#include <bits/stdc++.h> #define sz(x) (int)x.size() #define all(x) x.begin(), x.end() #define rall(x) x.rbegin(), x.rend() //#define int long long using namespace std; using ll = long long; using ull = unsigned long long; using ld = long double; using pii = pair<int, int>; using pll = pair<ll, ll>; const int mod = 1e9 + 7; const int LOG = 20; const int maxn = 1e5 + 5; const double eps = 1e-9; int32_t main() { ll a, b, ans=0; cin >> a >> b; for(ll i=a; i<=b; i++) { bool ok = 1; string s = to_string(i); for(int j=0; j+1<s.size(); j++) { if(s[j] == s[j+1]) ok = 0; if(j+2 < s.size() && s[j] == s[j+2]) ok = 0; } ans += ok; } cout << ans << '\n'; return 0; }

numbers.cpp: In function 'int32_t main()':
numbers.cpp:28:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |         for(int j=0; j+1<s.size(); j++) {
      |                      ~~~^~~~~~~~~
numbers.cpp:30:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |             if(j+2 < s.size() && s[j] == s[j+2]) ok = 0;
      |                ~~~~^~~~~~~~~~