Artifact a746083be2e0008bdf83d211261ceb060e76c231
#include <iostream>
#include <sstream>
#include <iomanip>
#include <vector>
#include <string>
#include <map>
#include <set>
#include <algorithm>
#include <numeric>
#include <iterator>
#include <functional>
#include <complex>
#include <queue>
#include <stack>
#include <cmath>
#include <cassert>
#include <cstring>
using namespace std;
typedef long long LL;
typedef complex<double> CMP;
class CoinsExchange { public:
int countExchanges(int G1, int S1, int B1, int G2, int S2, int B2)
{
if( G1 < G2 ) {
int n = G2-G1;
return check2( S1, B1, S2+n*11, B2, n ); // 11*n silver needed
}
if( B1 < B2 ) {
int n = (B2-B1+8)/9;
return check2( G1, S1, G2, S2+n, n ); // n silver needed
}
// need silver
int n = 0;
while( S1<S2 && G1- 1>=G2 ) S1+=9, G1-= 1, n++;
while( S1<S2 && B1-11>=B2 ) S1+=1, B1-=11, n++;
return S1<S2 ? -1 : n;
}
int check2(int S1, int B1, int S2, int B2, int acc)
{
if( S1 < S2 ) {
int n = S2-S1;
return B2<=B1-n*11 ? n+acc : -1;
}
if( B1 < B2 ) {
int n = (B2-B1+8)/9;
return S2<=S1-n ? n+acc : -1;
}
return acc;
}
};
// BEGIN CUT HERE
#include <ctime>
double start_time; string timer()
{ ostringstream os; os << " (" << int((clock()-start_time)/CLOCKS_PER_SEC*1000) << " msec)"; return os.str(); }
template<typename T> ostream& operator<<(ostream& os, const vector<T>& v)
{ os << "{ ";
for(typename vector<T>::const_iterator it=v.begin(); it!=v.end(); ++it)
os << '\"' << *it << '\"' << (it+1==v.end() ? "" : ", "); os << " }"; return os; }
void verify_case(const int& Expected, const int& Received) {
bool ok = (Expected == Received);
if(ok) cerr << "PASSED" << timer() << endl; else { cerr << "FAILED" << timer() << endl;
cerr << "\to: \"" << Expected << '\"' << endl << "\tx: \"" << Received << '\"' << endl; } }
#define CASE(N) {cerr << "Test Case #" << N << "..." << flush; start_time=clock();
#define END verify_case(_, CoinsExchange().countExchanges(G1, S1, B1, G2, S2, B2));}
int main(){
CASE(0)
int G1 = 1;
int S1 = 0;
int B1 = 0;
int G2 = 0;
int S2 = 0;
int B2 = 81;
int _ = 10;
END
CASE(1)
int G1 = 1;
int S1 = 100;
int B1 = 12;
int G2 = 5;
int S2 = 53;
int B2 = 33;
int _ = 7;
END
CASE(2)
int G1 = 1;
int S1 = 100;
int B1 = 12;
int G2 = 5;
int S2 = 63;
int B2 = 33;
int _ = -1;
END
CASE(3)
int G1 = 5;
int S1 = 10;
int B1 = 12;
int G2 = 3;
int S2 = 7;
int B2 = 9;
int _ = 0;
END
}
// END CUT HERE