Submission #781572

#	Time	Username	Problem	Language	Result	Execution time	Memory
781572		ZHIRDILBILDIZ	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++14	13 / 100	882 ms	223444 KiB

sortbooks

#include<bits/stdc++.h>
#define fi first
#define se second
using namespace std ;
const int N = (1 << 20) ;
bool ans[N + 1] ;
int n, m, all_mx, all_mn = 1e9, pos[1001], a[N + 1], l[N + 1], r[N + 1], k[N + 1], ind[N + 1], pw[N + 1], mx[N + 1][21], mn1[N + 1][21], mn2[N + 1][21] ;
vector<int> qr[N + 1] ;
void build_sparce_table1()
{
    mn1[1][0] = a[1] ;
    for(int i = 2 ; i <= N ; i++)
        pw[i] = pw[i / 2] + 1, mn1[i][0] = a[i] ;
    for(int i = 1 ; i < 21 ; i++)
        for(int j = 1 ; j <= N - (1 << i) + 1 ; j++)
            mn1[j][i] = min(mn1[j][i - 1], mn1[j + (1 << (i - 1))][i - 1]) ;
}
int get_min1(int l, int r)
{
    int num = pw[r - l + 1] ;
    return min(mn1[l][num], mn1[r - (1 << num) + 1][num]) ;
}
void build_sparce_table2()
{
    mn2[1][0] = ind[1] ;
    for(int i = 2 ; i <= N ; i++)
        mn2[i][0] = ind[i] ;
    for(int i = 1 ; i < 21 ; i++)
        for(int j = 1 ; j <= N - (1 << i) + 1 ; j++)
            mn2[j][i] = min(mn2[j][i - 1], mn2[j + (1 << (i - 1))][i - 1]) ;
}
int get_min2(int l, int r)
{
    int num = pw[r - l + 1] ;
    return min(mn2[l][num], mn2[r - (1 << num) + 1][num]) ;
}
void build_sparce_table3()
{
    mx[1][0] = a[1] ;
    for(int i = 2 ; i <= N ; i++)
        mx[i][0] = a[i] ;
    for(int i = 1 ; i < 21 ; i++)
        for(int j = 1 ; j <= N - (1 << i) + 1 ; j++)
            mx[j][i] = max(mx[j][i - 1], mx[j + (1 << (i - 1))][i - 1]) ;
}
int get_max(int l, int r)
{
    int num = pw[r - l + 1] ;
    return max(mx[l][num], mx[r - (1 << num) + 1][num]) ;
}
signed main()
{
    ios_base::sync_with_stdio( 0 ) ;
    cin.tie( 0 ) ;
    cout.tie( 0 ) ;
    cin >> n >> m ;
    for(int i = 1 ; i <= n ; i++)
        cin >> a[i], all_mn = min(all_mn, a[i]), all_mx = max(all_mx, a[i]) ;
    if(n <= 5e3 && m <= 5e3)
    {
        for(int i = 1 ; i <= m ; i++)
        {
            int sum = 0 ;
            cin >> l[i] >> r[i] >> k[i] ;
            pair<int, int> b[n + 1] ;
            int pref[n + 1] = {} ;
            for(int i = 1 ; i <= n ; i++)
                b[i] = {a[i], i} ;
            for(int i = l[i] ; i <= r[i] ; i++)
                pref[i] = max(pref[i - 1], a[i]) ;
            sort(b + l[i], b + r[i] + 1) ;
            for(int i = l[i] ; i <= r[i] ; i++)
                if(pref[b[i].se - 1] > b[i].fi)sum = max(sum, pref[b[i].se - 1] + b[i].fi) ;
            if(sum <= k[i])
                cout << "1\n" ;
            else
                cout << "0\n" ;
        }
        return 0 ;
    }
    if(all_mx <= 1000)
    {
        for(int i = 1 ; i <= m ; i++)
        {
            cin >> l[i] >> r[i] >> k[i] ;
            qr[r[i]].push_back(i) ;
        }
        build_sparce_table3() ;
        for(int i = 1 ; i <= n ; i++)
        {
            pos[a[i]] = i ;
            for(int j : qr[i])
            {
                bool flag = 0 ;
                for(int q = 0 ; q <= all_mx ; q++)
                    if(l[j] < pos[q] && get_max(l[j], pos[q]) > q && get_max(l[j], pos[q]) + q > k[j])
                    {
                        flag = 1 ;
                        break ;
                    }
                ans[j] = 1 ^ flag ;
            }
        }
        for(int i = 1 ; i <= m ; i++)
            cout << ans[i] << '\n' ;
        return 0 ;
    }
    build_sparce_table1() ;
    for(int i = 1 ; i <= N ; i++)
    {
        int l1 = i, r1 = N + 1 ;
        while(l1 + 1 < r1)
        {
            int mid = (l1 + r1) >> 1 ;
            if(get_min1(i, mid) < a[i])r1 = mid ;
            else l1 = mid ;
        }
        ind[i] = r1 ;
    }
    build_sparce_table2() ;
    for(int i = 1 ; i <= m ; i++)
    {
        cin >> l[i] >> r[i] >> k[i] ;
        if(l[i] == r[i] || get_min2(l[i], r[i] - 1) > r[i])cout << "1\n" ;
        else cout << "0\n" ;
    }
    return 0 ;
}

Compilation message (stderr)

sortbooks.cpp: In function 'int main()':
sortbooks.cpp:69:21: warning: 'i' may be used uninitialized in this function [-Wmaybe-uninitialized]
   69 |             for(int i = l[i] ; i <= r[i] ; i++)
      |                     ^
sortbooks.cpp:72:21: warning: 'i' may be used uninitialized in this function [-Wmaybe-uninitialized]
   72 |             for(int i = l[i] ; i <= r[i] ; i++)
      |                     ^

• Subtask 1: 0 / 8
• Subtask 2: 0 / 9
• Subtask 3: 13 / 13
• Subtask 4: 0 / 17
• Subtask 5: 0 / 30
• Subtask 6: 0 / 23