oj.uz

Submission #237578

# Submission time Handle Problem Language Result Execution time Memory
237578 2020-06-07T13:22:36 Z Half Rack (eJOI19_rack) C++14
40 / 100
 5 ms 384 KB 
#include <iostream>
#include <vector>
#include <set>
#include <map>
#include <algorithm>
#include <cmath>

using namespace std;

typedef vector<int> vi;
typedef pair<int,int> pi;
typedef long long ll;

#define loop(i,a,b) for (int i = a; i <= b; i++)

#define INF ((unsigned) ~0)
#define F first
#define S second
#define PB push_back
#define MP make_pair

const ll MOD = 1000000000 + 7;

int main(){
    int n;
    ll k;
    cin >> n >> k;
    k--;
    ll res = 1;
    ll e;
    ll p;
    for(e = n - 1, p = 1; e >= 0; e--, p = (p * 2) % MOD)
        if(1<<e)
            if(k & (1<<e))
                res = (res + p) % MOD;
    cout << res << "\n";
}

Compilation message

rack.cpp: In function 'int main()':
rack.cpp:33:13: warning: '<<' in boolean context, did you mean '<' ? [-Wint-in-bool-context]
         if(1<<e)
            ~^~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 256 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 256 KB Output is correct
4 Correct 4 ms 256 KB Output is correct
5 Correct 4 ms 256 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 256 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 256 KB Output is correct
4 Correct 4 ms 256 KB Output is correct
5 Correct 4 ms 256 KB Output is correct
6 Correct 4 ms 256 KB Output is correct
7 Correct 4 ms 256 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 4 ms 256 KB Output is correct
10 Correct 5 ms 256 KB Output is correct

Subtask #3
0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 256 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 256 KB Output is correct
4 Correct 4 ms 256 KB Output is correct
5 Correct 4 ms 256 KB Output is correct
6 Correct 4 ms 256 KB Output is correct
7 Correct 4 ms 256 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 4 ms 256 KB Output is correct
10 Correct 5 ms 256 KB Output is correct
11 Incorrect 5 ms 384 KB Output isn't correct
12 Halted 0 ms 0 KB -