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Submission #587360

# Submission time Handle Problem Language Result Execution time Memory
587360 2022-07-01T17:21:27 Z Markomafko972 Rack (eJOI19_rack) C++14
100 / 100
 17 ms 8948 KB 
#include <bits/stdc++.h>

#define ll long long

using namespace std;

const ll Mod = 1e9 + 7;

int n;
ll k;
string s;
ll pot[1000007];

ll m(ll x) {
	return (x < Mod) ? x : x % Mod;
}

int main () {
	cin >> n >> k;
	
	for (int i = 0; i < n; i++) {
		if (k & 1) {
			s += '0';
		}
		else {
			s += '1';
		}
		k = (k + 1) / 2;
	}
	
	int y = s.size();
	
	pot[y-1] = 1;
	
	for (int i = y-2; i >= 0; i--) {
		pot[i] = m(pot[i+1] * 2);
	}
	
	ll res = 0;
	
	for (int i = 0; i < y; i++) {
		res = m(res + (s[i] - '0') * pot[i]);
	}
	
	cout << res+1;
	
	return 0;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 308 KB Output is correct
5 Correct 1 ms 212 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 308 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct

Subtask #3
60.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 308 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 312 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 2 ms 852 KB Output is correct
15 Correct 17 ms 8948 KB Output is correct