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frogsort.cpp
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#include<bits/stdc++.h>
using namespace std;
int main()
{
int t,N,temp,cnt,a,b,c,d,p,q,r,s;
cin>>t;
while(t--)
{
cin>>N;
int w[N],l[N];
cnt=0;
for(int i=0;i<N;i++)
{
cin>>w[i];
}
for(int i=0;i<N;i++)
{
cin>>l[i];
}
if(N==2)
{
if(std::is_sorted(w,w+N))
cnt=0;
else if(l[0]==1)
cout<<2<<endl ;
else
cout<<1<<endl;
}
else if(N==3)
{
if(std::is_sorted(w,w+N))
cnt = 0;
else
{
for(int j=0;j<N;j++)
{
if(w[j]==1)
a = p =j;
else if(w[j]==2)
b=q=j;
else if(w[j]==3)
c=r=j;
}
p=a;
q=b;
r=c;
while(b<=a){
b+=l[q];cnt++;}
while(c<=b || c<=a){
c+=l[r];cnt++;}
}
}
else if(N==4)
{
if(std::is_sorted(w,w+N))
cnt = 0;
else
{
for(int j=0;j<N;j++)
{
if(w[j]==1)
a=j;
else if(w[j]==2)
b=j;
else if(w[j]==3)
c=j;
else if(w[j]==4)
d=j;
}
p=a;
q=b;
r=c;
s=d;
while(b<=a){
b+=l[q];cnt++;}
while(c<=b || c<=a){
c+=l[r];cnt++;}
while(d<=a || d<=b || d<=c){
d+=l[s];cnt++;}
}
}
cout<<cnt<<endl;
}
return 0;
}