제출 #321685

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
321685		Kevin_Zhang_TW	Semiexpress (JOI17_semiexpress)	C++17	48 / 100	1 ms	364 KiB

semiexpress

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define AI(i) begin(i), end(i)
#define pb emplace_back
#ifdef KEV
#define DE(args...) kout("[ " + string(#args) + " ] = ", args)
void kout() { cerr << endl; }
template <class T, class ...U> 
void kout(T a, U ...b) { cerr << a << ' ', kout(b...); }
template <class T>
void debug(T l, T r) { while (l != r) cerr << *l << " \n"[next(l) == r], ++l; }
#else
#define DE(...) 0
#define debug(...) 0
#endif

template <class T>
bool chmin(T &a, T b) { return b < a ? (a = b, true) : false; }
template <class T>
bool chmax(T &a, T b) { return a < b ? (a = b, true) : false; }

#define int ll
const int MAX_N = 3010;
int n, m, k;
ll a, b, c, T;
ll s[MAX_N];
int solve() {
	int ad = k - m, res = 0;

	vector<int> obj;

	assert(a > c && c > b);
	vector<int> all;

	for (int i = 1;i <= m;++i) {
		ll et = (s[i] - 1) * b;

		if (et > T) break;

		if (i == m) {
			++res;
			break;
		}
		int id = s[i];
		ll ex = (T - et) / a;
		if (id + ex >= s[i+1] - 1) {
			res += s[i+1] - s[i];
			continue;
		}
		res += ex + 1;
		id += ex + 1;
		et += c * (ex + 1);

		while ( ad && id < s[i+1] ) {

			if (et > T) break;

			ll ex = (T - et) / a;

			if (id + ex < s[i+1]) {
				while (obj.size() && obj.back() > ex + 1)
					--ad, res += obj.back(), obj.pop_back();
				if (ad == 0) break;
				--ad;
				res += ex + 1;
				id += ex + 1;
				et += c * (ex + 1);
				all.pb(ex + 1);
			}
			else {
				obj.pb( s[i+1] - id );
				assert(s[i+1] > id);
				assert(all.empty() || obj.back() <= all.back());
				break;
			}
		}
		sort(AI(obj));
	}
	assert(ad >= 0);
	for (int i = 1;i < all.size();++i)
		assert(all[i] <= all[i-1]);

	sort(AI(obj), greater<>());

	chmin(ad, (int)obj.size());

	for (int i = 0;i < ad;++i)
		res += obj[i];

	assert(res <= n);
	assert(res >= 1);
	return res - 1;
}
int32_t main() {
	ios_base::sync_with_stdio(0), cin.tie(0);
	cin >> n >> m >> k >> a >> b >> c >> T;
	for (int i = 1;i <= m;++i)
		cin >> s[i];
	cout << solve() << '\n';
}

컴파일 시 표준 에러 (stderr) 메시지

semiexpress.cpp: In function 'll solve()':
semiexpress.cpp:81:19: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   81 |  for (int i = 1;i < all.size();++i)
      |                 ~~^~~~~~~~~~~~

• Subtask 1: 18 / 18
• Subtask 2: 30 / 30
• Subtask 3: 0 / 52