Submission #411283

#	Time	Username	Problem	Language	Result	Execution time	Memory
411283		LouayFarah	Dancing Elephants (IOI11_elephants)	C++14	26 / 100	9094 ms	972 KiB

elephants

#include "bits/stdc++.h"
#include "elephants.h"
using namespace std;
 
int n, l;
int *x;
vector<int> pos;
vector<int> ele;
 
void init(int N, int L, int X[])
{
    n = N;
    l = L;
    x = X;
    pos.resize(n);
    ele.resize(n);
    for(int i = 0; i<n; i++)
    {
        pos[i] = i;
        ele[i] = x[i];
    }
 
}
 
int solve()
{
    int len = x[0];
    len+=l;
    int res = 1;
    int j = 1;
    while(j<n)
    {
        while(j<n&&x[j]<=len)
            j++;
        res++;
        len = x[j]+l;
    }
 
    return res-1;
}
 
int get_max()
{
    int maxi = 0;
    for(int j = 0; j<n; j++)
        maxi = max(maxi, x[j]);
    return maxi;
}
 
void count_sort(int e)
{
    vector<int> book(10, 0);
    for(int j = 0; j<n; j++)
        book[(x[j]/e)%10]++;
 
    /*for(int j = 0; j<10; j++)
        cout << book[j] << ' ';
    cout << endl;*/
    int output[n];
    for(int j = 1; j<10; j++)
        book[j]+=book[j-1];
    for(int j = n-1; j>=0; j--)
    {
        output[book[(x[j]/e)%10]-1] = x[j];
        book[(x[j]/e)%10]--;
    }
 
    for(int j = 0; j<n; j++)
        x[j] = output[j];
}
 
void radix_sort()
{
    int m = get_max();
 
    for(int e = 1; m/e>0; e*=10)
        count_sort(e);
}
 
int update(int i, int y)
{
    int ind = lower_bound(x, x+n, ele[i]) - x;
    x[ind] = y;
    ele[i] = y;
    radix_sort();
    /*for(int j = 0; j<n; j++)
        cout << x[j] << ' ';
    cout << endl;*/
    int res = solve();
    return res;
}

• Subtask 1: 10 / 10
• Subtask 2: 16 / 16
• Subtask 3: 0 / 24
• Subtask 4: 0 / 47
• Subtask 5: 0 / 3