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DNA_Password.java
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DNA_Password.java
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import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.StringTokenizer;
public class DNA_Password {
private static char[] resultArr;
private static int[] alphabetArr = new int[4];
private static int[] windowArr = new int[4];
private static int resultCount = 0;
public static void main(String[] args) throws Exception {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
StringTokenizer st = new StringTokenizer(br.readLine(), " ");
int S = Integer.parseInt(st.nextToken());
int P = Integer.parseInt(st.nextToken());
initResultArr(S);
String inputValue = br.readLine();
st = new StringTokenizer(br.readLine(), " ");
mkResultArr(inputValue);
mkAlphabetArr(st);
mkWindowArr(P);
getResultCount(P);
System.out.println(resultCount);
}
private static void initResultArr(int length) {
resultArr = new char[length];
}
private static void mkResultArr(String value) {
char[] charArr = value.toCharArray();
for(int index = 0; index < charArr.length; index++) {
resultArr[index] = charArr[index];
}
}
private static void mkAlphabetArr(StringTokenizer st) {
int index = 0;
for(;st.hasMoreTokens();) {
alphabetArr[index++] = Integer.parseInt(st.nextToken());
}
}
private static void mkWindowArr(int length) {
for(int index = 0; index < length; index++) {
int convertedIndex = convertToIndex(resultArr[index]);
windowArr[convertedIndex]++;
}
}
private static void getResultCount(int targetNumber) {
for(int start = 0; start <= resultArr.length - targetNumber; start++) {
boolean flag = false;
for(int i = 0; i < 4; i++) {
if(windowArr[i] < alphabetArr[i]) {
flag = true;
break;
}
}
if(!flag) resultCount++;
if(start == resultArr.length - targetNumber) break;
windowArr[convertToIndex(resultArr[start])]--;
windowArr[convertToIndex(resultArr[start + targetNumber])]++;
}
}
private static int convertToIndex(char value) {
if(value == 'A') return 0;
if(value == 'C') return 1;
if(value == 'G') return 2;
return 3;
}
}