1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
|
// 2109. Adding Spaces to a String
#include "leetcode.h"
/*
* given a 0-indexed string 's' and a 0-indexed integer array 'spaces' that
* describes the indices in the original string where spaces will be added. each
* space should be inserted before the character at the given index. return the
* modified string after the spaces have been added
*/
char *addSpaces(char *s, int *spaces, int spacesSize) {
int n = strlen(s), m = n + spacesSize + 1;
char *ans = (char *)malloc(m * sizeof(char));
ans[m - 1] = '\0';
int aidx = 0, bidx = 0;
int *num = (int *)malloc(spacesSize * sizeof(int));
num[0] = spaces[0];
for (int i = 1; i < spacesSize; i++)
num[i] = spaces[i] - spaces[i - 1];
for (int i = 0; i < spacesSize; i++) {
strncpy(&ans[aidx], &s[bidx], num[i]);
aidx += num[i];
bidx += num[i];
ans[aidx] = ' ';
aidx++;
}
strncpy(&ans[aidx], &s[bidx], m - aidx);
free(num);
return ans;
}
int main() {
char *s1 = "LeetcodeHelpsMeLearn", *s2 = "icodeinpython", *s3 = "spaceing";
int n1[] = {8, 13, 15}, n2[] = {1, 5, 7, 9}, n3[] = {0, 1, 2, 3, 4, 5, 6};
printf("%s\n",
addSpaces(s1, n1, ARRAY_SIZE(n1))); // expect: Leetcode Helps Me Learn
printf("%s\n",
addSpaces(s2, n2, ARRAY_SIZE(n2))); // expect: i code in py thon
printf("%s\n", addSpaces(s3, n3, ARRAY_SIZE(n3))); // s p a c i n g
}
|