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描述
给定三个正整数，分别表示三条线段的长度，判断这三条线段能否构成一个三角形。
输入共三行，包含三个正整数，分别表示三条线段的长度
输出格式
如果能构成三角形，则输出“yes” ，否则输出“no”。
输入样例 1
3
4
5
输出样例 1
yes
输入样例 2
2
2
2
输出样例 2
yes
输入样例 3
1
1
2
输出样例 3
no
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