Submission #781416

#	Time	Username	Problem	Language	Result	Execution time	Memory
781416		ZHIRDILBILDIZ	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++14	21 / 100	3055 ms	186796 KiB

sortbooks

#include<bits/stdc++.h>
using namespace std ;
const int N = (1 << 20) ;
map<int, int> sum ;
int n, m, all_mn = 1e9, a[N + 1], ind[N + 1], pw[N + 1], mn1[N + 1][21], mn2[N + 1][21] ;
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]) ;
}
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]) ;
    if(n <= 5e3 && m <= 5e3)
    {
        while(m--)
        {
            int l, r, k, b[n + 1], sum = 0 ;
            cin >> l >> r >> k ;
            for(int i = 1 ; i <= n ; i++)
                b[i] = a[i] ;
            for(int i = l ; i <= r ; i++)
            {
                int mn = 1e9 + 1, ind ;
                for(int j = i ; j <= r ; j++)
                    if(mn > b[j])
                    {
                        mn = b[j] ;
                        ind = j ;
                    }
                for(int q = ind ; q > i ; q--)
                {
                    sum = max(sum, b[q] + b[q - 1]) ;
                    swap(b[q], b[q - 1]) ;
                }
            }
            if(sum <= k)
                cout << "1\n" ;
            else
                cout << "0\n" ;
        }
        return 0 ;
    }
    build_sparce_table1() ;
    for(int i = 1 ; i <= N ; i++)
    {
        int l = i, r = N + 1 ;
        while(l + 1 < r)
        {
            int mid = (l + r) >> 1 ;
            if(get_min1(i, mid) < a[i])r = mid ;
            else l = mid ;
        }
        ind[i] = r ;
    }
    build_sparce_table2() ;
    while(m--)
    {
        int l, r, k ;
        cin >> l >> r >> k ;
        if(l == r || get_min2(l, r - 1) > r)cout << "1\n" ;
        else cout << "0\n" ;
    }
    return 0 ;
}

Compilation message (stderr)

sortbooks.cpp: In function 'int main()':
sortbooks.cpp:52:35: warning: 'ind' may be used uninitialized in this function [-Wmaybe-uninitialized]
   52 |                 int mn = 1e9 + 1, ind ;
      |                                   ^~~

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