Submission #960940

#	Time	Username	Problem	Language	Result	Execution time	Memory
960940		batsukh2006	Martian DNA (BOI18_dna)	C++17	100 / 100	35 ms	6752 KiB

dna

#include<iostream>
#include<stdio.h>
#include<math.h>
#include<map>
#include<string>
#include<algorithm>
#include<vector>
#include<string.h>
#include<utility>
#include<set>
#include<cmath>
#include<queue>
#include<deque>
#include<functional>
#include<stack>
#include<limits.h>
#include<iomanip>
#include<unordered_map> 
#include<numeric>
#include<tuple>
#include<bitset>
using namespace std;
 
#define MOD 1000000007
#define int long long
#define ss second
#define ff first
#define endl '\n'
typedef pair<int,int> pp;
signed main(){
    // freopen("file.in", "r", stdin);
    // freopen("file.out", "w", stdout);
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    
    int n,k,r; cin>>n>>k>>r;
    vector<int> a(n+1),mp(k+1,-1),fq(k+1);
    for(int i=1; i<=n; i++) cin>>a[i];
    for(int i=1; i<=r; i++){
    	int b,q; cin>>b>>q;
    	mp[b]=q;
    }
    int ans=1e18,sum=0;
    for(int i=1,j=1; i<=n; i++){
    	fq[a[i]]++;
    	if(fq[a[i]]==mp[a[i]]&&mp[a[i]]!=-1) sum++;
    	while(sum==r){
    		ans=min(ans,i-j+1);
    		fq[a[j]]--;
    		if(fq[a[j]]<mp[a[j]]&&mp[a[j]]!=-1) sum--;
    		j++;
    	}
    }
    if(ans==1e18) cout<<"impossible";
    else cout<<ans;
    return 0;
}

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