topcoder/src/GuessingNextElement.java at master · yuki2006/topcoder · GitHub

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// Paste me into the FileEdit configuration dialog
// SRM 387 DIV2
publicclassGuessingNextElement {
publicintguess(int[] A) {
intsub = A[A.length - 1] - A[A.length - 2];
if (sub == A[A.length - 2] - A[A.length - 3]) {
returnA[A.length - 1] + sub;
 }
returnA[A.length - 1] * (A[A.length - 1] / A[A.length - 2]);
	}

// BEGIN CUT HERE
publicstaticvoidmain(String[] args) {
if (args.length == 0) {
GuessingNextElementHarness.run_test(-1);
 } else {
for (inti = 0; i < args.length; ++i)
GuessingNextElementHarness.run_test(Integer.valueOf(args[i]));
 }
	}
// END CUT HERE
}

// BEGIN CUT HERE
classGuessingNextElementHarness {
publicstaticvoidrun_test(intcasenum) {
if (casenum != -1) {
if (runTestCase(casenum) == -1)
System.err.println("Illegal input! Test case " + casenum + " does not exist.");
return;
 }

intcorrect = 0, total = 0;
for (inti = 0;; ++i) {
intx = runTestCase(i);
if (x == -1) {
if (i >= 100)
break;
continue;
 }
correct += x;
 ++total;
 }

if (total == 0) {
System.err.println("No test cases run.");
 } elseif (correct < total) {
System.err.println("Some cases FAILED (passed " + correct + " of " + total + ").");
 } else {
System.err.println("All " + total + " tests passed!");
 }
	}

staticbooleancompareOutput(intexpected, intresult) {
returnexpected == result;
	}

staticStringformatResult(intres) {
returnString.format("%d", res);
	}

staticintverifyCase(intcasenum, intexpected, intreceived) {
System.err.print("Example " + casenum + "... ");
if (compareOutput(expected, received)) {
System.err.println("PASSED");
return1;
 } else {
System.err.println("FAILED");
System.err.println(" Expected: " + formatResult(expected));
System.err.println(" Received: " + formatResult(received));
return0;
 }
	}

staticintrunTestCase(intcasenum__) {
switch (casenum__) {
case0: {
int[] A = { 364, 843, 1322, 1801 };
intexpected__ = 2280;

returnverifyCase(casenum__, expected__, newGuessingNextElement().guess(A));
 }
case1: {
int[] A = { 394, 1172, 1950, 2728, 3506, 4284, 5062, 5840 };
intexpected__ = 6618;

returnverifyCase(casenum__, expected__, newGuessingNextElement().guess(A));
 }
case2: {
int[] A = { 13, 117, 1053, 9477, 85293 };
intexpected__ = 767637;

returnverifyCase(casenum__, expected__, newGuessingNextElement().guess(A));
 }
case3: {
int[] A = { 22, 220, 2200, 22000 };
intexpected__ = 220000;

returnverifyCase(casenum__, expected__, newGuessingNextElement().guess(A));
 }
case4: {
int[] A = { 250000, 500000, 1000000 };
intexpected__ = 2000000;

returnverifyCase(casenum__, expected__, newGuessingNextElement().guess(A));
 }

// custom cases

/*
 * case 5: {
 * int[] A = ;
 * int expected__ = ;
 *
 * return verifyCase(casenum__, expected__, new
 * GuessingNextElement().guess(A));
 * }
 */
/*
 * case 6: {
 * int[] A = ;
 * int expected__ = ;
 *
 * return verifyCase(casenum__, expected__, new
 * GuessingNextElement().guess(A));
 * }
 */
/*
 * case 7: {
 * int[] A = ;
 * int expected__ = ;
 *
 * return verifyCase(casenum__, expected__, new
 * GuessingNextElement().guess(A));
 * }
 */
default:
return -1;
 }
	}
}

// END CUT HERE