oj.uz

Submission #671983

# Submission time Handle Problem Language Result Execution time Memory
671983 2022-12-14T14:00:50 Z mychecksedad Index (COCI21_index) C++17
60 / 110
 2500 ms 154256 KB 
/* Author : Mychecksdead */
#include<bits/stdc++.h>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
using namespace std;
typedef long long int ll;
typedef long double ld;
#define MOD1 (1000000000+7)
#define MOD (998244353)
#define PI 3.1415926535
#define pb push_back
#define setp() cout << setprecision(15)
#define all(x) x.begin(), x.end()
#define debug(x) cerr << #x << " is " << x << '\n';
const int N = 2e5+500, M = 1e5+10, F = 2147483646, K = 20;


int n, q, a[N], res[N];
vector<array<int, 5>> Q;
vector<array<int, 3>> searchs[N*4];
vector<int> t[N*4];

void build(int l, int r, int k){
    if(l == r){
        t[k] = {0, a[l]};
        return;
    }
    int m = (l+r)>>1;
    build(l, m, k<<1);
    build(m+1, r, k<<1|1);
    merge(t[k<<1].begin() + 1, t[k<<1].end(), all(t[k<<1|1]), back_inserter(t[k]));  
}

void add_bs(int l, int r, int ql, int qr, int k, int val, int idx){
    if(ql > r || l > qr) return;
    if(ql <= l && r <= qr){
        searchs[k].pb({val, idx, int(t[k].size())});
        return;
    }
    int m = (l + r) >> 1;
    add_bs(l, m, ql, qr, k<<1, val, idx);
    add_bs(m+1, r, ql, qr, k<<1|1, val, idx);
}

void s(int k, int l, int r, vector<array<int, 3>> v){
    if(v.empty() || r < l) return;
    int m = (l + r) >> 1;
    vector<array<int, 3>> s_l, s_r;
    for(auto u: v){
        int val = u[0], idx = u[1];
        if(val <= t[k][m]){
            res[idx] -= t[k].size() - u[2];
            res[idx] += t[k].size() - m;
            u[2] = m;
            // cout << u[0] << ' ' << u[1] << ':' << m << '\n';
            s_l.pb(u);
        }else{
            s_r.pb(u);
        }
    }
    s(k, l, m - 1, s_l);
    s(k, m + 1, r, s_r);
}

void proc(){
    for(int k = 1; k <= 4*n; ++k){
        if(searchs[k].empty()) continue;
        s(k, 0, t[k].size() - 1, searchs[k]);
        searchs[k].clear();
    }
}

void solve(){
    cin >> n >> q;
    for(int i = 1; i <= n; ++i) cin >> a[i];
    for(int i = 0; i < q; ++i){
        int l, r; cin >> l >> r;
        Q.pb({l, r, 1, r - l + 1, 0});
    }
    build(1, n, 1);
    bool ok = 1;
    while(ok){
        ok = 0;
        for(int i = 0; i < q; ++i){
            if(Q[i][2] <= Q[i][3]){
                res[i] = 0;
                int m = (Q[i][2] + Q[i][3]) >> 1;
                add_bs(1, n, Q[i][0], Q[i][1], 1, m, i);
                ok = 1;
            }
        }
        if(!ok) break;
        proc();
        for(int i = 0; i < q; ++i){
            if(Q[i][2] <= Q[i][3]){
                // cout << res[i] << ' ' << Q[i][2] << ' ' << Q[i][3] << '\n';
                int m = (Q[i][2] + Q[i][3]) >> 1;
                if(res[i] >= m){
                    Q[i][4] = m;
                    Q[i][2] = m + 1;
                }else{
                    Q[i][3] = m - 1;
                }
            }
        }
        cout << '\n';
    }

    for(int i = 0; i < q; ++i) cout << Q[i][4] << '\n';
}




int main(){
    cin.tie(0); ios::sync_with_stdio(0);
    int T = 1, aa;
    // cin >> T;aa=T;
    while(T--){
        // cout << "Case #" << aa-T << ": ";
        solve();
        cout << '\n';
    }
    return 0;
 
}

Compilation message

index.cpp: In function 'int main()':
index.cpp:117:16: warning: unused variable 'aa' [-Wunused-variable]
  117 |     int T = 1, aa;
      |                ^~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 28 ms 38612 KB Output is correct
2 Correct 28 ms 38512 KB Output is correct
3 Correct 30 ms 38556 KB Output is correct
4 Correct 29 ms 38640 KB Output is correct
5 Correct 29 ms 38540 KB Output is correct
6 Correct 29 ms 38588 KB Output is correct
7 Correct 28 ms 38612 KB Output is correct
8 Correct 29 ms 38600 KB Output is correct
9 Correct 28 ms 38612 KB Output is correct
10 Correct 29 ms 38612 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 28 ms 38612 KB Output is correct
2 Correct 28 ms 38512 KB Output is correct
3 Correct 30 ms 38556 KB Output is correct
4 Correct 29 ms 38640 KB Output is correct
5 Correct 29 ms 38540 KB Output is correct
6 Correct 29 ms 38588 KB Output is correct
7 Correct 28 ms 38612 KB Output is correct
8 Correct 29 ms 38600 KB Output is correct
9 Correct 28 ms 38612 KB Output is correct
10 Correct 29 ms 38612 KB Output is correct
11 Correct 1585 ms 66912 KB Output is correct
12 Correct 1614 ms 66648 KB Output is correct
13 Correct 1542 ms 67424 KB Output is correct
14 Correct 1637 ms 66772 KB Output is correct
15 Correct 1593 ms 66624 KB Output is correct
16 Correct 1595 ms 66988 KB Output is correct
17 Correct 1606 ms 66696 KB Output is correct
18 Correct 1624 ms 66728 KB Output is correct
19 Correct 1583 ms 67216 KB Output is correct
20 Correct 1569 ms 66924 KB Output is correct

Subtask #3
0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 28 ms 38612 KB Output is correct
2 Correct 28 ms 38512 KB Output is correct
3 Correct 30 ms 38556 KB Output is correct
4 Correct 29 ms 38640 KB Output is correct
5 Correct 29 ms 38540 KB Output is correct
6 Correct 29 ms 38588 KB Output is correct
7 Correct 28 ms 38612 KB Output is correct
8 Correct 29 ms 38600 KB Output is correct
9 Correct 28 ms 38612 KB Output is correct
10 Correct 29 ms 38612 KB Output is correct
11 Correct 1585 ms 66912 KB Output is correct
12 Correct 1614 ms 66648 KB Output is correct
13 Correct 1542 ms 67424 KB Output is correct
14 Correct 1637 ms 66772 KB Output is correct
15 Correct 1593 ms 66624 KB Output is correct
16 Correct 1595 ms 66988 KB Output is correct
17 Correct 1606 ms 66696 KB Output is correct
18 Correct 1624 ms 66728 KB Output is correct
19 Correct 1583 ms 67216 KB Output is correct
20 Correct 1569 ms 66924 KB Output is correct
21 Execution timed out 2594 ms 154256 KB Time limit exceeded
22 Halted 0 ms 0 KB -