import java.io.PrintWriter import java.util.* import kotlin.math.* fun PrintWriter.solve() { val n = nextInt() val q = nextInt() val a = Array(n) { nextInt() } for (_i in 0 until q) { val t = nextInt() val x = nextInt() val y = nextInt() if (t == 1) { a[x - 1] = y } else { var count = 0 for (i in y - 1 downTo x - 1) { if (a[i] == 1) count++ else break if (i == x - 1) count++ } println(if (count % 2 == 0) "F" else "S") } } } fun main() { Thread(null, { val writer = PrintWriter(System.out, false) writer.solve() writer.flush() }, "solve", abs(1L.shl(26))) .apply { setUncaughtExceptionHandler { _, e -> e.printStackTrace(); kotlin.system.exitProcess(1) } } .apply { start() }.join() } // region Scanner private var st = StringTokenizer("") private val br = System.`in`.bufferedReader() fun next(): String { while (!st.hasMoreTokens()) st = StringTokenizer(br.readLine()) return st.nextToken() } fun nextInt() = next().toInt() fun nextLong() = next().toLong() fun nextLine() = br.readLine() fun nextDouble() = next().toDouble() // endregion