UVa 133 The Dole Queue (模拟循环链表)
2013-10-22 09:55
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133 - The Dole Queue
Time limit: 3.000 secondshttp://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=103&page=show_problem&problem=69
In a serious attempt to downsize (reduce) the dole queue, The New National Green Labour Rhinoceros Party has decided on the following strategy. Every day all dole applicants will be placed in a large circle, facing
inwards. Someone is arbitrarily chosen as number 1, and the rest are numbered counter-clockwise up to N (who will be standing on 1's left). Starting from 1 and moving counter-clockwise, one labour official counts off k applicants, while another official starts
from N and moves clockwise, counting m applicants. The two who are chosen are then sent off for retraining; if both officials pick the same person she (he) is sent off to become a politician. Each official then starts counting again at the next available person
and the process continues until no-one is left. Note that the two victims (sorry, trainees) leave the ring simultaneously, so it is possible for one official to count a person already selected by the other official.
Input
Write a program that will successively read in (in that order) the three numbers (N, k and m; k, m > 0, 0 < N < 20) and determine the order in which the applicants are sent off for retraining. Each set of three numberswill be on a separate line and the end of data will be signalled by three zeroes (0 0 0).
Output
For each triplet, output a single line of numbers specifying the order in which people are chosen. Each number should be in a field of 3 characters. For pairs of numbers list the person chosen by the counter-clockwiseofficial first. Separate successive pairs (or singletons) by commas (but there should not be a trailing comma).
Sample input
10 4 3 0 0 0
Sample output
4
8,
9
5,
3
1,
2
6,
10,
7
where
represents a space.
完整代码:
/*0.015s*/ #include<cstdio> #include<cstring> int people[20]; bool vis[20]; int main() { int n, k, m, i, left, count, flag1, flag2; for (i = 1; i < 20; ++i) people[i] = i; while (scanf("%d%d%d", &n, &k, &m), n) { memset(vis, 0, sizeof(vis)); left = n; flag1 = 0, flag2 = n - 1; while (left) { for (count = 1;; flag1 = (flag1 + 1) % n) { if (!vis[flag1]) { if (count < k) ++count; else { printf("%3d", flag1 + 1);///我被题意误导了,PE了一次... --left; break; } } } for (count = 1;; flag2 = (flag2 - 1 + n) % n) { if (!vis[flag2]) { if (count < m) ++count; else { if (flag2 != flag1) printf("%3d", flag2 + 1), --left; vis[flag1] = vis[flag2] = true; break; } } } if (left) putchar(','); } putchar(10); } return 0; }
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