diff options
Diffstat (limited to 'min_len_str_ops.c')
-rw-r--r-- | min_len_str_ops.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/min_len_str_ops.c b/min_len_str_ops.c new file mode 100644 index 0000000..0f77d83 --- /dev/null +++ b/min_len_str_ops.c @@ -0,0 +1,30 @@ +// 3223. Minimum Length of String After Operations +#include "leetcode.h" + +/* + * you are given a string 's'. you can perform the following process on 's' any + * number of times: choose an index 'i' in the string such that there is at + * least one character to the left of index 'i' that is equal to 's[i]' and at + * least one character to the right that is also equal to 's[i]', delete the + * closest character to the left of index 'i' that is equal to 's[i]', delete + * the closest character to the right of index 'i' that is equal to 's[i]'. + * return the minimum length of the final string 's' that you can achieve + */ + +int minimumLength(char *s) { + int *lower_cnt = (int *)calloc(26, sizeof(int)), ans = 0; + for (int i = 0; s[i] != '\0'; i++) { + assert(s[i] >= 'a' && s[i] <= 'z'); + lower_cnt[s[i] - 'a']++; + } + for (int i = 0; i < 26; i++) + ans += lower_cnt[i] <= 2 ? lower_cnt[i] : (lower_cnt[i] % 2 ? 1 : 2); + free(lower_cnt); + return ans; +} + +int main() { + char *s1 = "abaacbcbb", *s2 = "aa"; + printf("%d\n", minimumLength(s1)); // expect: 5 + printf("%d\n", minimumLength(s2)); // expect: 2 +} |