The count-and-say sequence implementation

Source: Internet
Author: User

The count-and-say sequence is the sequence of integers beginning as follows:
1, 11, 21,121 1, 111221 ,...

1Is read off"One 1"Or11.
11Is read off"Two 1 s"Or21.
21Is read off"One 2, ThenOne 1"Or1211.

Given an integerN, GenerateNTh sequence.

Note: The sequence of integers will be represented as a string.

Class solution {public: String countandsay (int n) {string res = "1"; string cur = "1 ";
If (1 = N)
Return res;
For (INT I = 1; I <n; I ++) {res. clear (); // For The Next calculation, the current int ncurlen = cur. size (); For (Int J = 0; j <ncurlen; j ++) {int ncount = 1; while (cur [J] = cur [J + 1] & J + 1 <ncurlen) {++ ncount; // count + 1 + + J; // character backward shifting} res + = ncount + '0'; Res + = cur [J]; ncount = 1 ;}cur = res ;}return res ;}};

The count-and-say sequence implementation

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