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AmountApproximation.cpp
65 lines (55 loc) · 2.57 KB
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AmountApproximation.cpp
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#include <cstdio>
#include <algorithm>
#include <vector>
#include <sstream>
#include <iostream>
#include <string>
#include <map>
#include <queue>
#include <cstring>
using namespace std;
class AmountApproximation {
public:
int approximate(int D, int p1, int p2) {
map<int, bool> sums;
if (D % p1 == 0 || D % p2 == 0) return D;
if (p1 < p2) {
int tmp = p1;
p1 = p2;
p2 = tmp;
}
int t1 = (D / p1) + 1;
int s1 = t1 * p1;
int t2 = 0;
int s2 = 0;
int ret = 2000000100;
while (s1 >= 0) {
if (sums.find(s1+s2) != sums.end()) break;
sums[s1+s2] = true;
ret = min(ret, s1+s2);
s1 -= p1;
while (s1+s2 < D) {
s2 += p2;
}
}
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(); }
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 int &Expected, const int &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 = 17; int Arg1 = 7; int Arg2 = 9; int Arg3 = 18; verify_case(0, Arg3, approximate(Arg0, Arg1, Arg2)); }
void test_case_1() { int Arg0 = 17; int Arg1 = 7; int Arg2 = 13; int Arg3 = 20; verify_case(1, Arg3, approximate(Arg0, Arg1, Arg2)); }
void test_case_2() { int Arg0 = 21; int Arg1 = 7; int Arg2 = 13; int Arg3 = 21; verify_case(2, Arg3, approximate(Arg0, Arg1, Arg2)); }
void test_case_3() { int Arg0 = 37; int Arg1 = 9; int Arg2 = 17; int Arg3 = 43; verify_case(3, Arg3, approximate(Arg0, Arg1, Arg2)); }
void test_case_4() { int Arg0 = 287341; int Arg1 = 2345; int Arg2 = 7253; int Arg3 = 287398; verify_case(4, Arg3, approximate(Arg0, Arg1, Arg2)); }
// END CUT HERE
};
// BEGIN CUT HERE
int main() {
AmountApproximation ___test;
___test.run_test(-1);
}
// END CUT HERE