題目:
Number Sequence
Time Limit: 10000/5000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 19270 Accepted Submission(s): 8280
描述:kmp模板題
題解:直接套版
代碼:
#include <cstdio>
#include <cstring>
#include <algorithm>
using namespace std;
const int maxn = 1e7 + 5;
int text[maxn], pattern[maxn];
int nxt[maxn];
int main()
{
//freopen("input.txt", "r", stdin);
int T;
scanf("%d", &T);
while (T--)
{
int n, m;
scanf("%d%d", &n, &m);
for (int i = 0; i < n; i++)
{
scanf("%d", &text[i]);
}
for (int i = 0; i < m; i++)
{
scanf("%d", &pattern[i]);
}
for (int i = 0, j = -1; i <= m; i++, j++)
{
nxt[i] = j;
while (~j && pattern[i] != pattern[j])
j = nxt[j];
}
int flag = 0;
for (int i = 0, j = 0; i <= n; i++, j++) //注意邊界
{
if (j == m)
{
printf("%d\n", i - m+1);
flag = 1;
break;
}
while (~j && text[i] != pattern[j])
j = nxt[j];
}
if (!flag)
printf("-1\n");
}
return 0;
}