Artifact e8ca5f00584e6a135f5d0faa23ca9dd50d890e31
#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 PerfectPermutation { public:
int reorder(vector <int> P)
{
vector<bool> used(P.size(), false);
int num_loop = 0;
for(int i=0; i<P.size(); ++i)
if( !used[i] ) {
++num_loop;
for(int p=i; !used[p]; p=P[p])
used[p] = true;
}
return num_loop==1 ? 0 : num_loop;
}
};
// 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(_, PerfectPermutation().reorder(P));}
int main(){
CASE(0)
int P_[] = {2, 0, 1};
vector <int> P(P_, P_+sizeof(P_)/sizeof(*P_));
int _ = 0;
END
CASE(1)
int P_[] = {2, 0, 1, 4, 3};
vector <int> P(P_, P_+sizeof(P_)/sizeof(*P_));
int _ = 2;
END
CASE(2)
int P_[] = {2, 3, 0, 1};
vector <int> P(P_, P_+sizeof(P_)/sizeof(*P_));
int _ = 2;
END
CASE(3)
int P_[] = {0, 5, 3, 2, 1, 4};
vector <int> P(P_, P_+sizeof(P_)/sizeof(*P_));
int _ = 3;
END
CASE(4)
int P_[] = {4, 2, 6, 0, 3, 5, 9, 7, 8, 1};
vector <int> P(P_, P_+sizeof(P_)/sizeof(*P_));
int _ = 5;
END
}
// END CUT HERE