oj.uz

Submission #969424

# Submission time Handle Problem Language Result Execution time Memory
969424 2024-04-25T06:45:02 Z HasanV11010238 Rack (eJOI19_rack) C++17
40 / 100
 1 ms 348 KB 
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define mod 1000000007
int am = 0;
ll binpow(ll a, ll b){
    ll res = 1;
    if (b == -1){
        return 0;
    }
    while (b != 0){
        if (b % 2 == 0){
            b /= 2;
            a *= a;
            if (a >= mod){
                am++;
            }
            a %= mod;
        }
        else{
            b -= 1;
            res *= a;
            if (res >= mod){
                am++;
            }
            res %= mod;
        }
    }
    return res;
}
 
ll f(ll n, ll k, ll va){
    ll val = 0;
    if (n == 0){
        return val;
    }
    am = 0;
    ll po = binpow(2, n - 1);
    if ((am == 0 && k >= po)){
        val += binpow(2, va);
        return (val + f(n - 1, k - po, va + 1)) % mod;
    }
    else if ((am == 1 && k >= po * mod)){
        val += binpow(2, va);
        return (val + f(n - 1, k - po * mod, va + 1)) % mod;
    }
    return (val + f(n - 1, k, va + 1)) % mod;
}
int main(){
    int n, k;
    cin>>n>>k;
    k--;
    cout<<(f(n, k, 0) + 1) % mod;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct

Subtask #3
0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 344 KB Output is correct
12 Incorrect 0 ms 348 KB Output isn't correct
13 Halted 0 ms 0 KB -