Artifact 9a8c214df95651f474733d47d7267fde5c40c5a0
#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 <tuple>
using namespace std;
typedef long long LL;
typedef complex<double> CMP;
static const int MODVAL = 1000000007;
class BagAndCards { public:
int getHash(int n, int m, int x, int a, int b, int c, string isGood)
{
vector<vector<int>> count(n, vector<int>(m, 0));
for(int i=0; i<n; ++i)
for(int j=0; j<m; ++j) {
count[i][j] = x;
x = int(((LL(x) * a + b) ^ c) % MODVAL);
}
int total_ans = 0;
for(int i=0; i<n; ++i)
{
vector<LL> mult(m);
for(int c1=0; c1<m; ++c1)
for(int c2=0; c2<m; ++c2)
if(isGood[c1+c2]=='Y')
mult[c2] += count[i][c1];
for(int c=0; c<m; ++c)
mult[c] %= MODVAL;
for(int k=i+1; k<n; ++k)
{
LL ans = 0;
for(int c=0; c<m; ++c)
ans += count[k][c] * mult[c] % MODVAL;
total_ans ^= int(ans % MODVAL);
}
}
return total_ans;
}
};
// 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(_, BagAndCards().getHash(n, m, x, a, b, c, isGood));}
int main(){
CASE(0)
int n = 2;
int m = 4;
int x = 1;
int a = 1;
int b = 0;
int c = 0;
string isGood = "NNYYNYN";
int _ = 9;
END
CASE(1)
int n = 3;
int m = 5;
int x = 1;
int a = 1;
int b = 1;
int c = 2;
string isGood = "NNYYNYNYN";
int _ = 1532;
END
CASE(2)
int n = 10;
int m = 20;
int x = 111;
int a = 222;
int b = 333;
int c = 444;
string isGood = "NNNNNYYYNNNYYYYYYNNYYYYNNNNYNNYYYNNNYYN" ;
int _ = 450750683;
END
CASE(3)
int n = 2;
int m = 2;
int x = 1;
int a = 1;
int b = 0;
int c = 0;
string isGood = "NNY";
int _ = 1;
END
/*
CASE(4)
int n = ;
int m = ;
int x = ;
int a = ;
int b = ;
int c = ;
string isGood = ;
int _ = ;
END
CASE(5)
int n = ;
int m = ;
int x = ;
int a = ;
int b = ;
int c = ;
string isGood = ;
int _ = ;
END
*/
}
// END CUT HERE