Submission #535876

#	Time	Username	Problem	Language	Result	Execution time	Memory
535876		ammar2000	Martian DNA (BOI18_dna)	C++17	0 / 100	29 ms	4712 KiB

dna

#include<bits/stdc++.h>
#define ll long long
#define pb push_back
#define F first
#define S second
#define coy cout<<"YES\n"
#define con cout<<"NO\n"
#define co1 cout<<"-1\n"
#define sc(x) scanf("%lld",&x)
#define all(x) x.begin(),x.end()
#define fast ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
using namespace std;
const int SI=3e5+7;
ll INF=8e18+7;
int dx[] = {1 , -1 , 0 , 0};
int dy[] = {0 , 0 , 1 , -1};
int MOD=1e9+7;
ll n,k,r;
ll a[SI],w[SI],c[SI];
ll st;
int main()
{
   fast
   cin>>n>>k>>r;
   for (int i=0;i<n;i++)
    cin>>a[i];
   for (int i=0;i<r;i++)
   {
     ll x,y;
     cin>>x>>y;
     w[x]=y;
     st++;
   }
   ll f=0,s=0,ans=INF;
   while (f<n&&s<n)
   {
       while (s<n&&st)
       {
          c[a[s]]++;
          if (c[a[s]]==w[a[s]])
            st--;
          s++;
       }
       //cout<<f<<" "<<s<<"\n";
       if (s==n&&st)
        break;
       ans=min(ans,s-f);
       if (c[a[f]]==w[a[f]])
        st++;
       c[a[f++]]--;
   }
   if (ans==INF)
    cout <<"impossible\n";
   else cout <<ans;
   // use scanf not cin
   return 0;
}

/*
5 2 2
0 1 1 0 1
0 1
1 1
*/

• Subtask 1: 0 / 16
• Subtask 2: 0 / 24
• Subtask 3: 0 / 28
• Subtask 4: 0 / 32