Cod sursa(job #2137137)

Utilizator inquisitorAnders inquisitor Data 20 februarie 2018 17:11:58
Problema Radix Sort Scor 30
Compilator cpp Status done
Runda Arhiva educationala Marime 1.48 kb
#include <cstdio>
#include <queue>

unsigned int N, A, B, C, v[10000000], p;

void RadixSort(unsigned int v[], unsigned int begin, unsigned int end)
{
    std :: queue<unsigned int> bucket[256];

    for(int j = 0; j < 4; ++j)
    {
        for(int i = begin; i != end; ++i)
        {
            bucket[v[i] >> (j << 3) & 255].push(v[i]);
        }

        int index = begin;

        for(int i = 0; i < 256; ++i)
        {
            while(!bucket[i].empty())
            {
                v[index++] = bucket[i].front();

                bucket[i].pop();
            }
        }
    }
}

char outBuffer[11000000];

void inline itoa(unsigned int x)
{
    unsigned int y, digits = x > 999999999 ? 10 : x > 99999999 ? 9 : x > 9999999 ? 8 : x > 999999 ? 7 : x > 99999 ? 6 : x > 9999 ? 5 : x > 999 ? 4 : x > 99 ? 3 : x > 9 ? 2 : 1;

    for(unsigned int i = digits - 1; ~i; --i)
    {
        y = x / 10;

        outBuffer[p + i] = x - (y << 1) - (y << 3) + 48;

        x = y;
    }

    p += digits; outBuffer[p++] = 32;
}

int main()
{
    freopen("radixsort.in", "r", stdin);
    freopen("radixsort.out", "w", stdout);

    scanf("%d %d %d %d", &N, &A, &B, &C);

    *v = B;

    for(unsigned int j, i = 1; i < N; ++i)
    {
        j = 1ULL * v[~-i] * A + B;

        v[i] = C > j ? j : j - j / C * C;
    }

    RadixSort(v, 0, N);

    for(unsigned int i = 0; i < N; i += 10)
    {
        itoa(v[i]);
    }

    puts(outBuffer);
}