fix

README.md

 Usage:
 
-gcc *.c -O0 -lm -g -o main -Wall;
+gcc *.c -O0 -lm -g -o main -Wall
 
 ./main

solver.c

 /* solver.c */
-/* Last Change: 2019/07/25 (Thu) 14:03:43. */
+/* Last Change: 2019/07/25 (Thu) 14:15:35. */
 
 #include<stdio.h>
 #include<limits.h>
@@ -9,7 +9,7 @@
 #include"io.h"
 /* #include<string.h> */
 /* #include<math.h> */
-#define DEBUG 1
+#define DEBUG 0
 #define ABS(a) ((a) < 0 ? - (a) : (a))
 #define MAX(a, b) ((a) > (b) ? (a) : (b))
 
@@ -392,6 +392,7 @@ short int try_wires(short int blockid){
 						found++;
 			if(found==2){
 				line[lines]=block_data[blockid][i][2];
+				if(DEBUG)
 					printf("#%d   Block %d requires line %d\n",attempts,blockid,block_data[blockid][i][2]);
 				lines++;
 			}