poj2247

同1338

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#include <iostream>

#include <cstdio>

#include <cstdlib>

#include <cstring>

using namespace std;



#define maxn 6000

#define inf 0x3f3f3f3f



long long f[maxn];

int pos[4], fac[4];



char* make(int a, char *st)

{

    if (a % 10 == 1 && a % 100 != 11)

        strcpy(st, "st");

    else if (a % 10 == 2 && a % 100 != 12)

        strcpy(st, "nd");

    else if (a % 10 == 3 && a % 100 != 13)

        strcpy(st, "rd");

    else

        strcpy(st, "th");

    return st;

}



int main()

{

//    freopen("t.txt", "r", stdin);

    f[1] = 1;

    pos[0] = pos[1] = pos[2] = pos[3] = 1;

    fac[0] = 2;

    fac[1] = 3;

    fac[2] = 5;

    fac[3] = 7;

    for (int i = 2; i <= 5842; i++)

    {

        f[i] = -1;

        for (int j = 0; j < 4; j++)

            if (f[pos[j]] * fac[j] < f[i] || f[i] == -1)

                f[i] = f[pos[j]] * fac[j];

        for (int j = 0; j < 4; j++)

            if (f[pos[j]] * fac[j] <= f[i])

                pos[j]++;

    }

    int n;

    char st[3];

    while (scanf("%d", &n), n)

        printf("The %d%s humble number is %lld.\n", n, make(n, st), f[n]);

    return 0;

}