Submission #606781

#	Time	Username	Problem	Language	Result	Execution time	Memory
606781		ntmp	Martian DNA (BOI18_dna)	C++14	100 / 100	291 ms	11812 KiB

dna

#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n,k,r;
    cin>>n>>k>>r;
    int a[n+1];
    map<int,int> mp;
    for(int i=0;i<n;i++)
        cin>>a[i];
    for(int i=0;i<r;i++)
    {
        int x,y;
        cin>>x>>y;
        mp[x]=y;
    }
    int bad=r;
    int res=n+1,vt=0,j=0;
    for(int i=0;i<n;i++)
    {
        /*for(int j=vt;j<n;j++)
        if(bad>0)
        {
            //cout<<i<<' '<<j<<endl;
            mp[a[j]]--;
            if(mp[a[j]]==0) bad--;
        }
        else
        {
            cout<<j<<' '<<i<<endl;
            vt=j;
            res=min(res,j-i);
            break;
        }*/
        while(j<n && bad>0)
        {
            mp[a[j]]--;
            if(mp[a[j]]==0) bad--;
            j++;
        }
        if(bad==0) res=min(res,j-i);
        mp[a[i]]++;
        if(mp[a[i]]==1) bad++;
    }
    if(res==n+1) cout<<"impossible"<<endl;
    else cout<<res<<endl;
}

Compilation message (stderr)

dna.cpp: In function 'int main()':
dna.cpp:18:17: warning: unused variable 'vt' [-Wunused-variable]
   18 |     int res=n+1,vt=0,j=0;
      |                 ^~

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