Submission #684804

#	Time	Username	Problem	Language	Result	Execution time	Memory
684804		US3RN4M3	Vudu (COCI15_vudu)	C++17	126 / 140	988 ms	65536 KiB

vudu

#include<ext/pb_ds/assoc_container.hpp>
#include<bits/stdc++.h>
using namespace std;
using namespace __gnu_pbds;
using ll = long long;
typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> ost;

main() {
	int n; cin >> n;
	vector<int> nums(n);
	for(int & i : nums) cin >> i;
	ll p; cin >> p;
	vector<pair<ll, int>> vals(n);
	ll sum = 0;
	ll ans = 0;
	for(int i = 0; i < n; i++) {
		sum += nums[i];
		ll goal = p*(i + 1);
		vals[i] = {sum - goal, i};
		if(sum >= goal) ans++;
	}
	sort(vals.begin(), vals.end());
	ost t;
	for(int i = 0; i < n; i++) {
		ans += t.order_of_key(vals[i].second);
		t.insert(vals[i].second);
	}
	cout << ans << endl;
}

Compilation message (stderr)

vudu.cpp:8:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    8 | main() {
      | ^~~~

• Subtask 1: 126 / 140