Submission #1064155

#	Time	Username	Problem	Language	Result	Execution time	Memory
1064155		damjandavkov	Gondola (IOI14_gondola)	C++17	90 / 100	14 ms	6236 KiB

gondola

#include "gondola.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
int valid(int n, int v[])
{
    int i, x = -1, y;
    vector<bool> w(250000, 0);
    for (i = 0; i < n; i++)
    {
        v[i]--;
        if (w[v[i]])
            return 0;
        w[v[i]] = 1;
        if (v[i] < n)
        {
            y = v[i] - i;
            if (y < 0)
                y += n;
            if (x == -1)
                x = y;
            if (x != y)
                return 0;
        }
    }
    return 1;
}
int replacement(int n, int v[], int rS[])
{
    int i, x = -1, y, t = n, j = 0;
    vector<bool> w(250000, 0);
    vector<vector<int> > in(n);
    for (i = 0; i < n; i++)
    {
        v[i]--;
        if (w[v[i]])
            return 0;
        w[v[i]] = 1;
        if (v[i] < n)
        {
            y = v[i] - i;
            if (y < 0)
                y += n;
            if (x == -1)
                x = y;
            if (x != y)
                return 0;
        }
    }
    if (x == -1)
        x = 0;
    for (i = 0; i < n; i++)
        in[(i + x) % n] = {v[i], (i + x) % n};
    sort(in.begin(), in.end());
    for (i = 0; i < n; i++)
    {
        if (in[i][0] < n)
            continue;
        rS[j] = in[i][1] + 1;
        j++;
        t++;
        while (t <= in[i][0])
        {
            rS[j] = t;
            j++;
            t++;
        }
    }
    return j;
}
ll r = 1000000009, p;
ll po(ll a, int b)
{
    if (!b)
        return 1;
    ll t = po(a, b / 2);
    t *= t;
    t %= r;
    if (b % 2)
        return t * a % r;
    return t;
}
int countReplacement(int n, int v[])
{
    int i, x = -1, y, t = n, m;
    vector<bool> w(250000, 0);
    vector<int> in;
    for (i = 0; i < n; i++)
    {
        v[i]--;
        if (w[v[i]])
            return 0;
        w[v[i]] = 1;
        if (v[i] < n)
        {
            y = v[i] - i;
            if (y < 0)
                y += n;
            if (x == -1)
                x = y;
            if (x != y)
                return 0;
        }
        else
            in.push_back(v[i]);
    }
    m = in.size();
    sort(in.begin(), in.end());
    if (m == n)
        p = n;
    else
        p = 1;
    for (i = 0; i < in.size(); i++)
    {
        p *= po(m - i, in[i] - t);
        p %= r;
        t = in[i] + 1;
    }
    return p;
}

Compilation message (stderr)

gondola.cpp: In function 'int countReplacement(int, int*)':
gondola.cpp:113:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  113 |     for (i = 0; i < in.size(); i++)
      |                 ~~^~~~~~~~~~~

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