Language: Java

import java.io.BufferedReader;
import java.io.InputStreamReader;

class Main{
	static int points0[][];
	public static void main(String args[]){
		// 標準入力準備
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		//Scanner sc = new Scanner(System.in);
		//String str = new String();

		try{
			while(true){
				// 折れ線の数
				int n = Integer.parseInt(br.readLine());
				if(n == 0) return;

				// 最初のひとつ
				points0 = input(br);
				//printPoints(points0);

				//比較
				for(int i = 1; i <= n; i++){
					int pointsi[][] = input(br);
					//printPoints(points0);
					if(compare(points0, pointsi)) System.out.println(i);
				}
				System.out.println("+++++");

			}

		}catch(Exception e){
			System.err.println(e);
		}
	}

	static boolean compare(int points1[][], int points2[][]){
		return compareAsce(points1, points2) ||  compareDsce(points1, points2);
	}

	static boolean compareAsce(int points1[][], int points2[][]){
		return compare0(points1, points2) || compare90(points1, points2) || compare180(points1, points2);
	}

	static boolean compareDsce(int points1[][], int points2[][]){
		// 逆向きにする
		int points2_reverse[][] = new int[points2.length][2];
		int originx = points2[points2.length - 1][0];
		int originy = points2[points2.length - 1][1];
		points2_reverse[0][0] = 0;
		points2_reverse[0][1] = 0;
		for(int i = 1; i < points2.length; i++){
			points2_reverse[i][0] = points2[points2.length - 1 - i][0] - originx;
			points2_reverse[i][1] = points2[points2.length - 1 - i][1] - originy;
		}
		return compareAsce(points1, points2_reverse);
	}

	static boolean compare0(int points1[][], int points2[][]){
		return true;
		for(int i = 0; i < points1.length; i++){
			if(points1[i][0] != points2[i][0] || points1[i][1] != points2[i][1]) return false;
		}
		return true;
	}

	static boolean compare90(int points1[][], int points2[][]){
		for(int i = 0; i < points1.length; i++){
			if(points1[i][0] != points2[i][1] || points1[i][1] != 0 - points2[i][0]) return false;
		}
		return true;
	}

	static boolean compare180(int points1[][], int points2[][]){
		for(int i = 0; i < points1.length; i++){
			if(points1[i][0] != 0 - points2[i][0] || points1[i][1] != 0 - points2[i][1]) return false;
		}
		return true;
	}

	static boolean compare270(int points1[][], int points2[][]){
		for(int i = 0; i < points1.length; i++){
			if(points1[i][0] != 0 - points2[i][1] || points1[i][1] != points2[i][0]) return false;
		}
		return true;
	}

	static int[][] input(BufferedReader br) throws Exception{
		int m = Integer.parseInt(br.readLine());
		int points[][] = new int[m][2];

		// 原点を0に
		String strs[] = br.readLine().split(" ");
		int originx = Integer.parseInt(strs[0]);
		int originy = Integer.parseInt(strs[1]);
		//System.out.println("原点: (" + originx + ", " + originy + ")");
		points[0][0] = 0;
		points[0][1] = 0;

		for(int i = 1; i < m; i++){
			strs = br.readLine().split(" ");
			points[i][0] = Integer.parseInt(strs[0]) - originx;
			points[i][1] = Integer.parseInt(strs[1]) - originy;
		}
		return points;
	}

	static void printPoints(int points[][]){
		for(int i = 0; i < points.length; i++){
			System.out.print("(" + points[i][0] + ", " + points[i][1] + ")\t");
		}
		System.out.println();
	}
}

Compiler output:
Main.java:61: error: unreachable statement
		for(int i = 0; i < points1.length; i++){
		^
1 error