sicily-1029 Rabbit

 1 //
 2 //  main.cpp
 3 //  sicily-1029
 4 //
 5 //  Created by ashley on 14-12-5.
 6 //  Copyright (c) 2014年 ashley. All rights reserved.
 7 //
 8 
 9 #include <iostream>
10 #include <string>
11 using namespace std;
12 string ans[10];
13 string clearZeros(string data)
14 {
15     if (data[0] == ‘0‘) {
16         int key = (int) data.length() - 1;
17         for (int i = 0; i < data.length(); i++) {
18             if (data[i] != ‘0‘) {
19                 key = i;
20                 break;
21             }
22         }
23         data.erase(0, key);
24     }
25     if (data == "") {
26         data = "0";
27     }
28     return data;
29 }
30 
31 //对位操作
32 void countPoint(string &operand1, string &operand2)
33 {
34     while (operand1.length() < operand2.length()) {
35         operand1 = "0" + operand1;
36     }
37     while (operand1.length() > operand2.length()) {
38         operand2 = "0" + operand2;
39     }
40 }
41 
42 string addition(string addent, string adder)
43 {
44     //先对位，在加数和被加数前面适当补0，使他们包含相同的位数
45     countPoint(addent, adder);
46     //前面再补一个0，确定和的最多位数
47     addent = "0" + addent;
48     adder = "0" + adder;
49     //从低位开始，对应位相加，结果写进被加数中，如果有进位，直接给被加数前一位加1
50     for (int i = (int) addent.length() - 1; i > 0; i--) {
51         addent[i] = addent[i] + adder[i] - 48;
52         if (addent[i] > ‘9‘) {
53             addent[i] = addent[i] - 10;
54             addent[i - 1] = addent[i - 1] + 1;
55         }
56     }
57     return clearZeros(addent);
58 }
59 
60 int main(int argc, const char * argv[])
61 {
62     int month, deadline;
63     while (cin >> month >> deadline) {
64         if (month == 0 && deadline == 0) {
65             break;
66         }
67         string increment;
68         increment = "1";
69         ans[0] = "1";
70         for (int i = 1; i <= month - 1; i++) {
71             ans[i] = addition(ans[i - 1], increment);
72         }
73         for (int i = month; i <= deadline; i++) {
74             increment = ans[i % month];
75             ans[i % month] = addition(ans[(i - 1) % month], increment);
76         }
77         cout << ans[deadline % month] << endl;
78     }
79     return 0;
80 }