#include <stdio.h>
#include <stdlib.h>
int main(int argc, char *argv[]){
    FILE *ppm = fopen(argv[1],"rb");
    FILE *pbm = fopen(argv[2],"w");
    if (ppm==NULL || pbm == NULL) {puts("Cannot open file."); exit(0);}
    fprintf(pbm,"P1\n");
    int i=0, meja=0;
    char *vnos = (char *) malloc(1024);
    while (fscanf(ppm,"%s",vnos)==1) {
        if (vnos[0]=='#') {
            fgets(vnos,80,ppm);
        } else {
            i++;
            if (i==2 || i==3) fprintf(pbm,"%s ",vnos);
            if (i==2) meja=atoi(vnos);
        }
        if (i==4) break;
    }
    fprintf(pbm,"\n");
    int steviloZapisov=0, vsota = 0, newLine=0;
    while (fread(vnos,1,1,ppm)==1) {
        if (steviloZapisov == 3) {
            newLine++;
            if ((vsota/3)+128>127) fprintf(pbm,"1 ");
            else fprintf(pbm, "0 ");
            vsota = 0;
            steviloZapisov = 0;
        }
        int a = vnos[0];
        vsota += a;
        steviloZapisov++;
        if (newLine%meja==0) fprintf(pbm, "\n");
    }
    free(vnos);
    fclose(pbm);
    fclose(ppm);
}