S. Substring Diff - 2018.9 ECNU ICPC/CCPC Trial Round #2 - ECNU Online Judge

你可以在这里下载。

单点时限: 2.0 sec

内存限制: 512 MB

样例

Input

3
2 tabriz torino
0 abacba abcaba
3 helloworld yellomarin

Output

4
3
8

NaN

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