Submission #72175018

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Source Code Expand

#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
#include <atcoder/all>
#define DEBUG_PRINT(x) std::cerr << #x << ": " << (x) << std::endl
#define SQUARED(x) ((x) * (x))
#define CUBED(x) ((x) * (x) * (x))
#define CEIL(x, y) ((x + y - 1) / y)
#define FLOOR(x, y) (x / y)
#define CTOI(c) ((c) - '0')
#define CHECK_HW(h, w) (0 <= h and h < H and 0 <= w and w < W)

using namespace std;
using namespace atcoder;

const long long INF = 1e15;
const long double EPS = 1e-8;

long long int_pow(long long a, long long n)
{
  long long res = 1;
  while (n > 0) {
    if (n & 1) res = res * a;
    a = a * a;
    n >>= 1;
  }
  return res;
}

int main()
{
  long long N;
  std::scanf("%lld", &N);

  cout << int_pow(2, N) - 2 * N << endl;

  return 0;
}

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