diff --git a/source/solver.c b/source/solver.c
new file mode 100644
index 0000000000000000000000000000000000000000..43546c237015e776852678e96ed03ac36c410db7
--- /dev/null
+++ b/source/solver.c
@@ -0,0 +1,162 @@
+/* solver.c */
+/* Last Change: 2018/07/09 (Mon) 15:54:41. */
+
+#include<stdio.h>
+/* #include<stdlib.h> */
+#include<string.h>
+/* #include<limits.h> */
+/* #include<math.h> */
+/* #include<time.h> */
+
+int board[8][72][72];
+int depth,height,width;
+int lines;
+//z,y,x
+
+void reset(void){
+	int i,j,k;
+	for(i=0;i<depth;i++)
+		for(j=0;j<height;j++)
+			for(k=0;k<width;k++)
+				board[i][j][k]=0;
+	return;
+}
+
+void read(void){
+	int x,y,z,i;
+	char c,str[8];
+	scanf(" %s",str); //SIZE
+	scanf(" %d",&width);
+	if(width>72||width<=0)
+		printf("Error: width\n");
+	scanf(" %c",&c); //X
+	scanf(" %d",&height);
+	if(height>72||height<=0)
+		printf("Error: height\n");
+	scanf(" %c",&c); //X
+	scanf(" %d",&depth);
+	if(depth>8||depth<=0)
+		printf("Error: depth\n");
+	scanf(" %s",str); //LINE_NUM
+	scanf(" %d",&lines);
+	if(lines<=0)
+		printf("Error: lines\n");
+	for(i=1;i<=lines;i++){
+		scanf(" %s",str); //LINE#X
+		scanf(" %c",&c); //(
+		scanf(" %d",&x);
+		if(x>=72||x<0)
+			printf("Error: x\n");
+		scanf(" %c",&c); //,
+		scanf(" %d",&y);
+		if(y>=72||y<0)
+			printf("Error: y\n");
+		scanf(" %c",&c); //,
+		scanf(" %d",&z);
+		if(z>=72||z<0)
+			printf("Error: z\n");
+		scanf(" %c",&c); //)
+		board[z-1][y][x]=-i;
+		scanf("%c",&c); //)
+		/* scanf(" %[ -]",&c); //space or - */
+		scanf(" %c",&c); //(
+		scanf(" %d",&x);
+		if(x>=72||x<0)
+			printf("Error: x\n");
+		scanf(" %c",&c); //,
+		scanf(" %d",&y);
+		if(y>=72||y<0)
+			printf("Error: y\n");
+		scanf(" %c",&c); //,
+		scanf(" %d",&z);
+		if(z>=72||z<0)
+			printf("Error: z\n");
+		scanf(" %c",&c); //)
+		board[z-1][y][x]=-i;
+	}
+	return;
+}
+
+int order(int num){ //1-lines -> 1-lines
+	return num;
+}
+
+int connected(int line){
+	int i,j,k;
+	for(i=0;i<depth;i++)
+		for(j=0;j<height;j++)
+			for(k=0;k<width;k++)
+				if(board[i][j][k]==line)
+					return 1;
+	return 0;
+}
+
+int connectable(int linea,int lineb){
+	//REQUIRED
+	return 0;
+}
+
+void actuallyconnect(int num){
+	//REQUIRED
+	return;
+}
+
+void delete(int line){
+	int i,j,k;
+	for(i=0;i<depth;i++)
+		for(j=0;j<height;j++)
+			for(k=0;k<width;k++)
+				if(board[i][j][k]==line)
+					board[i][j][k]=0;
+	return;
+}
+
+void connect(int num){
+	int i;
+	if(connectable(order(num),0))
+		actuallyconnect(order(num));
+	else
+		for(i=num-1;i>=1;i--)
+			if(connectable(order(num),order(i))){
+				delete(order(i));
+				actuallyconnect(order(num));
+				connect(i);
+			}
+	return;
+}
+
+void solve(void){
+	int i;
+	for(i=1;i<=lines;i++)
+		connect(i);
+	return;
+}
+
+void write(void){
+	int i,j,k;
+	printf("SIZE %dX%dX%d\n",width,height,depth);
+	for(k=0;k<depth;k++){
+		printf("LAYER %d\n",k+1);
+		for(j=0;j<height;j++){
+			for(i=0;i<width-1;i++){
+				if(board[k][j][i]<0)
+					board[k][j][i]=-board[k][j][i];
+				printf("%d,",board[k][j][i]);
+			}
+			if(board[k][j][i]<0)
+				board[k][j][i]=-board[k][j][i];
+			printf("%d",board[k][j][i]);
+			printf("\n");
+		}
+	}
+	return;
+}
+
+int main(void){
+	reset();
+	read();
+	solve();
+	write();
+	return 0;
+}
+