제출 #331337

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
331337		Nson	Potatoes and fertilizers (LMIO19_bulves)	C++14	0 / 100	18 ms	748 KiB

bulves

#include <bits/stdc++.h>

using namespace std;
using ll = long long;

int main() {
	int n;
	scanf("%d", &n);

	multiset<ll> s;

	ll m = 0, b = 0;

	s.insert(0);

	auto can_rem = [&]() {
		if(s.empty()) return false;
		if(m <= 0) return false;
		if(*prev(s.end()) < 0) return false;
		if(*prev(s.end()) > 0) return true;
		if((int)s.size() >= 2 and *prev(prev(s.end())) >= 0) return true;
		return false;
	};

	auto smooth = [&]() {
		while(can_rem()) {
			m--;
			b += *prev(s.end());
			s.erase(prev(s.end()));
		}
	};

	ll d = 0;
	for(int i = 0; i < n; i++) {
		int aa, bb;
		scanf("%d %d", &aa, &bb);
		aa -= bb;
		d += aa;

		smooth();
		if(d >= 0) {
			s.insert(d);
			s.insert(d);
			b -= d;
			m += 1;
		}
		else {
			m += 1;
			b -= d;
		}
		// while(!s.empty() and *s.begin() < 0) s.erase(s.begin());
	}

	smooth();

	printf("%lld\n", d * m + b);

}

컴파일 시 표준 에러 (stderr) 메시지

bulves.cpp: In function 'int main()':
bulves.cpp:8:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    8 |  scanf("%d", &n);
      |  ~~~~~^~~~~~~~~~
bulves.cpp:36:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   36 |   scanf("%d %d", &aa, &bb);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 24
• Subtask 2: 0 / 10
• Subtask 3: 0 / 20
• Subtask 4: 0 / 10
• Subtask 5: 0 / 36