题目描述

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样例

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算法1

(暴力枚举) $O(n^2)$

blablabla

时间复杂度

参考文献

C++ 代码

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算法2

(暴力枚举) $O(n^2)$

blablabla

时间复杂度

参考文献

C++ 代码

let buf="";

process.stdin.on("readable",function(){
    let chunk = process.stdin.read();
    if(chunk) buf+=chunk.toString();
});

process.stdin.on("end",function(){
    let lines = buf.split('\n');
    let [x1 , y1] = lines[0].split(' ').map(x => {return parseFloat(x)});
    let [x2 , y2] = lines[1].split(' ').map(x => {return parseFloat(x)});

    let dx = x1 - x2;
    let dy = y1 - y2;
    console.log(Math.sqrt(dx * dx + dy * dy).toFixed(4));
});