题目
c ``` class Solution { public: string a[31]; string countAndSay(int n) {
代码语言:javascript复制 a[1]="1";
for(int i=2;i<=30;i )
{
char s1=a[i-1][0];int num=1;
string str="";
for(int j=1;j<a[i-1].size();j )
{
if(a[i-1][j]!=a[i-1][j-1])
{
char x = num '0';
str =x;
str =s1;
num=1;
s1=a[i-1][j];
continue;
}
else
num ;
}
char x = num '0';
str = x;
str = s1;
a[i]=str;
}
return a[n];
}
}; ``