Submission #222742

#	Time	Username	Problem	Language	Result	Execution time	Memory
222742		staniewzki	Gondola (IOI14_gondola)	C++17	75 / 100	24 ms	2272 KiB

gondola

#include<bits/stdc++.h>
using namespace std;
 
#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
 
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.ST << ", " << p.ND << ")";
}
 
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
 
template<class T> int size(T && a) { return (int) a.size(); }
 
using LL = long long;
using PII = pair<int, int>;

#include "gondola.h"

int valid(int n, int inputSeq[]) {
	int origin = -1, mx = -1;
	REP(i, n) {
		mx = max(mx, inputSeq[i]);
		if(inputSeq[i] <= n) {
			int x = (i - inputSeq[i] + n) % n;
			if(origin == -1) origin = x;
			if(origin != x) return false;
		}
	}

	vector<int> used(mx + 1);
	REP(i, n) {
		if(used[inputSeq[i]]) return false;
		used[inputSeq[i]] = true;
	}
	return true;
}

//----------------------

int replacement(int n, int gondolaSeq[], int replacementSeq[]) {
	int origin = -1, mx = -1;
	REP(i, n) {
		mx = max(mx, gondolaSeq[i]);
		if(gondolaSeq[i] <= n && origin == -1)
			origin = (i - gondolaSeq[i] + n) % n;
	}

	vector<int> pos(mx + 1, -1);
	REP(i, n) pos[gondolaSeq[i]] = i;

	vector<int> Q;
	int cur = 0;
	FOR(i, n + 1, mx) {
		Q.emplace_back(i);
		if(pos[i] != -1) {
			int last = (pos[i] - origin + n) % n;
			if(last == 0) last = n;
			for(int x : Q) {
				replacementSeq[cur++] = last;
				last = x;
			}
			Q.clear();
		}
	}

	return cur;
}

//----------------------

int countReplacement(int n, int inputSeq[]) {
	int origin = -1;
	REP(i, n) {
		if(inputSeq[i] <= n) {
			int x = (i - inputSeq[i] + n) % n;
			if(origin == -1) origin = x;
			if(origin != x) return false;
		}
	}

	vector<int> p = {n};
	REP(i, n) {
		if(inputSeq[i] > n) 
			p.emplace_back(inputSeq[i]);
	}

	sort(p.rbegin(), p.rend());

	const int mod = 1e9 + 9;
	int ans = 1, suff = 0;

	function<int(int, int)> qpow = [&](int a, int x) -> int {
		if(x == 0) return 1;
		if(x % 2 == 1) return (LL) qpow(a, x - 1) * a % mod;
		return qpow((LL) a * a % mod, x / 2);
	};

	REP(i, size(p) - 1) {
		int len = p[i] - p[i + 1] - 1;
		if(len == -1) return false;
		ans = (LL) ans * qpow(++suff, len) % mod;
	}

	return ans;
}

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 10 / 10
• Subtask 4: 5 / 5
• Subtask 5: 10 / 10
• Subtask 6: 20 / 20
• Subtask 7: 5 / 5
• Subtask 8: 15 / 15
• Subtask 9: 0 / 15
• Subtask 10: 0 / 10