Submission #758085

#	Time	Username	Problem	Language	Result	Execution time	Memory
758085		vjudge1	Money (IZhO17_money)	C++17	0 / 100	1 ms	212 KiB

money

#include"bits/stdc++.h"
using namespace std;
#define ll long long
const ll mod = 1000000007;

int b[1000001];

signed main() {
    ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);

    int n;
    cin >> n;
    int a[n];
    for(int i = 0; i < n; i++)
        cin >> a[i];
    int ans = n;
    for(int i = 0; i <= (1 << n); i++) {
        b[1] = 1e6;
        set<int> s;
        s.insert(-1);
        bool bad = 0;
        int cur = 0;
        for(int j = 0; j < n; j++) {
            int l = j, r;
            for(int k = j; k < n; k++) {
                r = k;
                if(i & (1 << k))
                    break;
                if(k - 1 >= j && a[k] < a[k - 1])
                    bad = 1;
            }
            int g = *s.lower_bound(-a[j]) * -1;
            if(a[r] > b[g])
                bad = 1;
            if(bad)
                break;
            b[a[r]] = b[g];
            b[g] = a[l];
            s.insert(-a[r]);
            s.insert(-g);
            for(int k = l; k < r; k++) {
                b[a[k]] = a[k + 1];
                s.insert(-a[k]);
            }
            cur++;
            j = r;
        }
        if(!bad)
            ans = min(ans, cur);
        while(s.size()) {
            b[*s.begin()] = 0;
            s.erase(s.begin());
        }
    }
    cout << ans;

    return 0;
}

• Subtask 1: 0 / 9
• Subtask 2: 0 / 16
• Subtask 3: 0 / 20
• Subtask 4: 0 / 55