1349: [Baltic2006]Squint

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= =

/**************************************************************
    Problem: 1349
    User: HansBug
    Language: Pascal
    Result: Accepted
    Time:0 ms
    Memory:220 kb
****************************************************************/
 
var i,j:qword;
begin
     readln(i);
     j:=trunc(sqrt(i));
     if (j*j)<>i then inc(j);
     writeln(j);readln;
end.