#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp> // Common file
#include <ext/pb_ds/tree_policy.hpp> // Including tree_order_statistics_node_update#define eps 1e-9
#define MOD1 998244353
#define MOD2 1000000007
#define INV_10 299473306
#define INF 1000000001
#define PI 3.14159265358979323846
#define ordered_set tree<pair<long long, int>, null_type,less<pair<long long, int> >, rb_tree_tag,tree_order_statistics_node_update>
using namespace std;
using namespace __gnu_pbds;
int main()
{
ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
int n;
cin >> n;
int a[n];
ordered_set s;
//cout << n << '\n';
for(int i = 0; i < n; i++)
cin >> a[i];
long long p;
cin >> p;
long long sum=0, cu=0, ans=0;
for(int i = n-1; i >= 0; i--)
{
sum+=a[i];
s.insert(make_pair(here[i], i));
//cout << here[i] << ' ';
cu+=p;
}
//cout << '\n';
cu=0;
long long pr=0;
for(int i = n-1; i >= 0; i--)
{
if(s.lower_bound(make_pair(p+pr-cu, -1))!=s.end())
ans+=i+1-s.order_of_key(*s.lower_bound(make_pair(p+pr-cu, -1)));
//cout << s.order_of_key(*s.lower_bound(make_pair(p+pr-cu, -1))) << '\n';
pr+=a[i];
s.erase(make_pair(pr-cu, i));
cu+=p;
}
cout << ans << '\n';
}
Compilation message
vudu.cpp: In function 'int main()':
vudu.cpp:28:22: error: 'here' was not declared in this scope
s.insert(make_pair(here[i], i));
^~~~
vudu.cpp:28:22: note: suggested alternative: 'erf'
s.insert(make_pair(here[i], i));
^~~~
erf
