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23.cpp
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80 lines (75 loc) · 1.63 KB
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#include<bits/stdc++.h>
using namespace std;
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(NULL);
int n,m;
cin>>n>>m;
int p;
int time = 0;
if (m>n) p = n;
else p = m;
long int a[n],b[m];
for (int i = 0; i < n; i++)
{
cin>>a[i];
}
sort(a,a+n);
stack <int> s;
stack <int> q;
for (int i = 0; i < n; i++)
{
s.push(a[i]);
}
for (int i = 0; i < m; i++)
{
cin>>b[i];
}
sort(b,b+m);
int i;
// for(int l =1;l<m;l++)
// cout<<b[m];
// while(!s.empty())
// {
// cout<<s.top();
// s.pop();
// }
if(b[m-1]<s.top())
{
cout<<-1;
}
else
{
for (i = 0; i <n; i++)
{
for (int j = 1; j <= m; j++)
{
if(s.empty())
{
break;
}
else if(b[m-j]>=s.top())
{
s.pop();
}
else
{
q.push(s.top());
s.pop();
}
}
time++;
if(s.empty() && q.empty())
{
break;
}
while(!q.empty())
{
s.push(q.top());
q.pop();
}
}
}
cout<<time+i;
}