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Q1010.java
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Q1010.java
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package forRank;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.util.StringTokenizer;
public class Q1010 {
private static final int SIZE = 30;
public static void main(String[] args) throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
int T = Integer.parseInt(br.readLine());
int dp[][] = new int[SIZE][SIZE];
for (int i = 0; i < SIZE; i++)
dp[1][i] = i;
for (int i = 2; i < SIZE; i++) {
for (int j = i; j < SIZE; j++) {
for (int k = 0; k < j - i + 1; k++) {
dp[i][j] += dp[i - 1][j - k - 1];
}
}
}
for (int i = 0; i < T; i++) {
StringTokenizer st = new StringTokenizer(br.readLine());
int N = Integer.parseInt(st.nextToken());
int M = Integer.parseInt(st.nextToken());
bw.write(dp[N][M] + "\n");
}
br.close();
bw.close();
}
}