1349: [Baltic2006]Squint

Time Limit: 1 Sec Memory Limit: 64 MB

Submit: 427 Solved: 248

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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 .

Source

题解：题目说的很明白了——跟我念square root——平方根= =

然后就没别的了，注意设求出的平方根为r,则({r}^{2} >= N)= =为此又逗比了几次= =

 1 /**************************************************************
 2     Problem: 1349
 3     User: HansBug
 4     Language: Pascal
 5     Result: Accepted
 6     Time:0 ms
 7     Memory:220 kb
 8 ****************************************************************/
 9  
10 var i,j:qword;
11 begin
12      readln(i);
13      j:=trunc(sqrt(i));
14      if (j*j)<>i then inc(j);
15      writeln(j);readln;
16 end.