topcoder/ChangingString.cpp at master · cou929/topcoder · GitHub

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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>

using namespace std;

class ChangingString {
public:
  int distance(string A, string B, int K)
  {
    vector <int> gap;
    int ret = 0;

    for (int i=0; i<A.size(); i++)
      gap.push_back(abs(A[i] - B[i]));

    sort(gap.rbegin(), gap.rend());

    for (int i=0; i<K; i++)
      if (gap[i] == 0)
	gap[i] = 1;
      else
	gap[i] = 0;

    for (int i=0; i<gap.size(); i++)
      ret += gap[i];

    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() { string Arg0 = "ab"; string Arg1 = "ba"; int Arg2 = 2; int Arg3 = 0; verify_case(0, Arg3, distance(Arg0, Arg1, Arg2)); }
  void test_case_1() { string Arg0 = "aa"; string Arg1 = "aa"; int Arg2 = 2; int Arg3 = 2; verify_case(1, Arg3, distance(Arg0, Arg1, Arg2)); }
  void test_case_2() { string Arg0 = "aaa"; string Arg1 = "baz"; int Arg2 = 1; int Arg3 = 1; verify_case(2, Arg3, distance(Arg0, Arg1, Arg2)); }
  void test_case_3() { string Arg0 = "fdfdfdfdfdsfabasd"; string Arg1 = "jhlakfjdklsakdjfk"; int Arg2 = 8; int Arg3 = 24; verify_case(3, Arg3, distance(Arg0, Arg1, Arg2)); }
  void test_case_4() { string Arg0 = "aa"; string Arg1 = "bb"; int Arg2 = 2; int Arg3 = 0; verify_case(4, Arg3, distance(Arg0, Arg1, Arg2)); }

  // END CUT HERE

};

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