Submission #755433

#	Time	Username	Problem	Language	Result	Execution time	Memory
755433		The_Samurai	Palindrome-Free Numbers (BOI13_numbers)	C++17	36.67 / 100	1093 ms	296 KiB

numbers

#include <bits/stdc++.h>

using namespace std;
using ll = long long;

bool check(ll n) {
    string s = to_string(n);
    for (int i = 0; i < s.size(); i++) {
        if (i + 1 < s.size() and s[i] == s[i + 1]) return false;
        if (i + 2 < s.size() and s[i] == s[i + 2]) return false;
    }
    return true;
}

int get(ll l, ll r) {
    int ans = 0;
    for (ll i = l; i <= r; i++) ans += check(i);
    return ans;
}

ll get(ll n) {
    if (n < 0) return 0;
    if (n < 10) return n + 1;
    ll ans = 10;
}

int main() {
    ios_base::sync_with_stdio(false); cin.tie(nullptr);

    ll l, r;
    cin >> l >> r;
    cout << get(l, r);

    return 0;
}

Compilation message (stderr)

numbers.cpp: In function 'bool check(ll)':
numbers.cpp:8:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    8 |     for (int i = 0; i < s.size(); i++) {
      |                     ~~^~~~~~~~~~
numbers.cpp:9:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    9 |         if (i + 1 < s.size() and s[i] == s[i + 1]) return false;
      |             ~~~~~~^~~~~~~~~~
numbers.cpp:10:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |         if (i + 2 < s.size() and s[i] == s[i + 2]) return false;
      |             ~~~~~~^~~~~~~~~~
numbers.cpp: In function 'll get(ll)':
numbers.cpp:24:8: warning: unused variable 'ans' [-Wunused-variable]
   24 |     ll ans = 10;
      |        ^~~
numbers.cpp:24:8: warning: control reaches end of non-void function [-Wreturn-type]
   24 |     ll ans = 10;
      |        ^~~

• Subtask 1: 25 / 25
• Subtask 2: 11.666666666666666 / 75