Submission #448549

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
448549	2021-07-30 13:35:05	Edbert2397	Martian DNA (BOI18_dna)	C++14	100 / 100	72 ms	4476 KiB

dna

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/*
~2021~
*/
# include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define mp make_pair
#define fi first
#define se second
typedef long long ll;
#define pii pair<int,int>
#define debug(x) cout << #x << '=' << x << endl;
const int N = 2e5 + 5;
const int INF = 1e9;
const ll mod = 1e9+7;
int need[N],arr[N],n,k,q,byk[N];
bool valid(int x){
    for(int i = 0;i<k;i++) byk[i] = 0;
    int cnt = 0;
    for(int i = 1;i<=n;i++){
        if(i > x){
            if(byk[arr[i-x]] == need[arr[i-x]]) cnt--;
            byk[arr[i-x]]--;
        }
        byk[arr[i]]++;
        if(byk[arr[i]] == need[arr[i]]) cnt++;
        if(cnt == q) return true;
    }
    return false;
}
 
 
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• Subtask 1: 16 / 16
• Subtask 2: 24 / 24
• Subtask 3: 28 / 28
• Subtask 4: 32 / 32