【HDOJ】1022 Train Problem I

栈和队列训练题目。

 #include <stdio.h>
 #include <string.h>

 #define MAXNUM 1005

 char in[MAXNUM];
 char out[MAXNUM];
 char stack[MAXNUM];
 char order[MAXNUM]; // 1:in, 0:out

 int main() {
     int n;
     int i, j, k, tmp, flg;
     int top;

     while (scanf("%d %s %s", &n, in, out) != EOF) {
         top = k = ;
         for (i=; in[i]!=out[]&&i<n; ++i) {
             stack[top++] = in[i];
             order[k++] = ;
         }
         tmp = i+;
         order[k++]=; order[k++]=;
         flg = ;
         for (i=; i<n; ++i) {
             if (top) {
                 if (stack[top-] == out[i]) {
                     --top;
                     order[k++] = ;
                     continue;
                 }
                 for (j=; j<top-; ++j) {
                     if (stack[j] == out[i]) {
                         printf("No.\nFINISH\n");
                         flg = ;
                         break;
                     }
                 }
             }
             if (flg)
                 break;
             for (j=tmp; in[j]!=out[i]&&j<n; ++j) {
                 stack[top++] = in[j];
                 order[k++] = ;
             }
             tmp = j+;
             order[k++]=; order[k++]=;
         }
         if (flg)
             continue;
         printf("Yes.\n");
         for (i=; i<k; ++i)
             if (order[i])
                 printf("in\n");
             else
                 printf("out\n");
         printf("FINISH\n");
     }

     return ;
 }