@[C2020陈铭浩](/user/307603) AC了！！！
```cpp
#include<iostream>
#include<cstdio>
#include<algorithm>
#include<cstring>
#include<cmath>
#include<string>
#include<cstdlib>
using namespace std;
string now,f;
char s[100010][10010],ss[100010][10010];
int cnt,ans,x,cnt2;
int main(){
while(getline(cin,now)){
if(now=="EOF") break;
cnt++;
int cl=0;
for(int i=0;i<now.length();i++){
if(now[i]=='<'){
cl--;
if(cl<0) cl=0;
continue;
}
s[cnt][cl]=now[i];
cl++;
}
}
while(getline(cin,f)){
if(f=="EOF") break;
cnt2++;
int cl=0;
for(int i=0;i<f.length();i++){
if(f[i]=='<'){
cl--;
if(cl<0) cl=0;
continue;
}
ss[cnt2][cl]=f[i];
cl++;
}
for(int j=0;j<cl;j++)
if(ss[cnt2][j]==s[cnt2][j]) ans++;
}
cin>>x;
cout<<(int)((ans*1.0)/(x*1.0)*60+0.5);
return 0;
}
```
by Interstice @ 2020-07-15 19:35:13
https://www.luogu.com.cn/record/35193969
by Interstice @ 2020-07-15 19:35:43
@[李东齐01](/user/342371) 谢谢！！
by _cmh @ 2020-07-15 20:23:19