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TheSwapsDivTwo.java
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// Paste me into the FileEdit configuration dialog
// Single Round Match 575 - Round 1 250.0
public class TheSwapsDivTwo {
public int find(int[] sequence) {
int count = 0;
boolean distinct = false;
for (int i = 0; i < sequence.length - 1; i++) {
for (int j = i + 1; j < sequence.length; j++) {
if (sequence[i] != sequence[j]) {
count++;
} else {
distinct = true;
}
}
}
return count + (distinct ? 1 : 0);
}
// BEGIN CUT HERE
public static void main(String[] args) {
if (args.length == 0) {
TheSwapsDivTwoHarness.run_test(-1);
} else {
for (int i = 0; i < args.length; ++i)
TheSwapsDivTwoHarness.run_test(Integer.valueOf(args[i]));
}
}
// END CUT HERE
}
// BEGIN CUT HERE
class TheSwapsDivTwoHarness {
public static void run_test(int casenum) {
if (casenum != -1) {
if (runTestCase(casenum) == -1)
System.err.println("Illegal input! Test case " + casenum + " does not exist.");
return;
}
int correct = 0, total = 0;
for (int i = 0;; ++i) {
int x = runTestCase(i);
if (x == -1) {
if (i >= 100)
break;
continue;
}
correct += x;
++total;
}
if (total == 0) {
System.err.println("No test cases run.");
} else if (correct < total) {
System.err.println("Some cases FAILED (passed " + correct + " of " + total + ").");
} else {
System.err.println("All " + total + " tests passed!");
}
}
static boolean compareOutput(int expected, int result) {
return expected == result;
}
static String formatResult(int res) {
return String.format("%d", res);
}
static int verifyCase(int casenum, int expected, int received) {
System.err.print("Example " + casenum + "... ");
if (compareOutput(expected, received)) {
System.err.println("PASSED");
return 1;
} else {
System.err.println("FAILED");
System.err.println(" Expected: " + formatResult(expected));
System.err.println(" Received: " + formatResult(received));
return 0;
}
}
static int runTestCase(int casenum__) {
switch (casenum__) {
case 0: {
int[] sequence = { 4, 7, 4 };
int expected__ = 3;
return verifyCase(casenum__, expected__, new TheSwapsDivTwo().find(sequence));
}
case 1: {
int[] sequence = { 1, 47 };
int expected__ = 1;
return verifyCase(casenum__, expected__, new TheSwapsDivTwo().find(sequence));
}
case 2: {
int[] sequence = { 9, 9, 9, 9 };
int expected__ = 1;
return verifyCase(casenum__, expected__, new TheSwapsDivTwo().find(sequence));
}
case 3: {
int[] sequence = { 22, 16, 36, 35, 14, 9, 33, 6, 28, 12, 18, 14, 47, 46, 29, 22, 14, 17, 4, 15, 28, 6, 39,
24, 47, 37 };
int expected__ = 319;
return verifyCase(casenum__, expected__, new TheSwapsDivTwo().find(sequence));
}
// custom cases
case 4: {
int[] sequence = {5,5,7,7,};
int expected__ = 5;
return verifyCase(casenum__, expected__, new
TheSwapsDivTwo().find(sequence));
}
/*
* case 5: {
* int[] sequence = ;
* int expected__ = ;
*
* return verifyCase(casenum__, expected__, new
* TheSwapsDivTwo().find(sequence));
* }
*/
/*
* case 6: {
* int[] sequence = ;
* int expected__ = ;
*
* return verifyCase(casenum__, expected__, new
* TheSwapsDivTwo().find(sequence));
* }
*/
default:
return -1;
}
}
}
// END CUT HERE