Submission #790346

#	Time	Username	Problem	Language	Result	Execution time	Memory
790346		pavement	Type Printer (IOI08_printer)	C++17	100 / 100	577 ms	98068 KiB

printer

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
#define int long long
#define mp make_pair
#define mt make_tuple
#define pb push_back
#define ppb pop_back
#define eb emplace_back
#define g0(a) get<0>(a)
#define g1(a) get<1>(a)
#define g2(a) get<2>(a)
#define g3(a) get<3>(a)
#define g4(a) get<4>(a)
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
using db = double;
using ll = long long;
using ld = long double;
using ii = pair<int, int>;
using iii = tuple<int, int, int>;
using iiii = tuple<int, int, int, int>;
using iiiii = tuple<int, int, int, int, int>;
template<class key, class value = null_type, class cmp = less<key> >
using ordered_set = tree<key, value, cmp, rb_tree_tag, tree_order_statistics_node_update>;

int N, max_idx;
string cur, max_str, a[25005], ord[25005];
vector<char> ins;
map<string, set<ii> > ss;

main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	cin >> N;
	for (int i = 1; i <= N; i++) {
		cin >> a[i];
		if (a[i].size() > max_str.size()) {
			max_str = a[i];
			max_idx = i;
		}
		for (int j = 0; j <= (int)a[i].size(); j++) {
			ss[a[i].substr(0, j)].emplace(a[i].size(), i);
		}
	}
	for (int i = 1, idx = max_idx; i <= N; i++) {
		ord[N - i + 1] = a[idx];
		// remove idx
		for (int j = 0; j <= (int)a[idx].size(); j++) {
			ss[a[idx].substr(0, j)].erase(mp(a[idx].size(), idx));
		}
		if (i + 1 > N) continue;
		int to = -1;
		for (int j = (int)a[idx].size(); j >= 0; j--) {
			if (!ss[a[idx].substr(0, j)].empty()) {
				to = ss[a[idx].substr(0, j)].begin()->second;
				break;
			}
		}
		idx = to;
	}
	for (int i = 1; i <= N; i++) {
		for (int j = (int)cur.size(); j < (int)ord[i].size(); j++) {
			ins.pb(ord[i][j]);
		}
		cur = ord[i];
		ins.pb('P');
		if (i + 1 <= N) {
			while (!cur.empty() && ord[i + 1].substr(0, cur.size()) != cur) {
				cur.ppb();
				ins.pb('-');
			}
		}
	}
	cout << ins.size() << '\n';
	for (char c : ins) cout << c << '\n';
}

Compilation message (stderr)

printer.cpp:33:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   33 | main() {
      | ^~~~

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