Training ticket


Session
ID: training8FGFKMEBF
Time limit: 120 min.

Status: closed
Created on:
20151023 11:42 UTC
Started on:
20151023 11:42 UTC
Finished on:
20151023 11:43 UTC


Tasks in test  Correctness  Performance  Task score  

1
FrogJmp
Submitted in: Java



100%

A small frog wants to get to the other side of the road. The frog is currently located at position X and wants to get to a position greater than or equal to Y. The small frog always jumps a fixed distance, D.
Count the minimal number of jumps that the small frog must perform to reach its target.
Write a function:
class Solution { public int solution(int X, int Y, int D); }
that, given three integers X, Y and D, returns the minimal number of jumps from position X to a position equal to or greater than Y.
For example, given:
X = 10 Y = 85 D = 30the function should return 3, because the frog will be positioned as follows:
 after the first jump, at position 10 + 30 = 40
 after the second jump, at position 10 + 30 + 30 = 70
 after the third jump, at position 10 + 30 + 30 + 30 = 100
Assume that:
 X, Y and D are integers within the range [1..1,000,000,000];
 X ≤ Y.
Complexity:
 expected worstcase time complexity is O(1);
 expected worstcase space complexity is O(1).
// you can also use imports, for example:
// import java.util.*;
// you can write to stdout for debugging purposes, e.g.
// System.out.println("this is a debug message");
import java.lang.Math;
class Solution {
public int solution(int X, int Y, int D) {
// write your code in Java SE 8
return (int) Math.ceil((double)(YX)/D);
}
}
// you can also use imports, for example:
// import java.util.*;
// you can write to stdout for debugging purposes, e.g.
// System.out.println("this is a debug message");
import java.lang.Math;
class Solution {
public int solution(int X, int Y, int D) {
return (int) Math.ceil((double)(YX)/D);
}
}
// you can also use imports, for example:
// import java.util.*;
// you can write to stdout for debugging purposes, e.g.
// System.out.println("this is a debug message");
import java.lang.Math;
class Solution {
public int solution(int X, int Y, int D) {
return (int) Math.ceil((double)(YX)/D);
}
}
// you can also use imports, for example:
// import java.util.*;
// you can write to stdout for debugging purposes, e.g.
// System.out.println("this is a debug message");
import java.lang.Math;
class Solution {
public int solution(int X, int Y, int D) {
return (int) Math.ceil((double)(YX)/D);
}
}
The solution obtained perfect score.
https://codility.com/demo/takesampletest/frog_jmp/