{}
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
// char*c(char*s,char*i){char*r=malloc(strlen(s)),*z,o,t;r=strcpy(r,s);for(;*i;++i){z=strchr(r,'|');o=(*i==60&&z-r)?-1:(*i==62&&z[1])?1:0;t=*z;*z=z[o];z[o]=t;if(*i==35&&z-r)memmove(z-1,z,strlen(z)+1);}return r;}
char *c(char *s, char *i)
{
char *r = malloc(strlen(s)), *z, o, t;
r = strcpy(r, s);
for (; *i; ++i)
{
z = strchr(r, '|');
o = (*i == 60 && z - r) ? -1 : (*i == 62 && z[1]) ? 1 : 0;
t = *z;
*z = z[o];
z[o] = t;
if (*i == 35 && z - r)
memmove(z-1, z, strlen(z)+1);
}
return r;
}
int main(void)
{
char *res = c("This is a test|", "#<<<<<######>");
assert(strcmp(res, "Tha| tes") == 0);
free(res);
res = c("Curs|or end test", ">>>>>>>>>>>>><>");
assert(strcmp(res, "Cursor end test|") == 0);
free(res);
res = c("Cursor s|tart test", "<<<<<<<<<<<><");
assert(strcmp(res, "|Cursor start test") == 0);
free(res);
res = c("Delete all|", "##############><<<");
assert(strcmp(res, "|") == 0);
free(res);
res = c("|", ">><##>");
assert(strcmp(res, "|") == 0);
free(res);
return EXIT_SUCCESS;
}