Submission #1228910

#	Time	Username	Problem	Language	Result	Execution time	Memory
1228910		pumkinhead	Bouquet (EGOI24_bouquet)	C++20	16 / 100	17 ms	1996 KiB

Main

#include <bits/stdc++.h>
using namespace std;
int main(){
    cin.tie(nullptr);
    ios_base::sync_with_stdio(false);
    int n;
    cin>>n;
    vector<int> tulips(n, INT_MAX);
    for(int i=0; i<n; i++){
        int l, r;
        cin>>l>>r;
        l = min(l, i);
        r = min(r, n-1-i);
        int newPos = i+r;
        int rangeExcluded = l+r;
        tulips[newPos] = min(rangeExcluded, tulips[newPos]);
    }
    vector<int> dp(n, 0);
    auto queryDp = [&](int pos){
        if(pos < 0) return -1;
        if(pos == 0) return 0;
        return dp[pos-1];
    };
    dp[0] = queryDp(-tulips[0]) + 1;
    for(int i=1; i<n; i++){
        dp[i] = dp[i-1];
        dp[i] = max(dp[i], queryDp(i - tulips[i]) + 1);
    }
    cout<<dp[n-1];
}

• Subtask 1: 0 / 8
• Subtask 2: 16 / 16
• Subtask 3: 0 / 28
• Subtask 4: 0 / 18
• Subtask 5: 0 / 30