제출 #1108155

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1108155		Tsagana	Weighting stones (IZhO11_stones)	C++14	0 / 100	2 ms	336 KiB

stones

#include<bits/stdc++.h>

#define IOS ios_base::sync_with_stdio(false);cin.tie();cout.tie();
#define all(x) x.begin(), x.end()
#define lnl long long
#define pq priority_queue
#define eb emplace_back
#define lb lower_bound
#define ub upper_bound
#define pb push_back
#define pp pop_back
#define F first
#define S second

using namespace std;

pair<int, int> mn = {INT_MAX, 0};
pair<int, int> mx = {0, 0};
set<int> s;
int id[100001];
int sd[3];

void add(int x, int i) {
	if (mn.F > x) mn = {x, i};
	if (mx.F < x) mx = {x, i};

	s.insert(-x);
	id[x] = i;
	sd[i]++;
}
char find() {
	if (sd[1] == 0) return '<';
	if (sd[2] == 0) return '>';
	if (mn.S == mx.S) return '?';

	int l = mx.S;
	int k = 1;

	auto it = s.ub(-mx.S);
	while (it != s.end()) {
		int x = -*it;
		int i = id[x];
		if (i == l) k++;
		else k--;

		if (k < 0) return '?';
	}
	return (l == 1 ? '>' : '<');
}
void solve () {
	int n; cin >> n;
	for (int i = 0; i < n; i++) {
		int x, y; cin >> x >> y;
		add(x, y);
		cout << find() << '\n';
	}
}
signed main() {
	IOS 
	#ifndef LOCAL
		freopen("stones.in", "r", stdin);
		freopen("stones.out", "w", stdout);
	#endif

	solve();
	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

stones.cpp: In function 'int main()':
stones.cpp:61:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   61 |   freopen("stones.in", "r", stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
stones.cpp:62:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   62 |   freopen("stones.out", "w", stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 100