oj.uz

Submission #1100559

# Submission time Handle Problem Language Result Execution time Memory
1100559 2024-10-14T09:00:23 Z Seyyed_Mojtaba_Mortazavi Election (BOI18_election) C++17
100 / 100
 1273 ms 35040 KB 
#include <bits/stdc++.h>

using namespace std;

typedef long long int ll;

const int MAXN = 5e5 + 10;

char c[MAXN];

struct Segment {
    
    struct Node {
        int pf, sf, sum, ans;
        Node()
        {
            pf = sf = sum = ans = 0;
        }
    } node[MAXN << 2];

    Node merge(Node l, Node r)
    {
        Node res;
        res.pf = max(l.pf, l.sum + r.pf);
        res.sf = max(r.sf, r.sum + l.sf);
        res.sum = l.sum + r.sum;
        res.ans = max(max(l.ans + r.sum, r.ans + l.sum), l.pf + r.sf);
        return res;
    }

    void initialize(int id, int l, int r)
    {
        if (l + 1 == r)
        {
            if (c[l] == 'T')
                node[id].pf = node[id].sf = node[id].sum = node[id].ans = 1;
            else
            {
                node[id].pf = node[id].sf = node[id].ans = 0;
                node[id].sum = -1;
            }
            return;
        }
        int mid = (l + r) >> 1;
        initialize(id << 1 | 0, l, mid);
        initialize(id << 1 | 1, mid, r);
        node[id] = merge(node[id << 1 | 0], node[id << 1 | 1]);
    }

    Node get(int id, int L, int R, int l, int r)
    {
        if (L == l && R == r)
        {
            return node[id];
        }
        int mid = (L + R) >> 1;
        Node res;
        if (l < mid)
            res = merge(res, get(id << 1 | 0, L, mid, l, min(r, mid)));
        if (r > mid)
            res = merge(res, get(id << 1 | 1, mid, R, max(l, mid), r));
        return res;
    }

} Seg;

int main()
{
    int n, q;
    cin >> n;
    for (int i = 1; i <= n; i++)
        cin >> c[i];
    Seg.initialize(1, 1, n + 1);
    cin >> q;
    while (q--)
    {
        int l, r;
        cin >> l >> r;
        auto ans = Seg.get(1, 1, n + 1, l, r + 1);
        cout << ans.ans << endl;
    }
    return 0;
}

Subtask #1
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 31568 KB Output is correct
2 Correct 10 ms 31568 KB Output is correct
3 Correct 9 ms 31740 KB Output is correct
4 Correct 9 ms 31568 KB Output is correct
5 Correct 10 ms 31568 KB Output is correct

Subtask #2
54.0 / 54.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 31568 KB Output is correct
2 Correct 10 ms 31568 KB Output is correct
3 Correct 9 ms 31740 KB Output is correct
4 Correct 9 ms 31568 KB Output is correct
5 Correct 10 ms 31568 KB Output is correct
6 Correct 177 ms 32012 KB Output is correct
7 Correct 168 ms 32088 KB Output is correct
8 Correct 156 ms 31824 KB Output is correct
9 Correct 159 ms 31836 KB Output is correct
10 Correct 165 ms 32072 KB Output is correct
11 Correct 161 ms 32072 KB Output is correct
12 Correct 156 ms 32072 KB Output is correct
13 Correct 163 ms 32120 KB Output is correct
14 Correct 157 ms 31972 KB Output is correct
15 Correct 180 ms 31880 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 31568 KB Output is correct
2 Correct 10 ms 31568 KB Output is correct
3 Correct 9 ms 31740 KB Output is correct
4 Correct 9 ms 31568 KB Output is correct
5 Correct 10 ms 31568 KB Output is correct
6 Correct 177 ms 32012 KB Output is correct
7 Correct 168 ms 32088 KB Output is correct
8 Correct 156 ms 31824 KB Output is correct
9 Correct 159 ms 31836 KB Output is correct
10 Correct 165 ms 32072 KB Output is correct
11 Correct 161 ms 32072 KB Output is correct
12 Correct 156 ms 32072 KB Output is correct
13 Correct 163 ms 32120 KB Output is correct
14 Correct 157 ms 31972 KB Output is correct
15 Correct 180 ms 31880 KB Output is correct
16 Correct 1261 ms 34124 KB Output is correct
17 Correct 1156 ms 34044 KB Output is correct
18 Correct 1141 ms 34028 KB Output is correct
19 Correct 1126 ms 33552 KB Output is correct
20 Correct 1252 ms 33096 KB Output is correct
21 Correct 1250 ms 34872 KB Output is correct
22 Correct 1253 ms 34908 KB Output is correct
23 Correct 1269 ms 35040 KB Output is correct
24 Correct 1273 ms 34780 KB Output is correct
25 Correct 1199 ms 34264 KB Output is correct