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pow x^n
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//'main' method must be in a class 'Rextester'. //Compiler version 1.8.0_111 import java.util.*; import java.lang.*; class Rextester { public static int pow(int x, int n){// x^n int result = 1; while(n>0){ if(n%2 == 1){ result *= x; } n /= 2; x *= x; } return result; } public static void main(String args[]) { System.out.println("2^2=" + pow(2, 2)); System.out.println("2^3=" + pow(2, 3)); System.out.println("2^4=" + pow(2, 4)); System.out.println("2^5=" + pow(2, 5)); } }
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Compilation time: 0.73 sec, absolute running time: 0.14 sec, cpu time: 0.12 sec, memory peak: 18 Mb, absolute service time: 0,88 sec
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2^2=4 2^3=8 2^4=16 2^5=32