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답안 #343118

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
343118 2021-01-03T12:26:55 Z apostoldaniel854 등산 경로 (IZhO12_route) C++14
100 / 100
 240 ms 26080 KB 
#include <bits/stdc++.h>

using namespace std;

#define pb push_back
#define dbg(x) cerr << #x << " " << x << "\n"
using ll = long long;

const int MAX_N = 1e6;
int a[MAX_N], h[1 + MAX_N];
int stk[1 + MAX_N + 1];


int main () {
    ios::sync_with_stdio (false);
    cin.tie (0); cout.tie (0);

    int n, k;
    cin >> n >> k;
    for (int i = 0; i < n; i++)
        cin >> a[i];
    int mx = 0;
    for (int i = 0; i < n; i++)
        if (a[mx] < a[i])
            mx = i;
    int nr = 0;
    for (int i = mx; i < n; i++)
        h[nr++] = a[i];
    for (int i = 0; i < mx; i++)
        h[nr++] = a[i];
    h[nr] = a[mx]; /// [0...n] h[0] = h[n] = a[mx]
    int vf = 0;
    priority_queue <pair <int, int>> gaps;
    for (int i = 0; i <= n; i++) {
        while (vf && h[stk[vf]] < h[i]) {
            vf--;
            gaps.push ({-(i - stk[vf] - 1), h[stk[vf + 1]] - min (h[i], h[stk[vf]])});
        }
        stk[++vf] = i;
    }
    int ans = 0;
    ///dbg (n);
    while (gaps.size ()) {
        int length = -gaps.top ().first;
        int heigth = -gaps.top ().second;
      ///  dbg (length);
        gaps.pop ();
        int taken = min (k / length, heigth);
        k -= taken * length;
        ans += taken * 2;
    }
    cout << ans << "\n";
    return 0;
}

Subtask #1
100.0 / 100.0

# 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 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 492 KB Output is correct
10 Correct 23 ms 3180 KB Output is correct
11 Correct 31 ms 3308 KB Output is correct
12 Correct 23 ms 3436 KB Output is correct
13 Correct 240 ms 26080 KB Output is correct
14 Correct 228 ms 26080 KB Output is correct
15 Correct 231 ms 24160 KB Output is correct
16 Correct 220 ms 25052 KB Output is correct
17 Correct 216 ms 25056 KB Output is correct
18 Correct 223 ms 25976 KB Output is correct
19 Correct 226 ms 26080 KB Output is correct
20 Correct 216 ms 24288 KB Output is correct