Submission #462602

#	Time	Username	Problem	Language	Result	Execution time	Memory
462602		Hamed5001	Vudu (COCI15_vudu)	C++14	0 / 140	1100 ms	58996 KiB

vudu

#include <bits/stdc++.h>

using namespace std;
typedef long long ll;

map<int, int> ID;
int id = 1;
const int mxN = 1e6+100;
int BIT[mxN];

void add(int idx, int delta) {
	for (; idx < id; idx += idx & -idx)
		BIT[idx] += delta;
}

int query(int idx) {
	int ret = 0;
	for (; idx > 0; idx -= idx & -idx)
		ret += BIT[idx];
	return ret;
}

void solve() {
	int N, P;
	cin >> N;
	vector<int> A(N); for (auto& a : A) cin >> a;
	cin >> P;
	for (auto& a : A) a-=P;

	vector<int> AA;

	int sum = 0;
	for (auto a : A) {
		sum += a;
		AA.push_back(sum);
	}

	sort(AA.rbegin(), AA.rend());

	ID[0] = id++;
	for (int i = 0; i < AA.size(); ++i) {
		if (!ID[AA[i]]) 
			ID[AA[i]] = id++;
	}

	for (auto aa : AA) {
		add(ID[aa], 1);
	}
	// cout << query(3) << endl;
	// for (auto& [a, b] : ID) {
	// 	cout << a << ' ' << b << endl;
	// }

	sum = 0;
	ll ans = 0;
	for (auto a : A) {
		int sumid = ID[sum];
		ans += query(sumid);
		sum += a;
		add(sumid, -1);
	}

	cout << ans;
}

int main() {

	
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	solve();
}

Compilation message (stderr)

vudu.cpp: In function 'void solve()':
vudu.cpp:41:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |  for (int i = 0; i < AA.size(); ++i) {
      |                  ~~^~~~~~~~~~~

• Subtask 1: 0 / 140