hdu 1022 Train Problem I 解题报告
题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1022
又是一道栈的练习,这次也是没有用到STL中的栈来实现。用来保存操作过程的数组(process[])一定要开得足够大(一开始开小了导致wa)
#include <iostream>
#include <string.h>
#include <stdio.h>
using namespace std; const int maxn = ;
int main()
{
char o1[maxn], o2[maxn], stack[maxn];
int i, j, n, a, b, k, process[];
while (scanf("%d", &n) != EOF)
{
scanf("%d%d", &a, &b);
sprintf(o1, "%d", a); // 把整型的a、b转化成字符串,当然这里可以直接在第11行中写成while(scanf("%d%s%s", &n, o1, o2) != EOF)
sprintf(o2, "%d", b);
// cout << "o1 = " << o1 << endl;
// cout << "o2 = " << o2 << endl;
int top = ;
int ok = ;
k = i = j = ;
memset(process, , sizeof(process));
while (j < n)
{
/* if (o1[i] == o2[j])
{
i++;
j++;
} */ // 如果进栈和出栈的顺序刚好相同,则省去不必要的进栈和出栈操作,不过这里为了缩短代码所以干脆注释掉
if (top && stack[top] == o2[j])
{
top--;
j++;
process[k] = ; // 保存出栈操作out
}
else if (i < n)
{
stack[++top] = o1[i++];
process[k] = ; // 保存进栈操作in
}
else
{
ok = ;
break;
}
k++;
}
if (ok)
{
printf("Yes.\n");
for (i = ; i < k; i++)
{
printf("%s\n", (process[i] ? "in" : "out"));
}
}
else
printf("No.\n");
printf("FINISH\n");
}
return ;
}
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