cin，cout 的箭头等等。
这个帖子不准水楼，务必要求真实。。。
cin写在if后
乘号打错，等于少写一个
一个等号是赋值，两个等号才是判等！
if(ans < s.size()) ans = s.size();
yes输错
main 函数 写成 mian *2!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
大小写错误——(;´༎ຶД༎ຶ`)
==写成=
变量错误（int的是a,但写着就成b......）(；´д｀)ゞ
“freopen("A.in", "r", stdin);”写成了“freopen("A,in", "r", stdin);”
共 122 条回复
cin写在if后
乘号打错，等于少写一个
一个等号是赋值，两个等号才是判等！
if(ans < s.size()) ans = s.size();
yes输错
main 函数 写成 mian *2!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
大小写错误——(;´༎ຶД༎ຶ`)
==写成=
变量错误（int的是a,但写着就成b......）(；´д｀)ゞ
“freopen("A.in", "r", stdin);”写成了“freopen("A,in", "r", stdin);”