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Submission #982511

# Submission time Handle Problem Language Result Execution time Memory
982511 2024-05-14T10:33:46 Z Nomio Rack (eJOI19_rack) C++17
40 / 100
 1 ms 348 KB 
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int mod = 1e9 + 7;
int main() {
	int n;
	ll k;
	cin >> n >> k;
	if(k == 1) {
		cout << 1 << '\n';
		return 0;
	}
	ll S = 0;
	int m = 0;
	while((1LL << m) < k) {
		m++;
	}
	while(k > 1) {
		S += (1LL << (n - m));
		S %= mod;
		k -= (1LL << (m - 1));
		while((1LL << (m - 1)) >= k) {
			m--;
		}
	}
	if(k == 1) {
		S++;
		S %= mod;
	}
	cout << S << '\n';
	return 0;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 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 344 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 348 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 0 ms 348 KB Output is correct

Subtask #3
0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 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 348 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 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Incorrect 0 ms 348 KB Output isn't correct
13 Halted 0 ms 0 KB -