제출 #930496

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
930496		Regulus	Global Warming (CEOI18_glo)	C++17	15 / 100	36 ms	604 KiB

glo

#include <bits/stdc++.h>
#define IO ios::sync_with_stdio(false);cin.tie(0);
#define debug(x) cerr << #x << " = " << (x) << ' '
#define bug(x) cerr << (x) << ' '
#define endl cerr << '\n'
#define all(v) (v).begin(), (v).end()
#define SZ(v) (ll)(v).size()
#define lowbit(x) (x)&-(x)
#define pb emplace_back
#define F first
#define S second
using namespace std;
using ll = long long;
using pll = pair<ll, ll>;
//#define TEST

const int N = 55;
int a[N], b[N];
vector<int> v;

int main(void)
{ IO
    int n, i, ans=0, j, x;

    cin >> n >> x;
    if (n > 50 || x > 50) assert(0);
    for (i=1; i <= n; ++i) cin >> a[i];

    for (i=1; i <= n; ++i)
    {
        for (int j=i; j <= n; ++j)
        {
            for (int d=-x; d <= x; ++d)
            {
                v.clear();
                for (int k=1; k <= n; ++k)
                {
                    b[k] = a[k];
                    if (i <= k && k <= j) b[k] += d;
                    if (v.empty() || b[k] > v.back()) v.pb(b[k]);
                    else *lower_bound(all(v), b[k]) = b[k];
                }
                ans = max(ans, (int)SZ(v));
            }
        }
    }

    cout << ans << '\n';

    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

glo.cpp: In function 'int main()':
glo.cpp:23:22: warning: unused variable 'j' [-Wunused-variable]
   23 |     int n, i, ans=0, j, x;
      |                      ^

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 0 / 13
• Subtask 4: 0 / 10
• Subtask 5: 0 / 20
• Subtask 6: 0 / 17
• Subtask 7: 0 / 25