class Solution {
int temp, length;
public int divide(int dividend, int divisor) {
Boolean tag = divisor > 0 && dividend > 0 || divisor < 0 && dividend < 0;
int adividend = dividend > 0 ? -dividend: dividend;
int adivisor = divisor > 0 ? -divisor: divisor;
if (dividend == 0x80000000 && divisor == 0x80000000)
return 1;
int ans = divid(adividend, adivisor);
return !tag ? ans:(~ans+1 < 0 ? 0x7fffffff: ~ans + 1);
}
int divid(int dividend, int divisor){
StringBuffer ans = new StringBuffer();
ans.append('-');
String did = String.valueOf(dividend);
if (dividend > divisor)
return 0;
temp = 0;
length = String.valueOf(dividend).length();
for (int i = 1; i < length; i ++){
long tt= temp;
temp = temp << 2;
temp += tt;
//System.out.println(tt);
temp = temp << 1;
temp += -(did.charAt(i) - '0');
if (temp > divisor){
if (ans.length() > 1){
ans.append('0');
}
continue;
}
int t = 0;
while(temp - divisor <= 0){
t += 1;
temp -= divisor;
}
ans.append((char)('0' + t));
}
int t = Integer.parseInt(ans.toString());
return t;
}
}