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| // https://helloacm.com/exponentiation-by-squaring/ | |
| public static int pow(int base, int exp) { | |
| int ret = 1; | |
| while(exp != 0) { | |
| if(exp % 2 == 1) { | |
| ret *= base; | |
| exp -= 1; | |
| } | |
| base *= base; | |
| exp /= 2; | |
| } | |
| return ret; | |
| } |
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