oj.uz

Submission #1100867

# Submission time Handle Problem Language Result Execution time Memory
1100867 2024-10-14T20:41:37 Z vincentbucourt1 Rack (eJOI19_rack) C++14
40 / 100
 1 ms 336 KB 
#include <bits/stdc++.h>
using namespace std;
#define int long long

const int MOD = 1e9 + 7;

int N, numIter;

int ans = 0;

long long modular(long long base, long long exp, int mod) {
   long long res = 1;
   while (exp > 0) {
      if (exp % 2 == 1)
         res= (res * base) % mod;
      exp = exp >> 1;
      base = (base * base) % mod;
   }
   return res;
}

signed main() {
    cin >> N >> numIter;

    numIter--;
    for (int i = 0; i <= 20; i++) {
        bool filled = (numIter & (1 << i));
        ans += (modular(2, N - i - 1, MOD)) * filled;
        ans %= MOD;
    }

    cout << (ans + 1) % MOD << "\n";
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 0 ms 336 KB Output is correct
3 Correct 0 ms 336 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 0 ms 336 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 0 ms 336 KB Output is correct
3 Correct 0 ms 336 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 0 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 336 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 1 ms 336 KB Output is correct

Subtask #3
0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 0 ms 336 KB Output is correct
3 Correct 0 ms 336 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 0 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 336 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 1 ms 336 KB Output is correct
11 Incorrect 1 ms 336 KB Output isn't correct
12 Halted 0 ms 0 KB -