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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int solve(vector<int> &A, int B) {
  5.     int first=-1;
  6.     int second=A.size();
  7.     int flag=0;
  8.     int cnt=0;
  9.     for(int i=0;i<A.size();i++)
  10.     {
  11.         if(A[i]==1)
  12.         { 
  13.             int f=i-B+1;
  14.         int g=i+B-1;
  15.         cout<<i<<" "<<f<<" "<<g<<endl;
  16.  
  17.             if(flag==0)
  18.             {
  19.                 first=f;
  20.            second=g;
  21.            cnt++; 
  22.            flag=1;
  23.             }
  24.             else
  25.             {
  26.                 if(second>=f)
  27.                {
  28.                    continue;
  29.                }  
  30.                else
  31.                 {
  32.                      cnt++;
  33.                      second=g;
  34.                  }
  35.  
  36.  
  37.              } 
  38.  
  39.  
  40.  
  41.  
  42.         }
  43.  
  44.     }
  45.     cout<<first<<" "<<second<<endl;
  46.     if(first<=0 and second>=A.size()-1)
  47.     {
  48.         return cnt;
  49.     }
  50.     else
  51.     {
  52.         return -1;
  53.     }
  54. }
  55.  
  56.  
  57. int main() {
  58.     vector<int> A = { 1,1,1, 1};
  59.     int B = 3;
  60.  
  61.     int minLights =solve(A, B);
  62.     cout << "Minimum lights to light the corridor: " << minLights << endl;
  63.  
  64.     return 0;
  65. }
  66.  
Success #stdin #stdout 0.01s 5456KB
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stdin
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Standard input is empty
stdout
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0 -2 2
1 -1 3
2 0 4
3 1 5
-2 2
Minimum lights to light the corridor: -1
https://ideone.com/TRFTBL
language:
C++14 (gcc 8.3)
created:
322 days ago
visibility:
public

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