oj.uz

Submission #439587

# Submission time Handle Problem Language Result Execution time Memory
439587 2021-06-30T09:53:27 Z LucaIlie Rack (eJOI19_rack) C
40 / 100
 1 ms 284 KB 
#include <stdio.h>

#define MOD 1000000007

int main() {
    int n, r, p2, e, i;
    long long k;

    scanf( "%d%lld", &n, &k );
    k--;

    p2 = 1;
    e = 0;
    r = 0;
    for ( i = n - 1; i >= 0; i-- ) {
        if ( ((k >> i) & 1) == 1 ) {
            while ( e < (n - 1 - i) ) {
                p2 = (p2 * 2) % MOD;
                e++;
            }
            r = (r + p2) % MOD;
        }
    }

    printf( "%d", r + 1 );

    return 0;
}

Compilation message

rack.c: In function 'main':
rack.c:9:5: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
    9 |     scanf( "%d%lld", &n, &k );
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 284 KB Output is correct
5 Correct 1 ms 204 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 284 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 1 ms 276 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct

Subtask #3
0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 284 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 1 ms 276 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Incorrect 1 ms 204 KB Output isn't correct
13 Halted 0 ms 0 KB -