Я отправил свой код на вопрос по USACO под названием «Часы».
Это ссылка на вопрос: http://ace.delos.com/usacoprob2?a=wj7UqN4l7zk&S=clocks
Это вывод:
Compiling...
Compile: OK
Executing...
Test 1: TEST OK [0.173 secs, 13928 KB]
Test 2: TEST OK [0.130 secs, 13928 KB]
Test 3: TEST OK [0.583 secs, 13928 KB]
Test 4: TEST OK [0.965 secs, 13928 KB]
> Run 5: Execution error: Your program (`clocks') used more than the
allotted runtime of 1 seconds (it ended or was stopped at 1.584
seconds) when presented with test case 5. It used 13928 KB of
memory.
------ Data for Run 5 ------
6 12 12
12 12 12
12 12 12
----------------------------
Your program printed data to stdout. Here is the data:
-------------------
time:_0.40928452
-------------------
Test 5: RUNTIME 1.584>1 (13928 KB)
Я написал свою программу так, чтобы она выводила время, затраченное (в секундах) на завершение программы до ее выхода.
Как видно, для выхода потребовалось 0,40928452 секунды. Так как, черт возьми, время выполнения закончилось до 1,584 секунды? Что мне с этим делать?
Это код, если он помогает:
import java.io.*;<br>
import java.util.*;
class clocks {
public static void main(String[] args) throws IOException {
long start = System.nanoTime();
// Use BufferedReader rather than RandomAccessFile; it's much faster
BufferedReader f = new BufferedReader(new FileReader("clocks.in"));
// input file name goes above
PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter("clocks.out")));
// Use StringTokenizer vs. readLine/split -- lots faster
int[] clock = new int[9];
for (int i = 0; i < 3; i++) {
StringTokenizer st = new StringTokenizer(f.readLine());
// Get line, break into tokens
clock[i * 3] = Integer.parseInt(st.nextToken());
clock[i * 3 + 1] = Integer.parseInt(st.nextToken());
clock[i * 3 + 2] = Integer.parseInt(st.nextToken());
}
ArrayList validCombination = new ArrayList();;
for (int i = 1; true; i++) {
ArrayList combination = getPossibleCombinations(i);
for (int j = 0; j < combination.size(); j++) {
if (tryCombination(clock, (int[]) combination.get(j))) {
validCombination.add(combination.get(j));
}
}
if (validCombination.size() > 0) {
break;
}
}
int [] min = (int[])validCombination.get(0);
if (validCombination.size() > 1){
String minS = "";
for (int i=0; i<min.length; i++)
minS += min[i];
for (int i=1; i<validCombination.size(); i++){
String tempS = "";
int [] temp = (int[])validCombination.get(i);
for (int j=0; j<temp.length; j++)
tempS += temp[j];
if (tempS.compareTo(minS) < 0){
minS = tempS;
min = temp;
}
}
}
for (int i=0; i<min.length-1; i++)
out.print(min[i] + " ");
out.println(min[min.length-1]);
out.close(); // close the output file
long end = System.nanoTime();
System.out.println("time: " + (end-start)/1000000000.0);
System.exit(0); // don't omit this!
}
static boolean tryCombination(int[] clock, int[] steps) {
int[] temp = Arrays.copyOf(clock, clock.length);
for (int i = 0; i < steps.length; i++)
transform(temp, steps[i]);
for (int i=0; i<temp.length; i++)
if (temp[i] != 12)
return false;
return true;
}
static void transform(int[] clock, int n) {
if (n == 1) {
int[] clocksToChange = {0, 1, 3, 4};
add3(clock, clocksToChange);
} else if (n == 2) {
int[] clocksToChange = {0, 1, 2};
add3(clock, clocksToChange);
} else if (n == 3) {
int[] clocksToChange = {1, 2, 4, 5};
add3(clock, clocksToChange);
} else if (n == 4) {
int[] clocksToChange = {0, 3, 6};
add3(clock, clocksToChange);
} else if (n == 5) {
int[] clocksToChange = {1, 3, 4, 5, 7};
add3(clock, clocksToChange);
} else if (n == 6) {
int[] clocksToChange = {2, 5, 8};
add3(clock, clocksToChange);
} else if (n == 7) {
int[] clocksToChange = {3, 4, 6, 7};
add3(clock, clocksToChange);
} else if (n == 8) {
int[] clocksToChange = {6, 7, 8};
add3(clock, clocksToChange);
} else if (n == 9) {
int[] clocksToChange = {4, 5, 7, 8};
add3(clock, clocksToChange);
}
}
static void add3(int[] clock, int[] position) {
for (int i = 0; i < position.length; i++) {
if (clock[position[i]] != 12) {
clock[position[i]] += 3;
} else {
clock[position[i]] = 3;
}
}
}
static ArrayList getPossibleCombinations(int size) {
ArrayList l = new ArrayList();
int[] current = new int[size];
for (int i = 0; i < current.length; i++) {
current[i] = 1;
}
int[] end = new int[size];
for (int i = 0; i < end.length; i++) {
end[i] = 9;
}
l.add(Arrays.copyOf(current, size));
while (!Arrays.equals(current, end)) {
incrementWithoutRepetition(current, current.length - 1);
l.add(Arrays.copyOf(current, size));
}
int [][] combination = new int[l.size()][size];
for (int i=0; i<l.size(); i++)
combination[i] = (int[])l.get(i);
return l;
}
static int incrementWithoutRepetition(int[] n, int index) {
if (n[index] != 9) {
n[index]++;
return n[index];
} else {
n[index] = incrementWithoutRepetition(n, index - 1);
return n[index];
}
}
static void p(int[] n) {
for (int i = 0; i < n.length; i++) {
System.out.print(n[i] + " ");
}
System.out.println("");
}
}