using System;
using System.Collections.Generic;
using System.Linq;

class G
{
	static int[] Read() => Array.ConvertAll(Console.ReadLine().Split(), int.Parse);
	static (int, int) Read2() { var a = Read(); return (a[0], a[1]); }
	static void Main() => Console.WriteLine(Solve());
	static object Solve()
	{
		var (n, qc) = Read2();
		var s = Console.ReadLine();
		var qs = Array.ConvertAll(new bool[qc], _ => Read2());

		var map = Array.ConvertAll(new bool[n + 1], _ => new List<int>());
		var end = new int[qc];

		for (int qi = 0; qi < qc; qi++)
		{
			var (x, y) = qs[qi];
			map[x].Add(qi);
			map[y].Add(qi);
			end[qi] = Math.Max(x, y);
		}

		// 片方が通過したクエリの ID
		var umap = Array.ConvertAll(map, _ => new List<int>());

		var r = new (int l, int r)[qc];
		var st = new Stack<int>();
		st.Push(0);

		for (int i = 1; i <= n; i++)
		{
			if (s[i - 1] == '(')
			{
				st.Push(i);

				foreach (var qi in map[i])
					if (i < end[qi]) umap[i].Add(qi);
			}
			else
			{
				var l = st.Pop();
				var pl = st.Peek();

				foreach (var qi in map[i])
					if (i < end[qi]) umap[l].Add(qi);

				foreach (var qi in umap[l])
				{
					if (end[qi] <= i)
					{
						r[qi] = (l, i);
					}
					else
					{
						umap[pl].Add(qi);
					}
				}
			}
		}

		return string.Join("\n", r.Select(p => p.l == 0 ? "-1" : $"{p.l} {p.r}"));
	}
}