Submission #947987

#	Time	Username	Problem	Language	Result	Execution time	Memory
947987		Zena_Hossam	Martian DNA (BOI18_dna)	C++14	100 / 100	379 ms	28284 KiB

dna

#include <bits/stdc++.h>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/assoc_container.hpp>
#define ll long long
using namespace std;
#define fi ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
//#define ll double

#define ll1 long long
#define F first
#define S second
#define sz size()
#define all(s) s.begin(),s.end()
#define all1(s) s.rbegin(),s.rend()
int main()
{
    //freopen("stdin.in","r",stdin);freopen("stdout.out","w",stdout);
    int T=1;
    //cin>>T;ll oo=0;
    while(T--)
    {
        ll n,k,z;
        cin>>n>>k>>z;
        ll arr[n];
        for(ll i=0;i<n;i++){
            cin>>arr[i];
        }
        map<ll,ll>m,d;
        for(ll i=0;i<z;i++){
            ll a,b;
            cin>>a>>b;
            m[a]=b;
        }ll c=k-z;ll mn=1e18;ll o=0;
        for(ll i=0;i<n;i++){
           d[arr[i]]++;
            if(d[arr[i]]==m[arr[i]])c++;
            while(c==k){//cout<<i<<" "<<o<<"\n";
                mn=min(mn,(i-o+1));d[arr[o]]--;
                if(d[arr[o]]<m[arr[o]])c--;
                o++;

            }
        }
        if(mn==1e18)cout<<"impossible";
        else
        cout<<mn;
    }
}

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