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Submission #634255

# Submission time Handle Problem Language Result Execution time Memory
634255 2022-08-24T08:00:06 Z antimirage Rack (eJOI19_rack) C++14
40 / 100
 10 ms 8112 KB 
#include <iostream>
#include <algorithm>
#include <vector>
#include <math.h>
#include <set>
#include <map>

using namespace std;

const int N = 1e6 + 5;

long long n, k, ans, mod = 1e9 + 7, two[N];

main(){
    cin >> n >> k;
    
    two[0] = 1;
    for (int i = 1; i < N; i++) {
        two[i] = two[i - 1] * 2 % mod;
    }
    
    long long pw = n;
    for (long long j = 0; j <= n; j++) {
        if (k <= (1 << j)) {
            if (j > 0) 
                ans = (ans + two[pw]) % mod;
            else
                ans++;
            k -= (1 << (j - 1));
            pw = n;
            j = -1;
        } else {
            pw--;
        }
        if (k == 0) break;
    }
    cout << ans << endl;
}

Compilation message

rack.cpp:14:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   14 | main(){
      | ^~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 8020 KB Output is correct
2 Correct 8 ms 8020 KB Output is correct
3 Correct 8 ms 8060 KB Output is correct
4 Correct 10 ms 8020 KB Output is correct
5 Correct 8 ms 8088 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 8020 KB Output is correct
2 Correct 8 ms 8020 KB Output is correct
3 Correct 8 ms 8060 KB Output is correct
4 Correct 10 ms 8020 KB Output is correct
5 Correct 8 ms 8088 KB Output is correct
6 Correct 10 ms 8072 KB Output is correct
7 Correct 8 ms 8084 KB Output is correct
8 Correct 8 ms 8020 KB Output is correct
9 Correct 9 ms 8020 KB Output is correct
10 Correct 8 ms 8020 KB Output is correct

Subtask #3
0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 8020 KB Output is correct
2 Correct 8 ms 8020 KB Output is correct
3 Correct 8 ms 8060 KB Output is correct
4 Correct 10 ms 8020 KB Output is correct
5 Correct 8 ms 8088 KB Output is correct
6 Correct 10 ms 8072 KB Output is correct
7 Correct 8 ms 8084 KB Output is correct
8 Correct 8 ms 8020 KB Output is correct
9 Correct 9 ms 8020 KB Output is correct
10 Correct 8 ms 8020 KB Output is correct
11 Correct 8 ms 8112 KB Output is correct
12 Incorrect 9 ms 8112 KB Output isn't correct
13 Halted 0 ms 0 KB -