oj.uz

Submission #932645

# Submission time Handle Problem Language Result Execution time Memory
932645 2024-02-24T01:47:59 Z Whisper Index (COCI21_index) C++17
60 / 110
 2500 ms 5204 KB 
#include <bits/stdc++.h>

using namespace std;
using ll = long long;

//#define int long long
#define FOR(i, a, b) for ( int i = a ; i <= b ; i++ )
#define FORD(i, a, b) for (int i = b; i >= a; i --)
#define REP(i, n) for (int i = 0; i < n; ++i)
#define REPD(i, n) for (int i = n - 1; i >= 0; --i)
#define pii pair<int , int>
#define Lg(x) 31 - __builtin_clz(x)

#define MASK(i) (1LL << (i))
#define BIT(x, i) (((x) >> (i)) & 1)

constexpr ll LINF = (1ll << 60);
constexpr int INF = (1ll << 30);
constexpr int MAX = 2e5 + 5;
constexpr int Mod = 1e9 + 7;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

void setupIO(){
    #define name "Whisper"
    //Phu Trong from Nguyen Tat Thanh High School for gifted student
    srand(time(NULL));
    cin.tie(nullptr)->sync_with_stdio(false); cout.tie(nullptr);
    //freopen(name".inp", "r", stdin);
    //freopen(name".out", "w", stdout);
    cout << fixed << setprecision(10);
}

template <class X, class Y>
    bool minimize(X &x, const Y &y){
        X eps = 1e-9;
        if (x > y + eps) {x = y; return 1;}
        return 0;
    }

template <class X, class Y>
    bool maximize(X &x, const Y &y){
        X eps = 1e-9;
        if (x + eps < y) {x = y; return 1;}
        return 0;
    }
int nArr, numQuery;
int a[MAX];

#define Block 444

struct Queries{
    int l, r, id;
    Queries(){}
    Queries(int _l, int _r, int _id): l(_l), r(_r), id(_id){}

    bool operator < (const Queries& oth) const{
        if (l / Block == oth.l / Block) return r < oth.r;
        return l / Block < oth.l / Block;
    }
} qs[MAX];
int frq[MAX];

struct FenwickTree{
    int n;
    vector<int> f;
    void init(int _n){
        this -> n = _n;
        f.resize(n + 5);
    }

    void modify(int x, int val){
        for ( ; x > 0; x -= x & (-x)) f[x] += val;
    }
    int query(int x){
        int res = 0;
        for ( ; x <= n; x += x & (-x)) res += f[x];
        return res;
    }
    int query(int l, int r){
        return query(r) - query(l - 1);
    }
} fen;
void add(int x){
    fen.modify(x, 1);
}
void sub(int x){
    fen.modify(x, -1);
}
void Whisper(){
    cin >> nArr >> numQuery;
    int Lim = 0;
    for (int i = 1; i <= nArr; ++i) cin >> a[i], maximize(Lim, a[i]);
    for (int i = 1; i <= numQuery; ++i){
        int l, r; cin >> l >> r;
        qs[i] = Queries(l, r, i);
    }
    fen.init(Lim + 5);
    int L = 1, R = 0;
    for (int i = 1; i <= numQuery; ++i){
        while (L > qs[i].l) add(a[--L]);
        while (L < qs[i].l) sub(a[L++]);
        while (R > qs[i].r) sub(a[R--]);
        while (R < qs[i].r) add(a[++R]);

        int l = 1, r = Lim;
        int ans = 1;
        while (l <= r){
            int mid = (l + r) >> 1;
            if (fen.query(mid) >= mid){
                ans = mid, l = mid + 1;
            }
            else r = mid - 1;
        }
        cout << ans << '\n';
    }
}


signed main(){
    setupIO();
    int Test = 1;
//    cin >> Test;
    for ( int i = 1 ; i <= Test ; i++ ){
        Whisper();
        if (i < Test) cout << '\n';
    }
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2472 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 2 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2392 KB Output is correct
10 Correct 1 ms 2392 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2472 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 2 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2392 KB Output is correct
10 Correct 1 ms 2392 KB Output is correct
11 Correct 2021 ms 3196 KB Output is correct
12 Correct 2032 ms 3340 KB Output is correct
13 Correct 2025 ms 3280 KB Output is correct
14 Correct 2048 ms 3288 KB Output is correct
15 Correct 2020 ms 3308 KB Output is correct
16 Correct 2069 ms 3380 KB Output is correct
17 Correct 2045 ms 3212 KB Output is correct
18 Correct 2025 ms 3428 KB Output is correct
19 Correct 2051 ms 3456 KB Output is correct
20 Correct 2021 ms 3268 KB Output is correct

Subtask #3
0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2472 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 2 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2392 KB Output is correct
10 Correct 1 ms 2392 KB Output is correct
11 Correct 2021 ms 3196 KB Output is correct
12 Correct 2032 ms 3340 KB Output is correct
13 Correct 2025 ms 3280 KB Output is correct
14 Correct 2048 ms 3288 KB Output is correct
15 Correct 2020 ms 3308 KB Output is correct
16 Correct 2069 ms 3380 KB Output is correct
17 Correct 2045 ms 3212 KB Output is correct
18 Correct 2025 ms 3428 KB Output is correct
19 Correct 2051 ms 3456 KB Output is correct
20 Correct 2021 ms 3268 KB Output is correct
21 Execution timed out 2567 ms 5204 KB Time limit exceeded
22 Halted 0 ms 0 KB -