60 lines
1.2 KiB
C
60 lines
1.2 KiB
C
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#define MAX 1000000
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int transform(char *src, int len, char *dst) {
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// Traverse the string
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int i = len;
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int j = 0;
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while (i > 0) {
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// printf("%c\n", src[i]);
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// If we encounter a backspace, we need to remove the last character
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// from the destination string
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if (src[i] == 'B') {
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if (j > 0) {
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j--;
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}
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} else if (src[i] == 'L') {
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// If we encounter a left button, we have to move back once
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if (j > 0) {
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j--;
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}
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} else if (src[i] == 'R') {
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// If we encounter a right button, we have to move forward once
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if (j < len) {
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j++;
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}
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}
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else {
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// Otherwise, we add the character to the destination string
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dst[j] = src[i];
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j++;
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}
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i--;
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}
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return j;
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}
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void printStr(char *s, int len) {
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for (int i = 0; i < len; ++i) {
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printf("%c", s[i]);
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}
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printf("\n");
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}
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int main(int argc, char **argv) {
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char s[MAX];
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scanf("%s", s);
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int len = strlen(s);
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printf("%d\n", len);
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char corrected[MAX];
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int newLen = transform(s, len, corrected);
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printf("%d\n", newLen);
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printStr(corrected, newLen);
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return 0;
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}
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