oj.uz

Submission #954106

# Submission time Handle Problem Language Result Execution time Memory
954106 2024-03-27T09:38:35 Z Beerus13 Index (COCI21_index) C++14
110 / 110
 696 ms 48516 KB 
#include<bits/stdc++.h>
using namespace std;
#define ll long long
const int N = 2e5 + 5;
const int K = 20;
const int inf = 1e9;

struct node {
    int x, l, r;
    node(int x = 0) {}
    node(int x, int l, int r) : x(x), l(l), r(r) {}
};

int n, q, a[N], nNode, nver, ver[N];
node st[N * K];

void refine(int cur) {
    st[cur].x = st[st[cur].l].x + st[st[cur].r].x;
}

int update(int pos, int val, int old, int l = 1, int r = N - 1) {
    int cur = ++nNode;
    if(l == r) {
        st[cur] = node(st[old].x + val, 0, 0);
        return cur;
    }
    int m = l + r >> 1;
    if(pos <= m) {
        st[cur].l = update(pos, val, st[old].l, l, m);
        st[cur].r = st[old].r;
    }
    else {
        st[cur].l = st[old].l;
        st[cur].r = update(pos, val, st[old].r, m + 1, r);
    }
    refine(cur);
    return cur;
}

int get(int ver1, int ver2, int u, int v, int l = 1, int r = N - 1) {
    if(u > r || v < l) return 0;
    if(u <= l && r <= v) return st[ver2].x - st[ver1].x;
    int m = l + r >> 1;
    return get(st[ver1].l, st[ver2].l, u, v, l, m) + get(st[ver1].r, st[ver2].r, u, v, m + 1, r);
}

void solve() {
    cin >> n >> q;
    for(int i = 1; i <= n; ++i) {
        cin >> a[i];
        ver[i] = update(a[i], 1, ver[i - 1]);
    }
    while(q--) {
        int ql, qr; cin >> ql >> qr;
        int l = 1, r = 2e5, ans;
        while(l <= r) {
            int m = l + r >> 1;
            if(get(ver[ql - 1], ver[qr], m, N - 1) >= m) ans = m, l = m + 1;
            else r = m - 1;
        }
        cout << ans << '\n';
    }
}

signed main() {
    ios::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    int test = 1;
    // cin >> test;
    while(test--) solve();
    return 0;
}

Compilation message

index.cpp: In function 'int update(int, int, int, int, int)':
index.cpp:27:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   27 |     int m = l + r >> 1;
      |             ~~^~~
index.cpp: In function 'int get(int, int, int, int, int, int)':
index.cpp:43:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   43 |     int m = l + r >> 1;
      |             ~~^~~
index.cpp: In function 'void solve()':
index.cpp:57:23: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   57 |             int m = l + r >> 1;
      |                     ~~^~~
index.cpp:61:24: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized]
   61 |         cout << ans << '\n';
      |                        ^~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 2652 KB Output is correct
2 Correct 3 ms 2652 KB Output is correct
3 Correct 3 ms 2652 KB Output is correct
4 Correct 3 ms 2652 KB Output is correct
5 Correct 3 ms 2648 KB Output is correct
6 Correct 4 ms 2904 KB Output is correct
7 Correct 3 ms 2648 KB Output is correct
8 Correct 3 ms 2652 KB Output is correct
9 Correct 3 ms 2648 KB Output is correct
10 Correct 3 ms 2652 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 2652 KB Output is correct
2 Correct 3 ms 2652 KB Output is correct
3 Correct 3 ms 2652 KB Output is correct
4 Correct 3 ms 2652 KB Output is correct
5 Correct 3 ms 2648 KB Output is correct
6 Correct 4 ms 2904 KB Output is correct
7 Correct 3 ms 2648 KB Output is correct
8 Correct 3 ms 2652 KB Output is correct
9 Correct 3 ms 2648 KB Output is correct
10 Correct 3 ms 2652 KB Output is correct
11 Correct 120 ms 13608 KB Output is correct
12 Correct 121 ms 13404 KB Output is correct
13 Correct 134 ms 13408 KB Output is correct
14 Correct 121 ms 13592 KB Output is correct
15 Correct 120 ms 13392 KB Output is correct
16 Correct 124 ms 13396 KB Output is correct
17 Correct 121 ms 13396 KB Output is correct
18 Correct 131 ms 13428 KB Output is correct
19 Correct 143 ms 13392 KB Output is correct
20 Correct 128 ms 13868 KB Output is correct

Subtask #3
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 2652 KB Output is correct
2 Correct 3 ms 2652 KB Output is correct
3 Correct 3 ms 2652 KB Output is correct
4 Correct 3 ms 2652 KB Output is correct
5 Correct 3 ms 2648 KB Output is correct
6 Correct 4 ms 2904 KB Output is correct
7 Correct 3 ms 2648 KB Output is correct
8 Correct 3 ms 2652 KB Output is correct
9 Correct 3 ms 2648 KB Output is correct
10 Correct 3 ms 2652 KB Output is correct
11 Correct 120 ms 13608 KB Output is correct
12 Correct 121 ms 13404 KB Output is correct
13 Correct 134 ms 13408 KB Output is correct
14 Correct 121 ms 13592 KB Output is correct
15 Correct 120 ms 13392 KB Output is correct
16 Correct 124 ms 13396 KB Output is correct
17 Correct 121 ms 13396 KB Output is correct
18 Correct 131 ms 13428 KB Output is correct
19 Correct 143 ms 13392 KB Output is correct
20 Correct 128 ms 13868 KB Output is correct
21 Correct 635 ms 48372 KB Output is correct
22 Correct 667 ms 48456 KB Output is correct
23 Correct 679 ms 48320 KB Output is correct
24 Correct 628 ms 48504 KB Output is correct
25 Correct 685 ms 48444 KB Output is correct
26 Correct 696 ms 48416 KB Output is correct
27 Correct 604 ms 48516 KB Output is correct
28 Correct 650 ms 48316 KB Output is correct
29 Correct 652 ms 46860 KB Output is correct
30 Correct 677 ms 47032 KB Output is correct