Submission #886036

#	Time	Username	Problem	Language	Result	Execution time	Memory
886036		CDuong	Sum Zero (RMI20_sumzero)	Kotlin (JVM)	0 / 100	478 ms	32336 KiB

sumzero

import kotlin.math.*
import java.util.Vector

private fun readLn() = readLine()!!
private fun readInt() = readLn().toInt()
private fun readLong() = readLn().toLong()
private fun readStrings() = readLn().split(" ")
private fun readInts() = readStrings().map { it.toInt() }
private fun readLongs() = readStrings().map { it.toLong() }

fun main() {
    var n = readInt()
    var a = readInts()
    var i: Int = 0

    i = 1
    var cope = Array(10) { 1 }
    while (i < 10) {
        cope[i] = cope[i - 1] * 4
        i++
    }

    var nxt = Array(10) { Array<Int>(n + 2) { n + 1 } }

    var mp = mutableMapOf<Long, Int>()
    mp[0] = 0
    
    i = 0
    var cur_sum: Long = 0
    while (i < n) {
        cur_sum += a[i]
        if (mp[cur_sum] != null) {
            // println(mp[cur_sum])
            nxt[0][mp[cur_sum]!!] = i + 1
        }
        mp[cur_sum] = i + 1;
        i++;
    }

    i = n;
    while (i >= 0) {
        nxt[0][i] = min(nxt[0][i], nxt[0][i + 1])
        i--
    }

    i = 1
    var j = 0
    while (i < 10) {
        j = 0
        while (j < n) {
            nxt[i][j] = nxt[i - 1][nxt[i - 1][nxt[i - 1][nxt[i - 1][j]]]]
            // println("${i}, ${j}, ${nxt[i][j]}")
            j++
        }
        i++;
    }

    var q = readInt()
    repeat(q) {
        var (l, r) = readInts()
        l--

        var res = 0
        i = 9
        while (i >= 0 && l < n) {
            while (nxt[i][l] <= r) {
                res += cope[i]
                l = nxt[i][l]
            }
            i--
        }
        println(res)
    }

    // i = 0
    // while (i < n) {
    //     println(nxt[0][i])
    //     i++
    // }
}

Compilation message (stderr)

sumzero.kt:14:18: warning: variable 'i' initializer is redundant
    var i: Int = 0
                 ^
sumzero.kt:47:13: warning: variable 'j' initializer is redundant
    var j = 0
            ^

• Subtask 1: 0 / 22
• Subtask 2: 0 / 39
• Subtask 3: 0 / 39