Submission #463727

#	Time	Username	Problem	Language	Result	Execution time	Memory
463727		Hamed5001	Vudu (COCI15_vudu)	C++14	140 / 140	494 ms	19864 KiB

vudu

#include <bits/stdc++.h>

using namespace std;
typedef long long ll;

const int mxN = 1e6+10;
int BIT[mxN], N, P;
vector<ll> A, APR;

void add(int idx, int delta) {
	for (; idx <= N; 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() {
	scanf("%d", &N);
	A.resize(N);
	for (auto& a : A) scanf("%lld", &a);
	scanf("%d", &P);

	ll sum = 0;
	for (auto& a : A) {
		a -= P;
		sum += a;
		APR.push_back(sum);
	}

	sort(APR.begin(), APR.end());
	for (int i = 0; i < N; i++) {
		add(N - i, 1);
	}

	sum = 0;
	ll ans = 0;
	for (auto a : A) {
		ans += query(APR.end() - lower_bound(APR.begin(), APR.end(), sum));
		sum += a;
		add(APR.end() - lower_bound(APR.begin(), APR.end(), sum), -1);
	}
	printf("%lld", ans);
}

int main() {
	solve();
}

Compilation message (stderr)

vudu.cpp: In function 'void solve()':
vudu.cpp:23:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |  scanf("%d", &N);
      |  ~~~~~^~~~~~~~~~
vudu.cpp:25:25: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   25 |  for (auto& a : A) scanf("%lld", &a);
      |                    ~~~~~^~~~~~~~~~~~
vudu.cpp:26:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   26 |  scanf("%d", &P);
      |  ~~~~~^~~~~~~~~~

• Subtask 1: 140 / 140