Submission #248773

#	Time	Username	Problem	Language	Result	Execution time	Memory
248773		Sorting	Lottery (CEOI18_lot)	C++14	100 / 100	1219 ms	25720 KiB

lot

#include <bits/stdc++.h>

using namespace std;

const short k_N = 1e4 + 3;
const short k_Q = 1e3 + 3;

int n, l;
int a[k_N];

short cnt[k_N][k_Q];
short prefix[k_N];

pair<short, short> queries[k_Q];

short ans[k_Q][k_N];

int main(){
    ios::sync_with_stdio(false);
    cin.tie(NULL);

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

    int q;
    cin >> q;

    for(int i = 0; i < q; ++i){
        cin >> queries[i].first;
        queries[i].second = i;
    }

    sort(queries, queries + q);

    for(int d = 1; d < n - l + 1; d++){
        prefix[0] = (a[0] != a[d]);
        for(int i = 1; i < n - d; ++i)
            prefix[i] = (a[i] != a[i + d]) + prefix[i - 1];

        for(int i = 0; i < n - l + 1 - d; ++i){
            short sum = prefix[i + l - 1];
            if(i)
                sum -= prefix[i - 1];

            int idx = lower_bound(queries, queries + q, pair<short, short>{sum, -1}) - queries;
            cnt[i][idx]++;
            cnt[i + d][idx]++;
        }
    }

    for(int i = 0; i < n - l + 1; ++i)
        for(int j = 1; j < q; ++j)
            cnt[i][j] += cnt[i][j - 1]; 

    for(int i = 0; i < q; ++i)
        for(int j = 0; j < n - l + 1; ++j)
            ans[queries[i].second][j] = cnt[j][i];

    for(int i = 0; i < q; ++i){
        for(int j = 0; j < n - l + 1; ++j)
            cout << ans[i][j] << " ";
        cout << "\n"; 
    }
}

• Subtask 1: 25 / 25
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 15 / 15
• Subtask 5: 20 / 20