Educational Codeforces Round 80 (Rated for Div. 2(A Deadline )

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(A) Deadline

题目:

技术图片

 

 技术图片

 

 思路:一开始还傻傻的暴力康康。。。。只要求出令x=n的一半就行,然后判断

 1 #include<bits/stdc++.h>
 2 using namespace std;
 3 int main()
 4 {
 5     //freopen("text","r",stdin);
 6     int T;
 7     scanf("%d",&T);
 8     while(T--)
 9     {
10         //cout<<ceil(0.0)<<endl;
11         long long n,d;
12         cin>>n>>d;
13         if(d<=n)
14             printf("YES
");
15         else
16         {
17             double a=n/2;
18             double b=ceil(d/(a+1));
19             if(a+b<=n)
20                 printf("YES
");
21             else
22                 printf("NO
");
23         }
24     }
25     return 0;
26 }

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