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1017.cpp
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1017.cpp
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sample 4 ms submission
class Solution {
public:
string baseNeg2(int n) {
if (n == 0) return "0";
string ret;
int base = -2; // Be more general
while (n) {
ret = to_string(abs(n % base)) + ret;
if (n % base != 0 && n < 0) {
n += n % base;
}
n /= base;
}
return ret;
}
};
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class Solution {
public:
string baseNeg2(int N, string res = "") {
while (N != 0) {
int rem = N % -2;
N /= -2;
if (rem < 0) rem += 2, N += 1;
res = to_string(rem) + res;
}
return max(string("0"), res);
}
};
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