Submission #1013777

#	Time	Username	Problem	Language	Result	Execution time	Memory
1013777		vjudge1	Martian DNA (BOI18_dna)	C++17	0 / 100	2063 ms	8532 KiB

dna

#include <bits/stdc++.h>
#define ll long long
#define pii pair<int, int>
using namespace std;

const int N = 2e5+5, INF = 1e9;

int n, k, rr;
int a[N];
int q[N];

int cur[N];

int main()
{
	ios::sync_with_stdio(0),cin.tie(0),cout.tie(0);
	cin >> n >> k >> rr;
	for (int i = 1; i <= n; cin >> a[i++]);
	for (int i = 1, b; i <= rr; cin >> b >> q[b], i++);
	int sat = (q[a[1]] && ++cur[a[1]] == q[a[1]]);
	int l = 1, r = 1;
	int sol = INF;
	while (r < n) {
		cerr << sat << ": " << l << ' ' << r << endl;
		if (sat == rr && l < r) {
			sol = min(sol, r-l+1);
			cur[a[l]]--;
			if (q[a[l]] && cur[a[l]] == q[a[l]]-1) sat--;
			l++;
		} else {
			r++;
			cur[a[r]]++;
			if (q[a[r]] && cur[a[r]] == q[a[r]]) sat++;
		}
	}
	while (l <= n && sat == rr) {
		sol = min(sol, r-l+1);
		cur[a[l]]--;
		if (q[a[l]] && cur[a[l]] == q[a[l]]-1) break;
		l++;
	}
	cout << (sol == INF ? "impossible" : to_string(sol));
}

• Subtask 1: 0 / 16
• Subtask 2: 0 / 24
• Subtask 3: 0 / 28
• Subtask 4: 0 / 32