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Subway2.cpp
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Subway2.cpp
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// BEGIN CUT HERE
// END CUT HERE
#include <sstream>
#include <string>
#include <vector>
#include <map>
#include <algorithm>
#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <utility>
#include <set>
#include <cctype>
#include <queue>
#include <stack>
using namespace std;
class Subway2 {
public:
double minTime(int length, int maxAcceleration, int maxVelocity)
{
double ret = 0;
double l = maxVelocity*maxVelocity / (double)(2 * maxAcceleration);
if (l < (0.5 * length))
{
ret = maxVelocity / (double)maxAcceleration;
ret += ((0.5 * length) - l) / maxVelocity;
ret *= 2;
}
else
{
ret = sqrt(length / (double)maxAcceleration) * 2;
}
return ret;
}
// 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(); if ((Case == -1) || (Case == 4)) test_case_4(); if ((Case == -1) || (Case == 5)) test_case_5(); }
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 = 1; int Arg1 = 2; int Arg2 = 10; double Arg3 = 1.4142135623730951; verify_case(0, Arg3, minTime(Arg0, Arg1, Arg2)); }
void test_case_1() { int Arg0 = 1; int Arg1 = 1; int Arg2 = 1; double Arg3 = 2.0; verify_case(1, Arg3, minTime(Arg0, Arg1, Arg2)); }
void test_case_2() { int Arg0 = 10; int Arg1 = 1; int Arg2 = 1; double Arg3 = 11.0; verify_case(2, Arg3, minTime(Arg0, Arg1, Arg2)); }
void test_case_3() { int Arg0 = 1; int Arg1 = 10; int Arg2 = 1; double Arg3 = 1.1; verify_case(3, Arg3, minTime(Arg0, Arg1, Arg2)); }
void test_case_4() { int Arg0 = 778; int Arg1 = 887; int Arg2 = 384; double Arg3 = 2.458961621570838; verify_case(4, Arg3, minTime(Arg0, Arg1, Arg2)); }
void test_case_5() { int Arg0 = 336; int Arg1 = 794; int Arg2 = 916; double Arg3 = 1.301036207838119; verify_case(5, Arg3, minTime(Arg0, Arg1, Arg2)); }
// END CUT HERE
};
// BEGIN CUT HERE
int main() {
Subway2 ___test;
___test.run_test(-1);
}
// END CUT HERE