1 #include<bits/stdc++.h>
 2 using namespace std;
 3 int main(){
 4     int N;
 5     char t;
 6     cin>>N;
 7     string s="";
 8     string A="",T="",H=""; 
 9     for(int i=0;i<N-1;i++){
10         //s初始设为"n-1个‘(‘"
11         s+=‘(‘;  
12     }
13     
14     for(int i=1;i<=N;i++){
15         //A[i]="A" + "sin(" + "i" + "i个)" 
16         T+=‘)‘;//T是‘)‘的叠加体 
17         A+="sin(";
18         t=‘0‘+i;
19         A+=t;//A是A[i]的叠加体 
20         H=A+T;  //H表示A[i] 
21         
22         //s="s" + "H" + "+" + "n-i+1" + "1个)" 
23         s+=H;
24         s+=‘+‘;
25         t=‘0‘+(N-i+1);
26         s+=t;
27         if(i!=N) s+=‘)‘;
28         
29         //为下一个A[i]做准备 加上正负号 
30         if(i%2==1) A+=‘-‘;
31         else A+=‘+‘;
32     }
33     
34     cout<<s<<endl;
35 }