oj.uz

답안 #924936

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
924936 2024-02-10T05:20:38 Z vjudge1 Index (COCI21_index) C++17
110 / 110
 1240 ms 136784 KB 
#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define ull unsigned long long
#define ii pair<int, int>
#define mp make_pair
#define range(v) v.begin(), v.end()
#define sz(v) (int)v.size()
#define file(name) if(fopen(name".INP", "r")) {freopen(name".INP", "r", stdin); freopen(name".OUT", "w", stdout);}
#define usaco(name) if(fopen(name".in", "r")) {freopen(name".in", "r", stdin); freopen(name".out", "w", stdout);}

#define el "\n"
#define fi first
#define se second

template<typename T> bool maximize(T &res, const T &val) { if (res < val){ res = val; return true; }; return false; }
template<typename T> bool minimize(T &res, const T &val) { if (res > val){ res = val; return true; }; return false; }

const int N = 2e5 + 12;

int n, q;

struct node {
    int val;
    node *lpt, *rpt;

    node(int x) : val(x), lpt(nullptr), rpt(nullptr) {}
    node(node *cur) : val(cur -> val), lpt(cur -> lpt), rpt(cur -> rpt) {}
    node(node *l, node *r) {
        lpt = l; rpt = r;
        val = (lpt == nullptr ? 0 : lpt -> val) + (rpt == nullptr ? 0 : rpt -> val);
    }
};

node *build(int l, int r) {
    if(l == r) return new node(0);
    int m = (l + r) >> 1;
    return new node(build(l, m), build(m + 1, r));
}

node *update(node *previous, int l, int r, int pos) {
    if(l == r) return new node(previous -> val + 1);
    int m = (l + r) >> 1;
    if(pos <= m)
        return new node(update(previous -> lpt, l, m, pos), previous -> rpt);
    else
        return new node(previous -> lpt, update(previous -> rpt, m + 1, r, pos));
}

int get(node *versionLeft, node *versionRight, int l, int r, int u, int v) {
    if(r < u || v < l) return 0;
    if(u <= l && r <= v)  return (versionRight -> val) - (versionLeft -> val);
    int m = (l + r) >> 1;
    return get(versionLeft -> lpt, versionRight -> lpt, l, m, u, v) +
           get(versionLeft -> rpt, versionRight -> rpt, m + 1, r, u, v);
}

node *ver[N];

void solve() {
    cin >> n >> q;

    ver[0] = build(0, N - 1);
    for(int i = 1; i <= n; i++) {
        int x; cin >> x;
        ver[i] = update(ver[i - 1], 0, N - 1, x);
    }

    while(q--) {
        int l, r; cin >> l >> r;

        int left = 2, right = r - l + 1, res = 1;

        while(left <= right) {
            int mid = (left + right) >> 1;
            if(get(ver[l - 1], ver[r], 0, N - 1, mid, N - 1) >= mid)
                res = mid, left = mid + 1;
            else
                right = mid - 1;
        }

        cout << res << el;
    }
}

signed main() {
    ios_base::sync_with_stdio(0); cin.tie(0);
    file("kurumi");
    solve();
    // cerr << el<< "Time elapsed: " << (1000.0 * clock() / CLOCKS_PER_SEC) << "ms.\n";
    return 0;
}

/*
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*/

Compilation message

index.cpp: In function 'int main()':
index.cpp:10:55: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 | #define file(name) if(fopen(name".INP", "r")) {freopen(name".INP", "r", stdin); freopen(name".OUT", "w", stdout);}
      |                                                ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
index.cpp:89:5: note: in expansion of macro 'file'
   89 |     file("kurumi");
      |     ^~~~
index.cpp:10:88: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 | #define file(name) if(fopen(name".INP", "r")) {freopen(name".INP", "r", stdin); freopen(name".OUT", "w", stdout);}
      |                                                                                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
index.cpp:89:5: note: in expansion of macro 'file'
   89 |     file("kurumi");
      |     ^~~~

Subtask #1
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 13400 KB Output is correct
2 Correct 12 ms 13532 KB Output is correct
3 Correct 12 ms 13508 KB Output is correct
4 Correct 12 ms 13596 KB Output is correct
5 Correct 13 ms 13404 KB Output is correct
6 Correct 15 ms 13404 KB Output is correct
7 Correct 12 ms 13404 KB Output is correct
8 Correct 12 ms 13404 KB Output is correct
9 Correct 12 ms 13472 KB Output is correct
10 Correct 12 ms 13404 KB Output is correct

Subtask #2
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 13400 KB Output is correct
2 Correct 12 ms 13532 KB Output is correct
3 Correct 12 ms 13508 KB Output is correct
4 Correct 12 ms 13596 KB Output is correct
5 Correct 13 ms 13404 KB Output is correct
6 Correct 15 ms 13404 KB Output is correct
7 Correct 12 ms 13404 KB Output is correct
8 Correct 12 ms 13404 KB Output is correct
9 Correct 12 ms 13472 KB Output is correct
10 Correct 12 ms 13404 KB Output is correct
11 Correct 184 ms 43604 KB Output is correct
12 Correct 180 ms 43600 KB Output is correct
13 Correct 187 ms 43680 KB Output is correct
14 Correct 204 ms 43600 KB Output is correct
15 Correct 182 ms 43596 KB Output is correct
16 Correct 185 ms 43536 KB Output is correct
17 Correct 180 ms 43624 KB Output is correct
18 Correct 182 ms 43696 KB Output is correct
19 Correct 198 ms 43860 KB Output is correct
20 Correct 194 ms 43664 KB Output is correct

Subtask #3
50.0 / 50.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 13400 KB Output is correct
2 Correct 12 ms 13532 KB Output is correct
3 Correct 12 ms 13508 KB Output is correct
4 Correct 12 ms 13596 KB Output is correct
5 Correct 13 ms 13404 KB Output is correct
6 Correct 15 ms 13404 KB Output is correct
7 Correct 12 ms 13404 KB Output is correct
8 Correct 12 ms 13404 KB Output is correct
9 Correct 12 ms 13472 KB Output is correct
10 Correct 12 ms 13404 KB Output is correct
11 Correct 184 ms 43604 KB Output is correct
12 Correct 180 ms 43600 KB Output is correct
13 Correct 187 ms 43680 KB Output is correct
14 Correct 204 ms 43600 KB Output is correct
15 Correct 182 ms 43596 KB Output is correct
16 Correct 185 ms 43536 KB Output is correct
17 Correct 180 ms 43624 KB Output is correct
18 Correct 182 ms 43696 KB Output is correct
19 Correct 198 ms 43860 KB Output is correct
20 Correct 194 ms 43664 KB Output is correct
21 Correct 1184 ms 136408 KB Output is correct
22 Correct 1226 ms 136528 KB Output is correct
23 Correct 1216 ms 136784 KB Output is correct
24 Correct 1240 ms 136284 KB Output is correct
25 Correct 1229 ms 136696 KB Output is correct
26 Correct 1232 ms 136272 KB Output is correct
27 Correct 1185 ms 136592 KB Output is correct
28 Correct 1205 ms 136432 KB Output is correct
29 Correct 1210 ms 136696 KB Output is correct
30 Correct 1184 ms 136636 KB Output is correct