Submission #622628

#	Time	Username	Problem	Language	Result	Execution time	Memory
622628		froxyy	Rack (eJOI19_rack)	C++14	40 / 100	107 ms	102400 KiB

rack

#include <bits/stdc++.h>
using namespace std;
#define fast ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
typedef long long ll;typedef long double ld;typedef pair<int,int> pii;
#define F first
#define S second
#define PB push_back
#define MP make_pair
const ll mod = 1e9+7, N = 2e6+7, M = 2e6+7, INF = INT_MAX/10;
ll powe(ll x, ll y){ x = x%mod, y=y%(mod-1);ll ans = 1;while(y>0){if (y&1){ans = (1ll * x * ans)%mod;}y>>=1;x = (1ll * x * x)%mod;}return ans;}




void solve(){
	ll n, k;
    cin >> n >> k;

    vector<ll> v = {1};
    vector<ll> ans = {1};
    ll x = pow(2, n-1);
    while(x >= 1 || ans.size() < k)
    {
        for(size_t i=0; i<v.size(); i++)
            ans.PB(v[i] + x);
        
        x /= 2;
        for(size_t i=v.size(); i<ans.size(); i++)
            v.PB(ans[i]);
    }

    cout << ans[k-1] << '\n';

    //for(size_t i=0; i<ans.size(); i++)
        //cout << ans[i] << ' ';   
}




signed main(){
    fast;
    int t = 1;
    //cin >> t;
    while(t--){
    	solve();
    }
    return 0;
}

Compilation message (stderr)

rack.cpp: In function 'void solve()':
rack.cpp:22:32: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare]
   22 |     while(x >= 1 || ans.size() < k)
      |                     ~~~~~~~~~~~^~~

• Subtask 1: 20 / 20
• Subtask 2: 20 / 20
• Subtask 3: 0 / 60