제출 #1290907

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1290907		hmms127	Martian DNA (BOI18_dna)	C++20	0 / 100	189 ms	9824 KiB

dna

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
template<typename key>
// for ordered set or indexed set
#define f1(n) for(int i=0;i<n;i++)
#define e '\n'
#define f2(m,n,q) for(int i=m;i<n;i+=q)
#define f3(n) for(int j=0;j<n;j++)
#define f4(m,n,q) for(int j=m;j<n;j+=q)
#define speed ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0)
#define pb push_back
#define int long long
//f^=1 == if(f==0)f=1 else f=0
const int N=2e5+5;
const int mod=1e9+7;
const int inf=1e9,sqr=448;
bool valid(int frq[],map<int,int>mp){
    for(auto it:mp){
        if(frq[it.first]<it.second)return false;
    }
    return true;
}
int32_t main()
{
     speed;
     int tt=1;//cin>>tt;
     while(tt--){
        //freopen("teamwork.in","r",stdin);
        //freopen("teamwork.out","w",stdout);
        int n,k,r;cin>>n>>k>>r;
        int a[n];f1(n)cin>>a[i];
        map<int,int>mp;
        pair<int,int>pr[r];f1(r)cin>>pr[i].first>>pr[i].second,mp[pr[i].first]=pr[i].second;
        int ans=inf,r1=0,l=0,cnt=0;int frq[n+1]={};
        while(r1<n){
            frq[a[r1]]++;
            if(mp.count(a[r1]))cnt+=(frq[a[r1]]==mp[a[r1]]);
            while(l<=r&&cnt==r){
                if(mp.count(a[l])==0){l++;continue;}
                frq[a[l]]--;
                cnt-=(frq[a[l]]<mp[a[l]]);
                if(cnt<r){frq[a[l]]++;cnt++;break;}
                else l++;
            }
            if(cnt==r)ans=min(ans,r1-l+1);
            r1++;
        }
        if(ans==inf)cout<<"impossible";
        else cout<<ans;
     }
}

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