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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. #define ll long long
  5. #define FOR(i, k, n) for (int i = (k), _n = (n); i <= _n; i++)
  6. #define FOV(i, k, n) for (int i = (n), _n = (k); i >= _n; i--)
  7. #define REP(i, n) FOR(i, 1, n)
  8. #define REV(i, n) FOV(i, 1, n)
  9.  
  10. string s, ans;
  11. char tmp;
  12.  
  13. int main() {
  14.     ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  15.  
  16.     if (fopen("input.txt", "r")) {
  17.         freopen("input.txt", "r", stdin);
  18.         freopen("output.txt", "w", stdout);
  19.     }
  20.  
  21.     cin >> s;
  22.     int n = s.size();
  23.     ans += s[0];
  24.     tmp = s[0];
  25.  
  26.     REP(i, n - 1) {
  27.         if (s[i] != s[i - 1]) {
  28.             ans += s[i];
  29.         }
  30.     }
  31.  
  32.     cout << ans;
  33.  
  34.     return 0;
  35. }
Success #stdin #stdout 0s 5320KB
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language:

						
C++14 (gcc 8.3)

					

					

						
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12 hours ago

					

					

						
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