Submission #156843

#	Time	Username	Problem	Language	Result	Execution time	Memory
156843		staniewzki	Semiexpress (JOI17_semiexpress)	C++14	100 / 100	25 ms	4592 KiB

semiexpress

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

ostream& operator<<(ostream &out, string str) {
	for(char c : str) out << c;
	return out;
}
 
template<class L, class R> ostream& operator<<(ostream &out, pair<L, R> p) {
	return out << "(" << p.first << ", " << p.second << ")";
}
 
template<class T> auto operator<<(ostream &out, T a) -> decltype(a.begin(), out) {
	out << "{";
	for(auto it = a.begin(); it != a.end(); it = next(it))
		out << (it != a.begin() ? ", " : "") << *it;
	return out << "}";
}
 
void dump() { cerr << "\n"; }
template<class T, class... Ts> void dump(T a, Ts... x) {
	cerr << a << ", ";
	dump(x...);
}
 
#ifdef DEBUG
#  define debug(...) cerr << "[" #__VA_ARGS__ "]: ", dump(__VA_ARGS__)
#else
#  define debug(...) false
#endif
 
#define REP(i, n) for(int i = 0; i < n; i++)
#define FOR(i, a, b) for(int i = a; i <= b; i++)
#define ST first
#define ND second
 
template<class T> int size(T && a) { return a.size(); }

using LL = long long;
using PII = pair<int, int>;

int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);

	int n, m, k;
	LL a, b, c, t;
	cin >> n >> m >> k >> a >> b >> c >> t;
	vector<LL> s(m);
	k -= m;
	REP(i, m) cin >> s[i];
	s.emplace_back(n + 1);

	LL f = min(a, min(b, c));
	debug(f);
	LL ans = -1;
	vector<LL> best;
	REP(i, m) {
		LL time_elapsed = f * (s[i] - 1);
		debug(i, s[i], time_elapsed);
		if(time_elapsed > t) break;
		LL pos = s[i] + (t - time_elapsed) / a;
		pos = min(pos, s[i + 1] - 1);
		ans += pos - s[i] + 1;
		debug(i, s[i], pos, ans);
		REP(j, k) {
			LL last = pos;
			pos++;
			if(pos >= s[i + 1]) break;
			time_elapsed = f * (s[i] - 1) + (pos - s[i]) * c;
			debug(pos, time_elapsed);
			if(time_elapsed > t) break;
			pos += (t - time_elapsed) / a;
			pos = min(pos, s[i + 1] - 1);
			debug(pos, last);
			best.emplace_back(pos - last);
		}
	}

	debug(best);
	sort(best.rbegin(), best.rend());
	REP(i, min(k, size(best)))
		ans += best[i];
	cout << ans << "\n";
}

Compilation message (stderr)

semiexpress.cpp: In function 'int main()':
semiexpress.cpp:55:10: warning: statement has no effect [-Wunused-value]
  debug(f);
          ^
semiexpress.cpp:60:31: warning: statement has no effect [-Wunused-value]
   debug(i, s[i], time_elapsed);
                               ^
semiexpress.cpp:65:27: warning: statement has no effect [-Wunused-value]
   debug(i, s[i], pos, ans);
                           ^
semiexpress.cpp:71:28: warning: statement has no effect [-Wunused-value]
    debug(pos, time_elapsed);
                            ^
semiexpress.cpp:75:20: warning: statement has no effect [-Wunused-value]
    debug(pos, last);
                    ^
semiexpress.cpp:80:13: warning: statement has no effect [-Wunused-value]
  debug(best);
             ^

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