AoC 9 Part 1

//just wc the output. And subtract one, for the EOF :-)
#include <stdio.h>
#include <stdlib.h>

int main(int argc, char** argv)
{
    char c;
    while((c=getchar())!= EOF){
        if(c=='('){
            int len /*= readint()*/;
            scanf("%d", &len);
            getchar();//discard x
            int i /*= readint()*/;
            scanf("%d", &i);
            getchar();//discard )
            char* buf = malloc((len + 1) * (sizeof(char)));
            if (buf == NULL) return -1;
            int s = fread(buf, 1, len, stdin);
            if (s != len) return -2;
            buf[len]='\0';//this works, because sizeof(buf)=len+1.
            for(;i>0;i--) printf("%s", buf);
            free(buf);
        }else{putchar(c);}
    }
    return 0;
}