題目要求

P5729題目鏈接

分析

這題吧，其實也還好吧……

思維呢，簡單一些，開一個三維數組，防爆就byte唄，每次都把指定范圍內的點全切掉，最后統計一下剩下的就行……

別想太多是吧……

AC代碼（Java語言描述）

import java.util.Scanner;public class Main {public static void main(String[] args) {Scanner scanner = new Scanner(System.in);byte x = scanner.nextByte(), y = scanner.nextByte(), z = scanner.nextByte(), num = scanner.nextByte();byte[][][] cuboid = new byte[x+1][y+1][z+1];for (byte i = 0; i < num; i++) {byte x1 = scanner.nextByte(), y1 = scanner.nextByte(), z1 = scanner.nextByte();byte x2 = scanner.nextByte(), y2 = scanner.nextByte(), z2 = scanner.nextByte();for (byte j = x1; j <= x2; j++) {for (byte k = y1; k <= y2; k++) {for (byte l = z1; l <= z2; l++) {cuboid[j][k][l] = 1;}}}}scanner.close();int counter = 0;for (byte i = 1; i <= x; i++) {for (byte j = 1; j <= y; j++) {for (byte k = 1; k <= z; k++) {if (cuboid[i][j][k] == 0) {counter++;}}}}System.out.println(counter);} }

總結

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