Submission #932576

#	Time	Username	Problem	Language	Result	Execution time	Memory
932576		imarn	Martian DNA (BOI18_dna)	C++14	100 / 100	62 ms	16940 KiB

dna

#include<bits/stdc++.h>
#define ll long long
#define pii pair<int,int>
#define pll pair<ll,ll>
#define f first
#define s second
#define pb push_back
#define all(x) x.begin(),x.end()
#define vi vector<int>
#define vvi vector<vi>
#define vp vector<pii>
using namespace std;
const int N=2e5+5;
unordered_map<ll,int>mp,up;
ll a[N];
int main(){
    ios_base::sync_with_stdio(0);cin.tie(0);
    int n,k,R;cin>>n>>k>>R;
    for(int i=0;i<n;i++)cin>>a[i],mp[a[i]]=0;
    for(int i=0;i<R;i++){
        ll b,q;cin>>b>>q;up[b]=q;
    }int cnt=0;int l=0,ans=1e9;
  	for(int i=0;i<n;i++){mp[a[i]]++;if(up.find(a[i])!=up.end()&&mp[a[i]]==up[a[i]])cnt++;
      while(up.find(a[l])==up.end()||(cnt==R&&mp[a[l]]>up[a[l]]))mp[a[l]]--,l++;
      if(cnt==R)ans=min(ans,i-l+1);
    }
    if(ans==1e9)cout<<"impossible";
  	else cout<<ans;
}

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