제출 #380580

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
380580		Aryan_Raina	Vudu (COCI15_vudu)	C++14	42 / 140	1098 ms	59116 KiB

vudu

#include <bits/stdc++.h>
using namespace std;

#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
typedef tree<int, null_type, less_equal<int>, rb_tree_tag, tree_order_statistics_node_update> oset;
 
#define int long long
#define ld long double
#define ar array

const int INF = 1e17;
const int MOD = 1e9;

int32_t main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n; cin>>n;
    vector<int> a(n);
    for (int &i : a) cin>>i;
    oset s; s.insert(0);
    int p; cin>>p; int psum = 0;
    int ans = 0;
    for (int i = 0; i < n; i++) {
        psum += a[i];
        int diff = psum - (i+1)*p;
        ans += s.order_of_key(diff+1);
        s.insert(diff);
    }
    cout<<ans<<"\n";
}

• Subtask 1: 42 / 140