Submission #1188979

#	Time	Username	Problem	Language	Result	Execution time	Memory
1188979		Mamikonm1	The Big Prize (IOI17_prize)	C++20	Compilation error	0 ms	0 KiB

prize

#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;

static const int max_q = 10000;
static int n;
static int query_count = 0;
static vector<int> g;
static vector<vector<int> > rank_count;

vector<int> ask(int i) {
	query_count++;
	if (query_count > max_q) {
		cerr << "Query limit exceeded" << endl;
		exit(0);
	}

	if (i < 0 || i >= n) {
		cerr << "Bad index: " << i << endl;
		exit(0);
	}

	vector<int> res(2);
	res[0] = rank_count[g[i] - 1][i + 1];
	res[1] = rank_count[g[i] - 1][n] - res[0];
	return res;
}

int find_best(int n) {
	int l = 1, r = n + 1, md, ans = -1;
	while (l + 1 < r) {
		md = r + l >> 1;
		vector<int>cur = ask(md);
		if (cur[0])
			r = md;
		else if (cur[0])
			l = md;
		else {
			ans = md;
			break;
		}
	}
	return ans;
}

int main() {
	cin >> n;

	g.resize(n);
	for (int i = 0; i < n; i++) {
		cin >> g[i];
		if (g[i] < 1) {
			cerr << "Invalid rank " << g[i] << " at index " << i << endl;
			exit(0);
		}
	}

	int max_rank = *max_element(g.begin(), g.end());

	rank_count.resize(max_rank + 1, vector<int>(n + 1, 0));
	for (int r = 0; r <= max_rank; r++) {
		for (int i = 1; i <= n; i++) {
			rank_count[r][i] = rank_count[r][i - 1];
			if (g[i - 1] == r)
				rank_count[r][i]++;
		}
	}

	for (int i = 0; i <= n; i++)
		for (int r = 1; r <= max_rank; r++)
			rank_count[r][i] += rank_count[r - 1][i];

	int res = find_best(n);
	cout << res << endl << "Query count: " << query_count << endl;

	return 0;
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccd1Pzr3.o: in function `ask(int)':
grader.cpp:(.text+0x80): multiple definition of `ask(int)'; /tmp/ccg57SRc.o:prize.cpp:(.text+0x0): first defined here
/usr/bin/ld: /tmp/ccd1Pzr3.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccg57SRc.o:prize.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status