BZOJ 1349: [Baltic2006]Squint 题解

1349: [Baltic2006]Squint

Time Limit: 1 Sec Memory Limit: 64 MB
Submit: 572 Solved: 338

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Description

Write a program to calculate integer square roots.

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Input

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

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Output

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

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Sample Input

122333444455555

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Sample Output

11060446

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HINT

sqrt(122333444455555)=11060445.038765619 .

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Source

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题解：

哇这种题还需要题解嘛

#include<cstdio>#include<iostream>#include<cmath>using namespace std;long long a,b;int main(){    scanf("%lld",&a);b=sqrt(a);    if(b*b==a) printf("%lld",b);    else       printf("%lld",b+1);     return 0;}