제출 #490720

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
490720		ntabc05101	Hiring (IOI09_hiring)	C++14	100 / 100	295 ms	15288 KiB

hiring

#include<bits/stdc++.h>
using namespace std;

#define taskname ""

int main() {
	if (fopen(taskname".inp", "r")) {
		freopen(taskname".inp", "r", stdin);
		freopen(taskname".out", "w", stdout);
	}
	else {
		if (fopen(taskname".in", "r")) {
			freopen(taskname".in", "r", stdin);
			freopen(taskname".out", "w", stdout);
		}
	}

	cin.tie(0)->sync_with_stdio(0);

	int n; long long w; cin >> n >> w;
	struct Sal {
		int s, q; double r;
		int idx;
		bool operator < (const Sal &other) {
			return r < other.r;
		}
	};
	Sal a[n];
	for (int i = 0; i < n; i++) {
		cin >> a[i].s >> a[i].q;
		a[i].r = 1. * a[i].s / a[i].q;
		a[i].idx = i;
	}

	sort(a, a + n);
	long long cur = 0;
	priority_queue< array<int, 2> > pq;
	pair<int, double> res = {0, -w};
	int j = -1;
	for (int i = 0; i < n; i++) {
		pq.push({a[i].q, 0});
		cur += a[i].q;
		while (a[i].r * cur > w) {
			cur -= pq.top()[0]; pq.pop();
		}
		if (res < make_pair((int)pq.size(), -a[i].r * cur)) {
			res = {pq.size(), -a[i].r * cur}; j = i;
		}
	}

	cout << res.first << "\n";
	while (!pq.empty()) {
		pq.pop();
	}
	cur = 0;
	for (int i = 0; i <= j; i++) {
		pq.push({a[i].q, a[i].idx});
		cur += a[i].q;
		while (a[i].r * cur > w) {
			cur -= pq.top()[0]; pq.pop();
		}
	}
	while (!pq.empty()) {
		cout << 1 + pq.top()[1] << "\n"; pq.pop();
	}

	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

hiring.cpp: In function 'int main()':
hiring.cpp:8:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    8 |   freopen(taskname".inp", "r", stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
hiring.cpp:9:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    9 |   freopen(taskname".out", "w", stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
hiring.cpp:13:11: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |    freopen(taskname".in", "r", stdin);
      |    ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
hiring.cpp:14:11: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |    freopen(taskname".out", "w", stdout);
      |    ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 30 / 30
• Subtask 2: 28 / 28
• Subtask 3: 6 / 6
• Subtask 4: 6 / 6
• Subtask 5: 6 / 6
• Subtask 6: 6 / 6
• Subtask 7: 6 / 6
• Subtask 8: 6 / 6
• Subtask 9: 6 / 6