import java.io.*;
public class Main {
public static void main(String[] args) throws IOException {
BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
PrintWriter out = new PrintWriter(new OutputStreamWriter(System.out));
int n = Integer.parseInt(bf.readLine());
String[] s = bf.readLine().split(" ");
int a[] = new int[n + 1];
for (int i = 1; i <= n; i++) {
a[Math.abs(Integer.parseInt(s[i - 1]) - i)]++;
}
for (int j = n - 1; j >= 0; j--) {
if (a[j] > 1) {
System.out.println(j + " " + a[j]);
}
continue;
}
}
}
PAT_B_1083_Java(20分)
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转载自blog.csdn.net/qq_43511405/article/details/107430331
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