string countAndSay(int n) {

string result = "";

if(n == 0) return result;

result = "1";

while(--n) {

string tmp = "";

for(int i = 0; i < result.length(); i++) {

int count = 1;

char digit = result[i];

while(i + 1 < result.length() and result[i] == result[i + 1]) {

i++;

count++;

}

tmp += char(count + '0');

tmp += digit;

}

result = tmp;

}

return result;

}