x=float(input())
y=float(input())
z=float(input())
if x+y>z and x+z>y and y+z>x: print('Y')
else: print('N')

并不追求行数的养老代码

import java.util.Scanner;
public class Main{
    public static void main(String[] args){
        Scanner s=new Scanner(System.in);
        float a=s.nextFloat();
        float b=s.nextFloat();
        float c=s.nextFloat();
        char ans='N';
        if(a+b>c&&b+c>a&&a+c>b){
            ans='Y';
        }
        System.out.println(ans);
        s.close();
    }
}

#python3

a=float(input())
b=float(input())
c=float(input())
if a+b>c and b+c>a and a+c>b:
    print("Y")
else:
    print("N")

a=float(input())
b=float(input())
c=float(input())
if a+b<=c:print("N")
elif a+c<=b:print("N")
elif b+c<=a:print("N")
else:print("Y")

快活啊
#include<iostream>
using namespace std;
int main()
{
float a,b,c;
cin>>a>>b>>c;
if(a+b>c&&a+c>b&&b+c>a) cout<<"Y";
else cout<<"N";
}

a=float(input())
b=float(input())
c=float(input())
if a+b>c and b+c>a:
print("Y")
else:
print("N")