include<bits/stdc++.h>
include<bits/stdc++.h>
include<bits/stdc++.h>
using namespace std;
using namespace std;
using namespace std;
int main(){
int main(){
int main(){
ruturn 0;
ruturn 0;
ruturn 0;
include<bits/stdc++.h>
include<bits/stdc++.h>
include<bits/stdc++.h>
using namespace std;
using namespace std;
using namespace std;
int main(){
int main(){
int main(){
ruturn 0;
ruturn 0;
ruturn 0;