Submission #684807

#	Time	Username	Problem	Language	Result	Execution time	Memory
684807		US3RN4M3	Vudu (COCI15_vudu)	C++17	140 / 140	576 ms	37656 KiB

vudu

#include<ext/pb_ds/assoc_container.hpp>
#include<bits/stdc++.h>
using namespace std;
using namespace __gnu_pbds;
using ll = long long;
template<int size>
struct st {
	st<size / 2> l, r;
	int val = 0;
	st() {}
	void add(int pos) {
		val++;
		if(pos < size/2) l.add(pos);
		else r.add(pos - size/2);
	}
	int get(int pos) {
		if(pos == size / 2) return l.val;
		else if(pos > size / 2) {
			return l.val + r.get(pos - size / 2);
		} else return l.get(pos);

	}
};
template<>
struct st<1> {
	int val = 0;
	st() {}
	void add(int) {
		val++;
	}
	int get(int) {
		return val;
	}
};
st<1048576> t;
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());
	for(int i = 0; i < n; i++) {
		ans += t.get(vals[i].second);
		t.add(vals[i].second);
	}
	cout << ans << endl;
}

Compilation message (stderr)

vudu.cpp:36:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   36 | main() {
      | ^~~~

• Subtask 1: 140 / 140