oj.uz

Submission #973277

# Submission time Handle Problem Language Result Execution time Memory
973277 2024-05-01T17:24:24 Z terracottalite Rack (eJOI19_rack) C++14
100 / 100
 1 ms 600 KB 
#include <stdio.h>

#define MOD 1000000007

long long fastpow(long long base, long long exp) {
	if (exp == 0) return 1;
	long long x = fastpow(base, exp / 2);
	x = (x * x)%MOD;
	if (exp&1) x = (x * base)%MOD;
	return x;
}

int main()
{
	long long n, k;
	scanf("%lld %lld", &n, &k);

	k--;

	long long z = n-1;

	long long ans = 0;

	while (k) {
		if (k&1) ans = (ans + fastpow(2, z))%MOD;
		z--;
		k >>= 1;
	}

	ans = (ans + 1)%MOD;

	printf("%lld\n", ans);
}

Compilation message

rack.cpp: In function 'int main()':
rack.cpp:16:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |  scanf("%lld %lld", &n, &k);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~~

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 0 ms 348 KB Output is correct
5 Correct 0 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 0 ms 348 KB Output is correct
5 Correct 0 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 600 KB Output is correct
10 Correct 0 ms 348 KB Output is correct

Subtask #3
60.0 / 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 0 ms 348 KB Output is correct
5 Correct 0 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 600 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct