Submission #959319

#	Time	Username	Problem	Language	Result	Execution time	Memory
959319		gmroh06	빌딩 장식 3 (JOI15_building3)	C++14	100 / 100	79 ms	14928 KiB

building3

#import <bits/stdc++.h>

using namespace std;
using ll = long long;
using pll = pair<ll, ll>;

inline void fastio() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
}

ll n, ans = 1, cnt, loc;
vector<ll> arr;

int main() {
    fastio();

    cin >> n;

    arr.resize(n);

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

    for (ll i = 0, h = 0; i < n; i++) {
        if (arr[i] - h > 2) {
            cout << 0 << '\n';
            return 0;
        } else if (arr[i] - h == 2) {
            if (cnt) {
                cout << 0 << '\n';
                return 0;
            } else {
                cnt = arr[i];
                loc = i;
            }
        }

        h = max(h, arr[i]);
        ans += h;
    }

    if (cnt) {
        for (ll i = 0; i < loc; i++) {
            if (arr[i] + 2 == cnt) {
                ans = loc - i;
                break;
            }
        }
    }

    cout << ans << '\n';

    return 0;
}

Compilation message (stderr)

building3.cpp:1:2: warning: #import is a deprecated GCC extension [-Wdeprecated]
    1 | #import <bits/stdc++.h>
      |  ^~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 30 / 30
• Subtask 3: 60 / 60