#include<iostream>
#include<string.h>
#include<string>
#include<stack>
#include<queue>
#include<functional>
#include<set>
#include<stdlib.h>
#include<vector>
#include<math.h>
#include <algorithm>
#pragma warning(disable:4996)
using namespace std;
typedef long long LL;
const int coeff[3] = { 2,3,5 };
int main()
{
priority_queue<long long, vector<long long>, greater<long long> > pq;
set<LL>s;
pq.push(1);
s.insert(1);
for (int i = 1; ; i++)
{
LL x = pq.top();
pq.pop();
if (i == 1500)
{
printf("The 1500'th ugly number is %d.\n", x);
break;
}
for (int j = 0; j < 3; j++)
{
LL x2 = x*coeff[j];
if (!s.count(x2))
{
s.insert(x2);
pq.push(x2);
}
}
}
return 0;
}
F - Ugly Numbers
最新推荐文章于 2025-05-15 13:36:40 发布