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  1. #include<iostream>
  2. #include<sstream>
  3. #include<string>
  4. using namespace std ;
  5. int F(int n , int a , int b){
  6.     if(n==0) return a ;
  7.     if(n==1) return b ;
  8.     int f[n];
  9.     f[0] = a ; f[1]=b ;
  10.     for(int i = 2 ; i<= n ;i++){
  11.         f[i]=f[i-1]+f[i-2] ;
  12.     }
  13.     return f[n];
  14. }
  15. int main(){
  16.     int num_line ;
  17.     int a,b,n,m ,t;
  18.     stringstream ss ;
  19.     string tem , ans ;
  20.     cin >> num_line ;
  21.     for(int i= 0 ;i<num_line;i++){
  22.  
  23.         cin>>a>>b>>n>>m;
  24.         ss << F(n,a,b);
  25.         ss >> tem ;
  26.         t = tem.size();
  27.         if((t-m)<0) m = t;
  28.         //本來是寫 if((tem.size()-m)<0) m = tem.size();
  29.         //後來多寫了一個t才正確
  30.         //檢查的時候發現 cout << tem.size()-2 是一個奇怪的數（很像是輸出一個沒有賦值的數
  31.         for(int i = 0 ;i<m ;i++){
  32.             if(i == 0&&tem[tem.size()-m+i]=='0') continue;
  33.             cout << tem[tem.size()-m+i];
  34.         }
  35.         ss.clear();
  36.         ss.str("");
  37.  
  38.     }
  39.  
  40.  
  41. }
Success #stdin #stdout 0s 4560KB
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Standard input is empty
stdout
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Standard output is empty
https://ideone.com/5dYVz5
language:
C++ (gcc 8.3)
created:
8 years ago
visibility:
secret

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