Submission #544328

#	Time	Username	Problem	Language	Result	Execution time	Memory
544328		sliviu	Jousting tournament (IOI12_tournament)	C++17	100 / 100	48 ms	4652 KiB

tournament

#include <bits/stdc++.h>

using namespace std;

int GetBestPosition(int n, int m, int r, int* k, int* s, int* e) {
	int sol = 0;
	vector<int> bit(n + 2), win(n + 1), link(n + 1), ans(n + 1);
	auto update = [&](int pos, int val) {
		for (++pos; pos <= n + 1; pos += pos & -pos)
			bit[pos] += val;
	};
	auto query = [&](int val) {
		int pos = 0, s = 0;
		for (int i = 31 - __builtin_clz(n + 1); ~i; --i)
			if (pos + (1 << i) < n + 1 && s + bit[pos + (1 << i)] < val)
				pos += 1 << i, s += bit[pos];
		return pos;
	};
	for (int i = 0; i < n; ++i) {
		link[i] = i + 1;
		win[i + 1] = win[i] + (k[i] > r);
		update(i, 1);
	}
	for (int i = 0; i < m; ++i) {
		int l = query(s[i] + 1), r = query(e[i] + 2);
		for (int j = link[l], next; j != r; j = next) {
			update(j, -1);
			next = link[j];
			link[j] = r;
		}
		link[l] = r;
		if (!(win[r - 1] - win[l]))
			++ans[l], --ans[r - 1];
	}
	for (int i = 1; i < n; ++i) {
		ans[i] += ans[i - 1];
		if (ans[i] > ans[sol])
			sol = i;
	}
	return sol;
}

• Subtask 1: 17 / 17
• Subtask 2: 32 / 32
• Subtask 3: 51 / 51