题目1214：丑数

#include <iostream>
#include <stdio.h>
#include <algorithm>
#include <math.h>
#include <string>
#include <string.h>
#include <vector>
#include <queue>
#include <stack>
#include <sstream>
using namespace std;
//1214
int ugly[1501];
int n;
void getUgly(){
    ugly[1]=1;
    int idx2=1,idx3=1,idx5=1;
    int idx=1;
    while(idx<1501){
        ugly[++idx]=min(min(ugly[idx2]*2,ugly[idx3]*3),ugly[idx5]*5);
        if(ugly[idx]==ugly[idx2]*2)
            idx2++;
        if(ugly[idx]==ugly[idx3]*3)
            idx3++;
        if(ugly[idx]==ugly[idx5]*5)
            idx5++;
    }
}
int main(){
    getUgly();
    while(cin>>n){
        cout<<ugly[n]<<endl;
    }
    return 0;
}
/**************************************************************
    Problem: 1214
    User: cust123
    Language: C++
    Result: Accepted
    Time:20 ms
    Memory:1524 kb
****************************************************************/