oj.uz

답안 #648401

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
648401 2022-10-06T10:37:16 Z mychecksedad Hedgehog Daniyar and Algorithms (IZhO19_sortbooks) C++17
0 / 100
 3000 ms 262144 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 MOD (1000000000+7)
#define MOD1 (998244353)
#define PI 3.1415926535
#define pb push_back
#define setp() cout << setprecision(15)
#define all(x) x.begin(), x.end()
#define oset tree<int, null_type,less_equal<int>, rb_tree_tag,tree_order_statistics_node_update>
#define debug(x) cerr << #x << " is " << x << '\n';
const int N = 1e6+100, M = 1e5+10, F = 2147483646, K = 20;


int n, m, a[N], dp[N][K];
vector<int> t[4*N];
void build(int l, int r, int k){
    if(l == r){
        t[k] = {a[l]};
        return;
    }
    int m = (l+r)>>1;
    build(l, m, k<<1);
    build(m+1, r, k<<1|1);
    merge(all(t[k<<1]), all(t[k<<1|1]), back_inserter(t[k]));
}
int find(int l, int r){
    int k = int(log2(r-l+1));
    return max(dp[l][k], dp[r - (1<<k) + 1][k]);
}
pair<int, int> larger(int l, int r, int ql, int qr, int k, int val){
    if(l > qr || r < ql) return {0, 0};
    if(ql <= l && r <= qr){
        return {(upper_bound(all(t[k]), val) - t[k].begin()), (lower_bound(all(t[k]), val) - t[k].begin())};
    }
    int m = (l + r) >> 1;
    auto v = larger(l, m, ql, qr, k<<1, val);
    auto p = larger(m+1, r, ql, qr, k<<1|1, val);
    return {v.first + p.first, v.second + p.second};
}
int q(int l, int r, int ql, int qr, int k, int val){
    if(l > qr || r < ql) return 0;
    if(ql <= l && r <= qr){
        int idx = lower_bound(all(t[k]), val) - t[k].begin();

        return (idx == 0 ? 0 : t[k][idx - 1]);
    }
    int m = (l + r) >> 1;
    return max(q(l, m, ql, qr, k<<1, val), q(m + 1, r, ql, qr, k<<1|1, val));
}
int query(int l, int r, int k){
    if(l == r){
        return 0;
    }
    int m = (l+r)>>1;
    int lb = 1, rb = MOD, med = MOD, med1 = MOD;
    while(lb <= rb){
        int mid = (lb +  rb) >> 1;
        auto v = larger(1, n, l, r, 1, mid);
        // cout << mid << ' ' << v.first << ' ' << v.second << '\n';
        if(v.first < (m-l+2)){
            lb = mid + 1;
        }else if(v.second > (m-l+1)){
            rb = mid - 1;
        }else{
            med = mid;
            // cout << "zort\n";
            break;
        }
        
    }
    lb = 1, rb = MOD;
    while(lb <= rb){
        int mid = (lb +  rb) >> 1;
        auto v = larger(1, n, l, r, 1, mid);
        // cout << mid << ' ' << v.first << ' ' << v.second << '\n';
        if(v.first < (m-l+1)){
            lb = mid + 1;
        }else if(v.second > (m-l)){
            rb = mid - 1;
        }else{
            med1 = mid;
            // cout << "zort\n";
            break;
        }
        
    }
    // cout << l << ' ' << r << 'f';
    // cout << med << '\n';
    int mx = find(l, m);
    if(mx <= med1) mx = 0;
    return max({q(1, n, m + 1, r, 1, med) + mx, query(l, m, k), query(m + 1, r, k)});
}
void solve(){
    cin >> n >> m;
    for(int i = 1; i <= n; ++i) cin >> a[i];
    for(int i = 1; i <= n; ++i) dp[i][0] = a[i];
    for(int j = 1; j < K; ++j){
        for(int i = 1; i + (1<<j) <= n + 1; ++i){
            dp[i][j] = max(dp[i][j - 1], dp[i + (1<<(j-1))][j - 1]);
        }
    }
    build(1, n, 1);
    for(;m--;){
        int l, r, k; cin >> l >> r >> k;
        cout << (query(l, r, k) <= k) << '\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

sortbooks.cpp: In function 'int main()':
sortbooks.cpp:120:16: warning: unused variable 'aa' [-Wunused-variable]
  120 |     int T = 1, aa;
      |                ^~

Subtask #1
0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 50 ms 94256 KB Output is correct
2 Correct 51 ms 94196 KB Output is correct
3 Incorrect 148 ms 94292 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 50 ms 94256 KB Output is correct
2 Correct 51 ms 94196 KB Output is correct
3 Incorrect 148 ms 94292 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 516 ms 262144 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #4
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 3052 ms 115784 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 50 ms 94256 KB Output is correct
2 Correct 51 ms 94196 KB Output is correct
3 Incorrect 148 ms 94292 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 50 ms 94256 KB Output is correct
2 Correct 51 ms 94196 KB Output is correct
3 Incorrect 148 ms 94292 KB Output isn't correct
4 Halted 0 ms 0 KB -