Submission #2208607

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Source Code Expand

// ------------------------------------
// Date:2018/ 3/15
// Problem:AGC 014 CookieExchanges a.cpp
//
// ------------------------------------

#include <bits/stdc++.h>

using namespace std;

#define EACH(i,a) for (auto&& i : a)
#define FOR(i,a,b) for(int i=(int)a;i<(int)b;++i)
#define RFOR(i,a,b) for(int i=(int)b-1;i>=(int)a;--i)
#define REP(i,n) FOR(i,0,n)
#define RREP(i,n) RFOR(i,0,n)
#define ALL(a) (a).begin(),(a).end()
#define debug(x) cerr << #x << ":" << x << endl

typedef long long ll;

static const int MOD = 1000000007;

int main()
{
  cin.tie(0);
  ios::sync_with_stdio(false);

  int a, b, c;
  cin >> a >> b >> c;
  int tmp = 2;
  int ans = 0;
  int tmpA, tmpB, tmpC;
  if (a == b and b == c) {
    cout << -1 << endl;
    return 0;
  } else {
    if (not(a % 2 == 0 and b % 2 == 0 and c % 2 == 0)) {
      cout << ans << endl;
      return 0;
    }
    while(true) {
      tmpA = b + c;
      tmpB = a + c;
      tmpC = a + b;
      if (not(tmpA % tmp == 0 and tmpB % tmp == 0 and tmpC % tmp == 0)) break;
      a = tmpA / tmp;
      b = tmpB / tmp;
      c = tmpC / tmp;
      tmp <<= 1;
      ans++;
    }
  }
  cout << ans + 1 << endl;
  
  return 0;
}

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