var baseNeg2 = function(N) {
let res = "";
while (N != 0) {
res = (N & 1) + res;
N = -(N >> 1);
}
return res == "" ? "0" : res;
};
var baseNeg2 = function(N) {
let res = "";
while (N != 0) {
res = (N & 1) + res;
N = -(N >> 1);
}
return res == "" ? "0" : res;
};