Submission #314018

#	Time	Username	Problem	Language	Result	Execution time	Memory
314018		sofapuden	Martian DNA (BOI18_dna)	C++14	100 / 100	38 ms	2688 KiB

dna

#include <bits/stdc++.h>

using namespace std;

int main(){
	ios_base::sync_with_stdio(0); cin.tie(0);
	int n, k, r; cin >> n >> k >> r;
	vector<int> v(n);
	for(auto &x : v)cin >> x;
	vector<int> ha(k,0), wa(k,0);
	for(int i = 0; i < r; ++i){
		int a, b; cin >> a >> b;
		wa[a] = b;
	}
	int l = -1, ri = -1, go = 0, best = 1<<30;
	while(++ri < n){
		ha[v[ri]]++;
		if(ha[v[ri]] == wa[v[ri]])go++;
		if(go == r){
			while(go == r){
				++l;
				ha[v[l]]--;
				if(ha[v[l]] == wa[v[l]]-1)go--;
			}
			best = min(best,ri-l+1);
		}
	}
	cout << (best == (1<<30) ? "impossible" : to_string(best)) << "\n";
		
		
	
}

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