oj.uz

Submission #537834

# Submission time Handle Problem Language Result Execution time Memory
537834 2022-03-15T16:22:46 Z N1NT3NDO Index (COCI21_index) C++14
110 / 110
 792 ms 6372 KB 
#include <bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>
#define ll long long
#define pb push_back
#define sz(x) (int)x.size()
#define fi first
#define sd second
#define all(x) x.begin(), x.end()
//#pragma GCC target ("avx2")
//#pragma GCC optimization ("O3")
//#pragma GCC optimization ("unroll-loops")

using namespace std;
//using namespace __gnu_pbds;

//typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;

const int N = (int)2e5 + 5;
const int M = 400;
int n, a[N], f[N], m, ans[N];

struct que{
    int l, r, idx;
};

bool cmp(const que &a, const que &b)
{
    if (a.l / M != b.l / M)
      return a.l < b.l;
    else return a.r < b.r;
}

void upd(int x, int val)
{
    for(int i = x; i < N; i += i & -i) f[i] += val;
}

int get(int x)
{
    int res = 0;
    for(int i = x; i > 0; i -= i & -i) res += f[i];
    return res;
}

int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin >> n >> m;
    for(int i = 1; i <= n; i++) cin >> a[i];
    vector< que > queries;
    for(int i = 1; i <= m; i++)
    {
        int l, r;
        cin >> l >> r;
        queries.pb({l, r, i});
    }

    sort(all(queries), cmp);

    int cur_l = 1, cur_r = 0;

    for(const auto &[l, r, nom] : queries)
    {
        while(cur_l > l)
        {
            cur_l--;
            upd(a[cur_l], 1);
        }

        while(cur_r < r)
        {
            cur_r++;
            upd(a[cur_r], 1);
        }

        while(cur_l < l)
        {
            upd(a[cur_l], -1);
            cur_l++;
        }

        while(cur_r > r)
        {
            upd(a[cur_r], -1);
            cur_r--;
        }

        int L = 1, R = r - l + 1;
        while(L < R)
        {
            int m = (L + R + 1) >> 1;
            if (get(N - 1) - get(m - 1) >= m) L = m;
            else R = m - 1;
        }

        ans[nom] = L;
    }

    for(int i = 1; i <= m; i++) cout << ans[i] << '\n';
}

Compilation message

index.cpp: In function 'int main()':
index.cpp:62:21: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   62 |     for(const auto &[l, r, nom] : queries)
      |                     ^

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 340 KB Output is correct
2 Correct 3 ms 340 KB Output is correct
3 Correct 2 ms 340 KB Output is correct
4 Correct 2 ms 340 KB Output is correct
5 Correct 2 ms 340 KB Output is correct
6 Correct 2 ms 340 KB Output is correct
7 Correct 2 ms 340 KB Output is correct
8 Correct 2 ms 340 KB Output is correct
9 Correct 2 ms 340 KB Output is correct
10 Correct 2 ms 340 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 340 KB Output is correct
2 Correct 3 ms 340 KB Output is correct
3 Correct 2 ms 340 KB Output is correct
4 Correct 2 ms 340 KB Output is correct
5 Correct 2 ms 340 KB Output is correct
6 Correct 2 ms 340 KB Output is correct
7 Correct 2 ms 340 KB Output is correct
8 Correct 2 ms 340 KB Output is correct
9 Correct 2 ms 340 KB Output is correct
10 Correct 2 ms 340 KB Output is correct
11 Correct 182 ms 1912 KB Output is correct
12 Correct 180 ms 1896 KB Output is correct
13 Correct 174 ms 1912 KB Output is correct
14 Correct 184 ms 1908 KB Output is correct
15 Correct 173 ms 1908 KB Output is correct
16 Correct 178 ms 1904 KB Output is correct
17 Correct 177 ms 1912 KB Output is correct
18 Correct 185 ms 1848 KB Output is correct
19 Correct 176 ms 1988 KB Output is correct
20 Correct 179 ms 1900 KB Output is correct

Subtask #3
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 340 KB Output is correct
2 Correct 3 ms 340 KB Output is correct
3 Correct 2 ms 340 KB Output is correct
4 Correct 2 ms 340 KB Output is correct
5 Correct 2 ms 340 KB Output is correct
6 Correct 2 ms 340 KB Output is correct
7 Correct 2 ms 340 KB Output is correct
8 Correct 2 ms 340 KB Output is correct
9 Correct 2 ms 340 KB Output is correct
10 Correct 2 ms 340 KB Output is correct
11 Correct 182 ms 1912 KB Output is correct
12 Correct 180 ms 1896 KB Output is correct
13 Correct 174 ms 1912 KB Output is correct
14 Correct 184 ms 1908 KB Output is correct
15 Correct 173 ms 1908 KB Output is correct
16 Correct 178 ms 1904 KB Output is correct
17 Correct 177 ms 1912 KB Output is correct
18 Correct 185 ms 1848 KB Output is correct
19 Correct 176 ms 1988 KB Output is correct
20 Correct 179 ms 1900 KB Output is correct
21 Correct 770 ms 6296 KB Output is correct
22 Correct 765 ms 6304 KB Output is correct
23 Correct 763 ms 6372 KB Output is correct
24 Correct 780 ms 6296 KB Output is correct
25 Correct 745 ms 6292 KB Output is correct
26 Correct 771 ms 6296 KB Output is correct
27 Correct 792 ms 6300 KB Output is correct
28 Correct 770 ms 6264 KB Output is correct
29 Correct 758 ms 6288 KB Output is correct
30 Correct 752 ms 6292 KB Output is correct