「BZOJ1349」[Baltic2006] Squint

2014年7月28日2,8490

Description

Write a program to calculate integer square roots.

Input

The input is read from a text file named squint.in. Its only line consists of an integer 0 < = n < 2^63 .

Output

Its only line consists of the smallest nonnegative integer q such that q^2 >= n .

Sample Input

122333444455555

Sample Output

11060446

HINT

sqrt(122333444455555)=11060445.038765619 .

题解

直接sqrt(n) 真是神题啊

#include<iostream>
#include<cstdio>
#include<cstring>
#include<cmath>
#include<algorithm>
#define ll long long
#define inf 1000000000
using namespace std;
inline ll read()
{
    ll x=0,f=1;char ch=getchar();
    while(ch<'0'||ch>'9'){if(ch=='-')f=-1;ch=getchar();}
    while(ch>='0'&&ch<='9'){x=x*10+ch-'0';ch=getchar();}
    return x*f;
}
ll n,ans;
int main()
{
	n=read();
	ans=sqrt(n);
	if(ans*ans!=n)ans++;
	printf("%lld",ans);
	return 0;
}

#include<iostream>

#include<cstdio>

#include<cstring>

#include<cmath>

#include<algorithm>

#define ll long long

#define inf 1000000000

using namespace std;

inline ll read()

{

ll x=0,f=1;char ch=getchar();

while(ch<'0'||ch>'9'){if(ch=='-')f=-1;ch=getchar();}

while(ch>='0'&&ch<='9'){x=x*10+ch-'0';ch=getchar();}

return x*f;

}

ll n,ans;

int main()

{

n=read();

ans=sqrt(n);

if(ans*ans!=n)ans++;

printf("%lld",ans);

return 0;

}

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「BZOJ1349」[Baltic2006] Squint

Description

Input

Output

Sample Input

Sample Output

HINT

题解

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