Counter

#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")

#include <iostream>
#include <algorithm>
#include <vector>
#include <cmath>
#include <queue>
#include <climits>
#include <map>
using namespace std;
typedef long long ll;

void task7() {

   ll x;
    cin >> x;
    
    vector<ll> dist(x + 1, -1);
    queue<ll> q;
    
    q.push(0);
    dist[0] = 0;
    
    while(!q.empty()){
        ll curr = q.front();
        q.pop();
        
        if(curr == x){
            cout << dist[x] << endl;
            return;
        }
        
        if(curr + 11 <= x && dist[curr + 11] == -1){
            dist[curr + 11] = dist[curr] + 1;
            q.push(curr + 11);
        }
        
        if(curr - 2 >= 0 && dist[curr - 2] == -1){
            dist[curr - 2] = dist[curr] + 1;
            q.push(curr - 2);
        }
    }
    
    cout << -1 << endl;

}

void task3(){
    ll n;
    cin >> n;
    
    const ll MOD = 1000000007;
    vector<ll> dp(n + 1, 0);
    dp[0] = 1;
    
    for(ll i = 1; i <= n; i++){
        for(ll j = 1; j <= 6; j++){
            if(i - j >= 0){
                dp[i] = (dp[i] + dp[i - j]) % MOD;
            }
        }
    }
    
    cout << dp[n] << endl;
}

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

    task7();

}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED

Test 11

Verdict: ACCEPTED

Test 12

Verdict: ACCEPTED

Test 13

Verdict: ACCEPTED

Test 14

Verdict: ACCEPTED

Test 15

Verdict: ACCEPTED

Test 16

Verdict: ACCEPTED

Test 17

Verdict: ACCEPTED

Test 18

Verdict: ACCEPTED

Test 19

Verdict: ACCEPTED

Test 20

Verdict: ACCEPTED

Test 21

Verdict: ACCEPTED

Test 22

Verdict: ACCEPTED

Test 23

Verdict: ACCEPTED

Test 24

Verdict: ACCEPTED

Test 25

Verdict: ACCEPTED

Test 26

Verdict: ACCEPTED

Test 27

Verdict: ACCEPTED