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A.cpp
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64 lines (61 loc) · 1.13 KB
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#include<iostream>
using namespace std;
string ticket(long long n,long long a[])
{
long long c=0,cc=0;
for(int i=0;i<n;i++)
{
if(a[i]==25)
{
c+=1;
continue;
}
int change;
if(a[i]==50)
{
//change=1;
if(c>=1)
{
c=c-1;
cc++;
continue;
}
else
{
return "NO";
}
}
if(a[i]==100)
{
//change=3;
if(c>=3 ||(c>=1 && cc>=1))
{
if(cc>=1)
{
cc--;
c--;
}
else
{
c=c-3;
}
continue;
}
else
{
return "NO";
}
}
}
return "YES";
}
int main()
{
long long n;
cin>>n;
long long a[n];
for(int i=0;i<n;i++)
cin>>a[i];
cout<<ticket(n,a);
return 0;
}