제출 #547045

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
547045		mgl_diamond	Balloons (CEOI11_bal)	C++14	30 / 100	2032 ms	1656 KiB

bal

#include <bits/stdc++.h>

using namespace std;
using ll = long long;
using ld = long double;

#define ii pair<int, int>
#define dd pair<ld, ld>
#define iii pair<int, ii>
#define fi first
#define se second

#define all(x) (x).begin(), (x).end()
#define debug(x) cout << "> " << #x << ": " << x << '\n'

template<class T> bool maximize(T&a, T b) { if (a<b) return a=b, 1; return 0; }
template<class T> bool minimize(T&a, T b) { if (a>b) return a=b, 1; return 0; }

void setIO(string name="") {
	ios::sync_with_stdio(0); cin.tie(0);
	if (name.size()) freopen((name+".in").c_str(), "r", stdin);
	if (name.size()) freopen((name+".out").c_str(), "w", stdout);
}

int n;
vector<dd> st;

int main() {
	cin >> n;
	for(int i=0; i<n; ++i) {
		ld x, r; cin >> x >> r;
		for(int i=st.size()-1; i>=0; --i) {
			ld x1=st[i].fi;
			ld r1=st[i].se;
			minimize(r, (x1-x)*(x1-x)/(r1*4));
		}
		while (st.size() && st.back().se<r) st.pop_back();
		st.push_back({x, r});
		cout << r << "\n";
	}
}

컴파일 시 표준 에러 (stderr) 메시지

bal.cpp: In function 'void setIO(std::string)':
bal.cpp:21:26: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |  if (name.size()) freopen((name+".in").c_str(), "r", stdin);
      |                   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
bal.cpp:22:26: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |  if (name.size()) freopen((name+".out").c_str(), "w", stdout);
      |                   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 0 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10