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Number_Complement.cpp

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class Solution {

public:

int findComplement(int n) {

int complement = 0;

int msb = log((double) n) / log(2.0);

for(int bit = 0; bit <= msb; bit++) {

if(n & (1 << bit)) {

complement &= ~(1 << bit);

} else {

complement |= (1 << bit);

}

}

return complement;

}

};