5
-114514 -993244853 -998244353 -10086 -12345
1 2
2 3
3 4
4 5

这份数据，应该输出 -10086 但是

• https://www.luogu.com.cn/blog/20020801wyc/zui-tai-zi-shu-hu
• https://www.luogu.com.cn/blog/xky-666/solution-p1122
• https://www.luogu.com.cn/blog/freddie/solution-p1122
• https://llzzxx712.blog.luogu.org/solution-p1122
• https://www.luogu.com.cn/blog/sishaojunakioi/sishaojunakioi
• https://www.luogu.com.cn/blog/motherfucker-mengyu/zui-tai-zi-shu-hu
• https://www.luogu.com.cn/blog/virus2017/p1122-zui-tai-zi-shu-hu-shu-xing-dp
• https://www.luogu.com.cn/blog/jzy-qwq/solution-p1122
• https://www.luogu.com.cn/blog/ljlljlljl/solution-p1122
• https://www.luogu.com.cn/blog/Multifuctional/solution-p1122
• https://www.luogu.com.cn/blog/user47497/solution-p1122
• https://www.luogu.com.cn/blog/user14130/solution-p1122
• https://www.luogu.com.cn/blog/user25799/solution-p1122
• https://www.luogu.com.cn/blog/user23769/solution-p1122

都会输出0。
原因：ans没赋初值/ans=0