oj.uz

Submission #410457

# Submission time Handle Problem Language Result Execution time Memory
410457 2021-05-22T17:39:48 Z radaiosm7 Rack (eJOI19_rack) C++
100 / 100
 10 ms 8120 KB 
#include <bits/stdc++.h>
using namespace std;
int n, i;
long long k, pos;
const long long MOD = 1000000007LL;
long long po[1000005];


int main() {
  scanf("%d%lld", &n, &k);
  pos = 1LL;
  po[0] = 1LL;

  for (i=1; i < 1000005; ++i) {
    po[i] = (po[i-1]*2LL)%MOD;
  }

  for (i=n-1; i >= 0; --i) {
    if ((k&1LL)==0LL) {
      pos = (pos+po[i])%MOD;
    }
    k = (k+1LL)>>1LL;
  }

  printf("%lld\n", pos);
  return 0;
}

Compilation message

rack.cpp: In function 'int main()':
rack.cpp:10:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |   scanf("%d%lld", &n, &k);
      |   ~~~~~^~~~~~~~~~~~~~~~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 8120 KB Output is correct
2 Correct 9 ms 8116 KB Output is correct
3 Correct 9 ms 8012 KB Output is correct
4 Correct 9 ms 8012 KB Output is correct
5 Correct 10 ms 8072 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 8120 KB Output is correct
2 Correct 9 ms 8116 KB Output is correct
3 Correct 9 ms 8012 KB Output is correct
4 Correct 9 ms 8012 KB Output is correct
5 Correct 10 ms 8072 KB Output is correct
6 Correct 9 ms 8012 KB Output is correct
7 Correct 9 ms 8040 KB Output is correct
8 Correct 9 ms 8112 KB Output is correct
9 Correct 9 ms 8012 KB Output is correct
10 Correct 9 ms 8012 KB Output is correct

Subtask #3
60.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 8120 KB Output is correct
2 Correct 9 ms 8116 KB Output is correct
3 Correct 9 ms 8012 KB Output is correct
4 Correct 9 ms 8012 KB Output is correct
5 Correct 10 ms 8072 KB Output is correct
6 Correct 9 ms 8012 KB Output is correct
7 Correct 9 ms 8040 KB Output is correct
8 Correct 9 ms 8112 KB Output is correct
9 Correct 9 ms 8012 KB Output is correct
10 Correct 9 ms 8012 KB Output is correct
11 Correct 9 ms 8088 KB Output is correct
12 Correct 10 ms 8012 KB Output is correct
13 Correct 9 ms 8012 KB Output is correct
14 Correct 9 ms 8108 KB Output is correct
15 Correct 10 ms 8012 KB Output is correct