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  1. //Line 26 correction
  2.  
  3. #include<bits/stdc++.h>
  4.  
  5. using namespace std;
  6.  
  7. int main()
  8. {
  9.      int t;
  10.      cin>>t;
  11.  
  12.      while(t--)
  13.      {
  14.           int n;
  15.           cin>>n;
  16.  
  17.           string str;
  18.           cin>>str;
  19.           string str2=str;
  20.           if(n==1)
  21.           {
  22.                if(str[0]=='0')
  23.                     cout<<"1\n";
  24.                else
  25.                     cout<<"0\n";
  26.                continue;
  27.           }
  28.           int cnt=0;
  29.           for(int i=0;i<n;i++)
  30.           {
  31.                if(i==0&&(str[0]=='1'||str[1]=='1'))
  32.                     cnt++;
  33.                else if(i==n-1&&(str[i]=='1'||str[i-1]=='1'))
  34.                     cnt++;
  35.                else if(str[i]=='1'||str[i+1]=='1'||str[i-1]=='1')
  36.                     cnt++;
  37.           }
  38.           cout<<n-cnt<<"\n";
  39.      }
  40.  
  41. }
  42.  
Success #stdin #stdout 0s 4256KB
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https://ideone.com/5hPRQA
1
5
00100
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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