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  1. #include <iostream>
  2.  
  3. #include <stdio.h>
  4.  
  5.  
  6. using namespace std;
  7.  
  8.  
  9. void fast_io(){
  10.     ios_base::sync_with_stdio(false), cin.tie(nullptr), cout.tie(nullptr);
  11.     #ifndef ONLINE_JUDGE
  12.         //freopen("input.txt", "r", stdin);
  13.     #endif
  14. }
  15.  
  16. bool isLucky(int n){
  17.     while (n > 0){
  18.         if (n%10 != 7 && n%10 != 4){
  19.             return false;
  20.         }
  21.         n /= 10;
  22.     }
  23.     return true;
  24. }
  25.  
  26. int main()
  27. {
  28.     fast_io();
  29.     int n;
  30.     cin >> n;
  31.     string magnets[n];
  32.     int groups = 1;
  33.     for (int i = 0; i < n; i++){
  34.         cin >> magnets[i];
  35.         if (i > 0 && magnets[i-1] != magnets[i]){
  36.             groups++;
  37.         }
  38.     }
  39.     cout << groups;
  40. }
Success #stdin #stdout 0s 5284KB
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stdin
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6
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stdout
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3
https://ideone.com/6aUoLd
language:
C++ (gcc 8.3)
created:
19 days ago
visibility:
public

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