FixedDiceGameDiv2.cpp

#include <iostream>
#include <sstream>
#include <vector>
#include <algorithm>
#include <set>
#include <map>
#include <cstring>
using namespace std;

class FixedDiceGameDiv2 {
        public:
        double getExpectation(int a, int b)
        {
            int s = 0, c = 0;
            for(int aa = 2; aa <= a; aa++){
                int bb = min(b, aa-1);
                s += aa*bb;
                c += bb;
            }
            return (double)s/(double)c;

        }

// BEGIN CUT HERE
	public:
	void run_test(int Case) { if ((Case == -1) || (Case == 0)) test_case_0(); if ((Case == -1) || (Case == 1)) test_case_1(); if ((Case == -1) || (Case == 2)) test_case_2(); if ((Case == -1) || (Case == 3)) test_case_3(); }
	private:
	template <typename T> string print_array(const vector<T> &V) { ostringstream os; os << "{ "; for (typename vector<T>::const_iterator iter = V.begin(); iter != V.end(); ++iter) os << '\"' << *iter << "\","; os << " }"; return os.str(); }
	void verify_case(int Case, const double &Expected, const double &Received) { cerr << "Test Case #" << Case << "..."; if (Expected == Received) cerr << "PASSED" << endl; else { cerr << "FAILED" << endl; cerr << "\tExpected: \"" << Expected << '\"' << endl; cerr << "\tReceived: \"" << Received << '\"' << endl; } }
	void test_case_0() { int Arg0 = 2; int Arg1 = 2; double Arg2 = 2.0; verify_case(0, Arg2, getExpectation(Arg0, Arg1)); }
	void test_case_1() { int Arg0 = 4; int Arg1 = 2; double Arg2 = 3.2; verify_case(1, Arg2, getExpectation(Arg0, Arg1)); }
	void test_case_2() { int Arg0 = 3; int Arg1 = 3; double Arg2 = 2.6666666666666665; verify_case(2, Arg2, getExpectation(Arg0, Arg1)); }
	void test_case_3() { int Arg0 = 11; int Arg1 = 13; double Arg2 = 7.999999999999999; verify_case(3, Arg2, getExpectation(Arg0, Arg1)); }

// END CUT HERE

};

// BEGIN CUT HERE
     int main()
     {
        FixedDiceGameDiv2 ___test;
        ___test.run_test(-1);
     }
// END CUT HERE