Submission #66423

#	Time	Username	Problem	Language	Result	Execution time	Memory
66423		Kubalionzzale	Gondola (IOI14_gondola)	C++14	20 / 100	18 ms	1184 KiB

gondola

#include "gondola.h"

#include <iostream>
#include <algorithm>

int valid(int n, int a[])
{
    bool visited[250010] = { 0 };
    int remember = -1;
    for (int i = 0; i < n; ++i)
    {
        --a[i];
        if (visited[a[i]])
            return 0;
        else
            visited[a[i]] = 1;

        if (a[i] < n)
        {
            if (remember == -1)
                remember = i;
            else
            {
                int val1 = a[remember];
                int val2 = a[i];

                if (val1 > val2)
                {
                    if (remember == (i + (val1 - val2)) % n)
                        continue;
                    else
                        return 0;
                }
                else
                {
                    if (i == (remember + (val2 - val1)) % n)
                        continue;
                    else
                        return 0;
                }
            }
        }
    }

    return 1;
}

//----------------------

int replacement(int n, int a[], int ans[])
{
    int model[100010] = { 0 };
    int diff = -1;
    bool visited[250010] = { 0 };
    int max = 0;
    for (int i = 0; i < n; ++i)
    {
        if (a[i] <= n)
        {
            --a[i];

            diff = (i - a[i] + n) % n;

            ++a[i];
        }

        visited[a[i]] = true;
        if (a[i] > max)
            max = a[i];
    }

    if (max == n)
        return 0;
    int cnt = max - n;
    int returning = cnt;
    --cnt;

    int lastunused = max - 1;
    while (visited[lastunused])
    {
        --lastunused;
    }

    for (int i = 0; i < n; ++i)
    {
        if (lastunused == a[i] - 1)
        {
            while (lastunused > n)
            {
                a[i] = lastunused;
                ans[cnt] = lastunused;
                --cnt;
                --lastunused;

                while (visited[lastunused])
                {
                    --lastunused;
                }
            }

            a[i] = (i + diff) % n;
            ++a[i];
            ans[cnt] = a[i];
            --cnt;
            if (cnt == -1)
                return returning;
        }
    }

    for (int i = 0; i < n; ++i)
    {
        if (a[i] <= n)
            continue;
        if (lastunused <= n)
        {
            a[i] = (i + diff) % n;
            ++a[i];
            ans[cnt] = a[i];
            --cnt;
            if (cnt == -1)
                return returning;
        }
    }

    return returning;
}

//----------------------

int countReplacement(int n, int inputSeq[])
{
  return -3;
}

Compilation message (stderr)

gondola.cpp: In function 'int replacement(int, int*, int*)':
gondola.cpp:52:9: warning: unused variable 'model' [-Wunused-variable]
     int model[100010] = { 0 };
         ^~~~~

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 10 / 10
• Subtask 4: 0 / 5
• Subtask 5: 0 / 10
• Subtask 6: 0 / 20
• Subtask 7: 0 / 5
• Subtask 8: 0 / 15
• Subtask 9: 0 / 15
• Subtask 10: 0 / 10