快速幂

    xiaoxiao2025-07-07  8

    http://baike.baidu.com/link?url=bsfNWRDMEBcTrOQDx7rfWPnwa7wqzzzNBW72_ooKnLsftubiH-CLoOIy_yaNkrINBGEqCnakdM93u0Xrf-zf9K int pow3(int x,int n) { if(n==0) return 1; else { while((n&1)==0) { n>>=1; x*=x; } } int result=x; n>>=1; while(n!=0) { x*=x; if((n&1)!=0) result*=x; n>>=1; } return result; }
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