#include <stdio.h> #include <string.h> int main(void) { char str[1000],s[1000]; while(scanf("%s",str) != EOF) { int i,index = 0,k = 0; for(i = strlen(str) - 1;i >= 0;i--) { if(str[i] != ',') { index++; s[k++] = str[i]; if(index == 3) { s[k++] = ','; index = 0; } } } s[k] = '\0'; for(i = k - 1;i > -1;i--) { printf("%c",s[i]); } printf("\n"); } return 0; } |
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