diff --git a/main.cpp b/main.cpp
index 3b67d95f9f6fc57a33f2d21b6667e341d3605f87..7c3cad0f3c436556d0936107332c35881cae7c0a 100644
--- a/main.cpp
+++ b/main.cpp
@@ -6,8 +6,12 @@
 
 int main(void){
 	read_problem();
-	solver();
-	print_answer();
+	if(solver()){
+		printf("success!");
+		print_answer();
+	}else{
+		printf("failed...");
+	}
 
 	return 0;
 }
diff --git a/solve b/solve
index 6e58acf23ab151dcd6679f52951a47aed3e70020..1e3d56667516d49782cbb78b7f75adef388a2239 100644
Binary files a/solve and b/solve differ
diff --git a/solver.cpp b/solver.cpp
index ffbb35d857ac9d308c7d83e62c92617657fcf8b3..5017f10db7d2febf4484b8bf5e7a911d5cc75635 100644
--- a/solver.cpp
+++ b/solver.cpp
@@ -26,6 +26,7 @@ short int board_str[900];
 short int line_board[72][72];
 short int mino_board[72][72];
 short int put_data[72][72];
+short int success=0;
 vector <int> mino_order;
 
 void reset_board(void){
@@ -552,6 +553,7 @@ int line(){
 		if(status){
 		//std::cout << "success to line" << std::endl;
 		make_answer();
+		success=1;
 	}else{
 		//std::cout << "failed to line" << std::endl;
 	}
@@ -1010,11 +1012,11 @@ void solve(void){
 	return;
 }
 
-void solver(void){
+int solver(void){
 	read_data();
 	solve();
 	/* shape(); */
 	//translate();
-	return;
+	return success;
 }
 
diff --git a/solver.h b/solver.h
index e90033da802910604ece9941affa4f6f945b0882..1045636ead71eded19d0839d4bf16fcf959b7862 100644
--- a/solver.h
+++ b/solver.h
@@ -5,6 +5,6 @@
 
 #define MAXSIZE 128
 
-void solver(void);
+int solver(void);
 
 #endif // _SOLVER_H_