Submission #1154093

#	Time	Username	Problem	Language	Result	Execution time	Memory
1154093		zhehan	Index (COCI21_index)	C++20	20 / 110	2594 ms	2228 KiB

index

#include <bits/stdc++.h>
using namespace std;

signed main()
{
    int n, q, l, r;
    cin >> n >> q;
    vector<int> p(n, 0);
    for (int i = 0; i < n; ++i)
    {
        cin >> p[i];
    }
    for (int i = 0; i < q; ++i)
    {
        cin >> l >> r;
        unordered_map<int, int> m;
        int nummax = 0;
        for (int i = l - 1; i < r; ++i)
        {
            m[p[i]]++;
            nummax = max(nummax,p[i]);
        }
        int t = 0;
        int maxh = 0;
        for (auto i = nummax; i >= 0; --i)
        {
            if (i <= m[i] + t)
            {
                maxh = i;
                break;
            }
            t += m[i];
        }
        cout << maxh << '\n';
    }
    return 0;
}

• Subtask 1: 20 / 20
• Subtask 2: 0 / 40
• Subtask 3: 0 / 50