Divide Two Integers
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class Solution {public: int divide(int dividend, int divisor) { assert(divisor!=0);long long dend=dividend;long long sor=divisor;bool isNotNeg=(dend>=0 && sor>0) ||(dend<=0 && sor <0);dend=dend>=0?dend:-dend;sor=sor>=0?sor:-sor;long long result=0;while(dend >= sor){//加速long long accele=sor;long long tmp=1;while(dend >= accele+accele){accele<<=1;tmp<<=1;}dend-=accele;result+=tmp;}return isNotNeg?result:(-result);}}; 0 0
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