Submission #1120480

#	Time	Username	Problem	Language	Result	Execution time	Memory
1120480		vjudge1	Palindrome-Free Numbers (BOI13_numbers)	C++17	28.33 / 100	1087 ms	504 KiB

numbers

#include <bits/stdc++.h>
using namespace std;
 
#define SPEED                     \
    ios_base::sync_with_stdio(0); \
    cin.tie(NULL);                \
    cout.tie(NULL);
 
#define pb push_back
#define endl "\n"
#define ALL(x) x.begin(), x.end()
#define intt long long
 
const intt mxN = 2e5 + 5;

void solve() {
    intt a, b;
    cin >> a >> b;
    intt ans = 0;
    for(intt cur = a; cur <= b; cur++) {
        string s = to_string(cur);
        bool ok = true;
        for(intt i = 1; i < s.size(); i++) {
            if(s[i] == s[i-1]) {
                continue;
            }
        }
        if(s.size() == 3) {
            if(s[0] == s[1] || s[1] == s[2] || s[0] == s[2]) {
                continue;
            }
        }
        for(intt i = 0; i < s.size(); i++) {
            for(intt j = i + 1; j < s.size(); j++) {
                string t = "";
                for(intt k = i; k <= j; k++) t += s[k];
                string c = t;
                reverse(ALL(c));
                if(c == t) {
                    ok = false;
                    break;
                }
            }
            if(!ok) break;
        }
        ans += ok;
    }
    cout << ans << endl;
}

int main(){
    SPEED;
    int tst = 1, i = 1;
    // cin >> tst;
    while(tst--) {
        solve();
    }
    return 0;
}

Compilation message (stderr)

numbers.cpp: In function 'void solve()':
numbers.cpp:23:27: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |         for(intt i = 1; i < s.size(); i++) {
      |                         ~~^~~~~~~~~~
numbers.cpp:33:27: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |         for(intt i = 0; i < s.size(); i++) {
      |                         ~~^~~~~~~~~~
numbers.cpp:34:35: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |             for(intt j = i + 1; j < s.size(); j++) {
      |                                 ~~^~~~~~~~~~
numbers.cpp: In function 'int main()':
numbers.cpp:53:18: warning: unused variable 'i' [-Wunused-variable]
   53 |     int tst = 1, i = 1;
      |                  ^

• Subtask 1: 25 / 25
• Subtask 2: 3.3333333333333335 / 75