divide(l, mid-1, opt_left, best_opt);
    divide(mid+1, r, best_opt, opt_right);

}
void solve()
{
    dp[0] = 0;
    for (int i = 1; i <= n; ++ i)
        dp[i] = inf;
    for (int i = 1; i <= k; ++ i)
    {
        before = dp;
        divide(1, n, 1, n);
    }
    cout << dp[n] << endl;
}
int main()
{
    speed();

    read();
    solve();
    return 0;
}

Subtask #1
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 1108 KB Output is correct
2 Correct 1 ms 1108 KB Output is correct
3 Correct 1 ms 1108 KB Output is correct
4 Correct 1 ms 1108 KB Output is correct
5 Correct 1 ms 1108 KB Output is correct
6 Correct 1 ms 1108 KB Output is correct
7 Correct 1 ms 1108 KB Output is correct
8 Correct 1 ms 1108 KB Output is correct
9 Correct 1 ms 1108 KB Output is correct

Subtask #2
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 1108 KB Output is correct
2 Correct 1 ms 1108 KB Output is correct
3 Correct 1 ms 1108 KB Output is correct
4 Correct 1 ms 1108 KB Output is correct
5 Correct 1 ms 1108 KB Output is correct
6 Correct 1 ms 1108 KB Output is correct
7 Correct 1 ms 1108 KB Output is correct
8 Correct 1 ms 1108 KB Output is correct
9 Correct 1 ms 1108 KB Output is correct
10 Correct 2 ms 1108 KB Output is correct
11 Correct 8 ms 1108 KB Output is correct
12 Correct 82 ms 1116 KB Output is correct
13 Correct 115 ms 1108 KB Output is correct
14 Correct 148 ms 1108 KB Output is correct
15 Correct 154 ms 1112 KB Output is correct

Subtask #3
0 / 50.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 1108 KB Output is correct
2 Correct 1 ms 1108 KB Output is correct
3 Correct 1 ms 1108 KB Output is correct
4 Correct 1 ms 1108 KB Output is correct
5 Correct 1 ms 1108 KB Output is correct
6 Correct 1 ms 1108 KB Output is correct
7 Correct 1 ms 1108 KB Output is correct
8 Correct 1 ms 1108 KB Output is correct
9 Correct 1 ms 1108 KB Output is correct
10 Correct 2 ms 1108 KB Output is correct
11 Correct 8 ms 1108 KB Output is correct
12 Correct 82 ms 1116 KB Output is correct
13 Correct 115 ms 1108 KB Output is correct
14 Correct 148 ms 1108 KB Output is correct
15 Correct 154 ms 1112 KB Output is correct
16 Correct 31 ms 1492 KB Output is correct
17 Correct 201 ms 1504 KB Output is correct
18 Execution timed out 1073 ms 1492 KB Time limit exceeded
19 Halted 0 ms 0 KB -