Submission #466163

#	Time	Username	Problem	Language	Result	Execution time	Memory
466163		ardaak33	Rack (eJOI19_rack)	C++17	40 / 100	1077 ms	204 KiB

rack

#include<bits/stdc++.h>
using namespace std;
long long int kuvvet[1000005];
long long int mod = 1e9 + 7;
long long int sayac=1;
vector <long long int> us;
bool bayrak=false;
void yap(int n,int k,int sinir) {
if(sayac==k){
bayrak=true;
return;
}

for (int i = n; i > sinir; i--)
{
sayac++;
yap(n,k,i);
if(bayrak==true){
    //cout << i<<endl;
us.push_back(i-1); 
return;

}
}


}
int main() {
    cin.tie(0);cout.tie(0);ios_base::sync_with_stdio(false);
long long int n,k;
cin >> n >> k;

yap(n,k,0);
long long int sonuc=0;

kuvvet[0]=1;
for (int i = 0; i < us.size(); i++)
{

for (int j = 0; j<= us[i]; j++)
{
    if(kuvvet[us[i]]!=0){
    sonuc+=kuvvet[us[i]];
    sonuc%=mod;
    //cout <<kuvvet[us[i]];
    break;
    }
    if(kuvvet[j+1]!=0)
    continue;
    kuvvet[j+1]=kuvvet[j]*2;
    kuvvet[j+1]%=mod;
    //cout << kuvvet[j+1] << endl;
}



}
cout << (sonuc+1)%mod;

}

Compilation message (stderr)

rack.cpp: In function 'int main()':
rack.cpp:37:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 | for (int i = 0; i < us.size(); i++)
      |                 ~~^~~~~~~~~~~

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