Submission #1184004

#	Time	Username	Problem	Language	Result	Execution time	Memory
1184004		alterio	Martian DNA (BOI18_dna)	C++20	100 / 100	19 ms	2632 KiB

dna

#include <bits/stdc++.h>

using namespace std;

#define endl '\n'
#define ll long long
#define all(x) (x).begin(), (x).end()

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int n, k, R;
    cin >> n >> k >> R;
    vector<int> v(n);
    for (int i = 0; i < n; i++) cin >> v[i];
    vector<int> cnt(k, -1), have(k);
    for (int i = 0; i < R; i++) {
        int type, need;
        cin >> type >> need;
        cnt[type] = need;
    }
    int ok = 0, r = 0, ans = 1e9;
    for (int i = 0; i < n; i++) {
        while (r < n && ok != R) {
            have[v[r]]++;
            if (have[v[r]] == cnt[v[r]]) ok++;
            r++;
        }
        if (ok == R) ans = min(ans, r - i);
        if (have[v[i]] == cnt[v[i]]) ok--;
        have[v[i]]--;
    }
    if (ans == 1e9) cout << "impossible";
    else cout << ans;
}

• Subtask 1: 16 / 16
• Subtask 2: 24 / 24
• Subtask 3: 28 / 28
• Subtask 4: 32 / 32