题目：

题解：

#define MAX(a, b) ((a) > (b) ? (a) : (b))bool is_subseq(const char *s, const char *t) {int pt_s = 0, pt_t = 0;int len_s = strlen(s), len_t = strlen(t);while (pt_s < len_s && pt_t < len_t) {if (s[pt_s] == t[pt_t]) {++pt_s;}++pt_t;}return pt_s == len_s;
}int findLUSlength(char ** strs, int strsSize){int ans = -1;for (int i = 0; i < strsSize; ++i) {bool check = true;for (int j = 0; j < strsSize; ++j) {if (i != j && is_subseq(strs[i], strs[j])) {check = false;break;}}if (check) {ans = MAX(ans, (int)strlen(strs[i]));}}return ans;
}