/in/main.c: In function 'loop':
/in/main.c:66:47: warning: format '%c' expects argument of type 'char *', but argument 4 has type 'int *' [-Wformat=]
                 if (sscanf(buffer, "PLACE %d %c", &x, &y) == 2) {
                                              ~^       ~~
                                              %lc