Submission #835051

#	Time	Username	Problem	Language	Result	Execution time	Memory
835051		jasmin	Stone Arranging 2 (JOI23_ho_t1)	C++17	100 / 100	154 ms	21456 KiB

Main

//JOI 2023 Final Round
#include<bits/stdc++.h>
using namespace std;
#define int long long

signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);

    int n;
    cin >> n;
    vector<int> a(n);
    for(int i=0; i<n; i++){
        cin >> a[i];
    }

    vector<int> stack;
    stack.push_back(-1);
    map<int,int> cnt;
    for(int i=0; i<n; i++){
        cnt[a[i]]++;

        if(cnt[a[i]]==1){
            stack.push_back(i);
            continue;
        }

        while(!stack.empty() && a[stack.back()]!=a[i]){
            cnt[a[stack.back()]]--;
            stack.pop_back();
        }

        stack.push_back(i);
    }

    vector<int> col(n);
    int s=stack.size();
    for(int i=s-1; i>0; i--){

        for(int j=stack[i]; j>stack[i-1]; j--){
            col[j] = a[stack[i]];
        }
    }
    for(auto e: col){
        cout << e << "\n";
    }
}

• Subtask 1: 25 / 25
• Subtask 2: 35 / 35
• Subtask 3: 40 / 40