diff options
Diffstat (limited to 'min_del_make_str_special.c')
-rw-r--r-- | min_del_make_str_special.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/min_del_make_str_special.c b/min_del_make_str_special.c new file mode 100644 index 0000000..cdac8f0 --- /dev/null +++ b/min_del_make_str_special.c @@ -0,0 +1,30 @@ +// 3085. Minimum Deletions to Make String K-Special +#include "leetcode.h" + +/* + * you are given a string 'word' and an integer 'k'. we consider 'word' to be + * k-special if '|freq(word[i]) - freq(word[j])| <= k' for all indices 'i' and + * 'j' in the string. here, 'freq(x)' denotes the frequency of the character 'x' + * in the 'word'. and '|y|' denotes the absolute value of 'y'. return the + * minimum number of characters you need to delete to make 'word' k-special. + */ + +int minimumDeletions(char *word, int k) { + int freq[26] = {0}, n = strlen(word), ans = INT_MAX; + for (int i = 0; i < n; i++) + freq[word[i] - 'a']++; + for (int i = 0; i < 26; i++) { + int curr = 0; + for (int j = 0; j < 26; j++) + curr += (freq[j] < freq[i]) ? freq[j] : fmax(0, freq[j] - (freq[i] + k)); + ans = fmin(ans, curr); + } + return ans; +} + +int main() { + char *w1 = "aabcaba", *w2 = "dabdcbdcdcd", *w3 = "aaabaaa"; + printf("%d\n", minimumDeletions(w1, 0)); // expect: 3 + printf("%d\n", minimumDeletions(w2, 2)); // expect: 2 + printf("%d\n", minimumDeletions(w3, 2)); // expect: 1 +} |