Submission #1281898

#	Time	Username	Problem	Language	Result	Execution time	Memory
1281898		ender_shayan	Martian DNA (BOI18_dna)	C++20	100 / 100	26 ms	1876 KiB

dna

#include <bits/stdc++.h>

using namespace std;

// #include <ext/pb_ds/assoc_container.hpp>
// #include <ext/pb_ds/tree_policy.hpp>
// using namespace __gnu_pbds;

typedef long long ll;
typedef long double	ld;
typedef pair<int, int>	pii  ;
typedef pair<ll, ll>	pll  ;
typedef vector<pii>     vii  ;
typedef vector<int>     veci ;
typedef vector<pll>     vll  ;
typedef vector<ll>      vecll;

// find_by_order             order_of_key

//#pragma GCC optimize("O3,unroll-loops")
//#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
#define ordered_set tree<int, null_type,less<int>, rb_tree_tag,tree_order_statistics_node_update>
#define F		        first
#define S		        second
#define pb		        push_back
#define endl            '\n'
#define Mp		        make_pair
#define all(x)          x.begin(), x.end()
#define debug(x)        cerr << #x << " = " << x << endl
#define set_dec(x)	    cout << fixed << setprecision(x);
#define fast_io         ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define file_io         freopen("in.txt" , "r" , stdin) ; freopen("out.txt" , "w" , stdout);
#define lb              lower_bound
#define ub              upper_bound
#define for1(n)         for(int i=1;i<=n;i++)
#define for0(n)         for(int i=0;i<n;i++)
#define forn(n)         for(int i=n;i>0;i--)
#define pq              priority_queue <pii, vector<pii>, greater<pii>>


const ll mod = 1e9+7 ;// 998244353 ;// 1e9+9;

ll inf=1e18;
const int N=1e6+100,L=21,bs=701;
int A[N],B[N],C[N],D[N],E[N],n,m,k,q,dp[N],pre[N],dist[N],cnt[N];
vector<int>g[N];


int main(){
    fast_io
    cin>>n>>k>>q;
    for1(n)cin>>A[i];
    for1(q){
        int a,b;cin>>a>>b;
        cnt[a]=max(cnt[a],b);
    }
    int r=1,ans=N;
    for(int i=0;i<=k;i++){
        while(cnt[i]>0 && r<=n+1){
            cnt[A[r]]--;
            r++;
        }
    }
    if(r==n+2)return cout<<"impossible\n",0;
    ans=r-1;
    for(int i=2;i<=n;i++){
        cnt[A[i-1]]++;
        while(cnt[A[i-1]]>0 && r<=n+1){
            cnt[A[r]]--;
            r++;
        }
        if(r<=n+1)ans=min(ans,r-i);
    }
    cout<<ans<<endl;


}

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