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BOJ_11508.java
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BOJ_11508.java
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import java.io.DataInputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
public class Main extends FastInput {
private void solution() throws Exception {
int n = nextInt();
ArrayList<Integer> arr = new ArrayList<>(n);
while (n-->0) arr.add(nextInt());
Collections.sort(arr, Collections.reverseOrder());
int sum = 0;
for(int i = 0; i < arr.size(); i++) {
if ((i+1)%3!=0)
sum+=arr.get(i);
}
System.out.println(sum);
}
public static void main(String[] args) throws Exception {
initFI();
new Main().solution();
}
}
class FastInput {
private static final int DEFAULT_BUFFER_SIZE = 1 << 16;
private static DataInputStream inputStream;
private static byte[] buffer;
private static int curIdx, maxIdx;
protected static void initFI() {
inputStream = new DataInputStream(System.in);
buffer = new byte[DEFAULT_BUFFER_SIZE];
curIdx = maxIdx = 0;
}
protected static int nextInt() throws IOException {
int ret = 0;
byte c = read();
while (c <= ' ') c = read();
do {
ret = ret * 10 + c - '0';
} while ((c = read()) >= '0' && c <= '9');
return ret;
}
private static byte read() throws IOException {
if (curIdx == maxIdx) {
maxIdx = inputStream.read(buffer, curIdx = 0, DEFAULT_BUFFER_SIZE);
if (maxIdx == -1) buffer[0] = -1;
}
return buffer[curIdx++];
}
}