# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
494482 | ammar2000 | Mountains (NOI20_mountains) | C++17 | 2063 ms | 8148 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include<bits/stdc++.h>
#define ll long long
#define pb push_back
#define F first
#define S second
#define coy cout<<"YES\n"
#define con cout<<"NO\n"
#define co1 cout<<"-1\n"
using namespace std;
const int SI=3e5+7;
ll INF=8e18+7;
int MOD=1e9+7;
ll n,a[SI],ans;
int main()
{
cin>>n;
for (int i=0;i<n;i++)
cin>>a[i];
for (int i=1;i<n-1;i++)
{
ll f,s;
f=s=0;
for (int r=0;r<i;r++)
f+=(a[i]>a[r]);
for(int r=i+1;r<n;r++)
s+=(a[i]>a[r]);
ans+=f*s;
}
cout <<ans;
return 0;
}
Compilation message (stderr)
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