oj.uz

Submission #439630

# Submission time Handle Problem Language Result Execution time Memory
439630 2021-06-30T11:36:32 Z LucaIlie Rack (eJOI19_rack) C
40 / 100
 17 ms 8104 KB 
#include <stdio.h>
 
#define MAX_N 1000000
#define MAX_LG 62
#define MOD 1000000007
 
long long p2[MAX_N + 1];
 
int main() {
    int n, r, i;
    long long k;
 
    scanf( "%d%lld", &n, &k );
    k--;
 
    p2[0] = 1;
    for ( i = 1; i <= MAX_LG; i++ )
        p2[i] = p2[i - 1] * 2;
    for ( i = MAX_LG; i <= MAX_N; i++ )
        p2[i] = (p2[i - 1] % MOD * 2) % MOD;
 
    r = 0;
    for ( i = MAX_LG; i >= 0; i-- ) {
        if ( (k / p2[i]) % 2 == 1 )
            r = (p2[n - 1 - i] + r) % MOD;
    }
 
    printf( "%d", r + 1 );
 
    return 0;
}

Compilation message

rack.c: In function 'main':
rack.c:13:5: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |     scanf( "%d%lld", &n, &k );
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 8012 KB Output is correct
2 Correct 15 ms 8104 KB Output is correct
3 Correct 15 ms 8080 KB Output is correct
4 Correct 15 ms 8012 KB Output is correct
5 Correct 15 ms 8012 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 8012 KB Output is correct
2 Correct 15 ms 8104 KB Output is correct
3 Correct 15 ms 8080 KB Output is correct
4 Correct 15 ms 8012 KB Output is correct
5 Correct 15 ms 8012 KB Output is correct
6 Correct 16 ms 8012 KB Output is correct
7 Correct 15 ms 8020 KB Output is correct
8 Correct 16 ms 8012 KB Output is correct
9 Correct 17 ms 8012 KB Output is correct
10 Correct 15 ms 8016 KB Output is correct

Subtask #3
0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 8012 KB Output is correct
2 Correct 15 ms 8104 KB Output is correct
3 Correct 15 ms 8080 KB Output is correct
4 Correct 15 ms 8012 KB Output is correct
5 Correct 15 ms 8012 KB Output is correct
6 Correct 16 ms 8012 KB Output is correct
7 Correct 15 ms 8020 KB Output is correct
8 Correct 16 ms 8012 KB Output is correct
9 Correct 17 ms 8012 KB Output is correct
10 Correct 15 ms 8016 KB Output is correct
11 Incorrect 15 ms 8012 KB Output isn't correct
12 Halted 0 ms 0 KB -