[backend]将testdata/下的测例替换为了赛方测试用例，更新了测试脚本

testdata/h_functional/12_DSU.sy

@@ -0,0 +1,53 @@
+int quick_read(){
+	int ch = getch(); int x = 0, f = 0;
+	while (ch < 48 || ch > 57){
+		if (ch == 45) f = 1;
+		ch = getch();
+	}
+	while (ch >= 48 && ch <=57){
+		x = x * 10 + ch - 48;
+		ch = getch();
+	}
+	if (f) return -x;
+	else return x;
+}
+int n, m, fa[100005];
+void init(){
+	int i = 1;
+	while (i <= n){
+		fa[i] = i;
+		i = i + 1;
+	}
+}
+int find(int x){
+	if (fa[x] == x) return x;
+	else{
+		int pa = find(fa[x]);
+		fa[x] = pa;
+		return pa;
+	}
+}
+int same(int x, int y){
+	if (find(x) == find(y)) return 1;
+	return 0;
+}
+int main(){
+	n = quick_read(); m = quick_read();
+	init();
+	while (m){
+		int ch = getch();
+		while (ch != 81 && ch != 85){
+			ch = getch();
+		}
+		if (ch == 81){ // query
+			int x = quick_read(), y = quick_read();
+			putint(same(x, y));
+			putch(10);
+		}else{ // union
+			int x = find(quick_read()), y = find(quick_read());
+			fa[x] = y;
+		}
+		m = m - 1;
+	}
+	return 0;
+}