Submission #1015174

#	Time	Username	Problem	Language	Result	Execution time	Memory
1015174		AmirAli_H1	Gondola (IOI14_gondola)	C++17	75 / 100	12 ms	6236 KiB

gondola

// In the name of Allah

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

typedef		long long int			ll;
typedef		long double				ld;
typedef		pair<int, int>			pii;
typedef		pair<ll, ll>			pll;
typedef		complex<ld>				cld;

#define		all(x)					(x).begin(),(x).end()
#define		len(x)					((ll) (x).size())
#define		F						first
#define		S						second
#define		pb						push_back
#define		sep						' '
#define		endl					'\n'
#define		Mp						make_pair
#define		kill(x)					cout << x << '\n', exit(0)
#define		set_dec(x)				cout << fixed << setprecision(x);
#define		file_io(x,y)			freopen(x, "r", stdin); freopen(y, "w", stdout);
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

const int maxn = 1e6 + 4;
const int mod = 1e9 + 9;
int ind[maxn], val[maxn];

int valid(int n, int a[]) {
	int j = -1, mx = 0;
	fill(ind, ind + maxn, -1);
	for (int i = 0; i < n; i++) {
		a[i]--;
		if (ind[a[i]] != -1) return 0;
		else ind[a[i]] = i;
		if (a[i] > a[mx]) mx = i;
		if (a[i] < n) {
			int k = (i - a[i] + n) % n;
			if (j == -1 || j == k) j = k;
			else return 0;
		}
	}
	return 1;
}

int replacement(int n, int a[], int res[]) {
	int j = -1, mx = 0;
	fill(ind, ind + maxn, -1);
	for (int i = 0; i < n; i++) {
		a[i]--;
		if (ind[a[i]] != -1) return 0;
		else ind[a[i]] = i;
		if (a[i] > a[mx]) mx = i;
		if (a[i] < n) {
			int k = (i - a[i] + n) % n;
			if (j == -1 || j == k) j = k;
			else return 0;
		}
	}
	if (j == -1) j = 0;
	
	for (int i = j; i < j + n; i++) val[i % n] = i - j;
	for (int i = n; i <= a[mx]; i++) {
		if (ind[i] != -1) {
			int j = ind[i];
			res[i - n] = val[j] + 1;
			val[j] = i;
		}
		else {
			int j = ind[a[mx]];
			res[i - n] = val[j] + 1;
			val[j] = i;
		}
	}
	return (a[mx] + 1) - n;
}

int countReplacement(int n, int a[]) {
	int j = -1, mx = 0;
	fill(ind, ind + maxn, -1);
	for (int i = 0; i < n; i++) {
		a[i]--;
		if (ind[a[i]] != -1) return 0;
		else ind[a[i]] = i;
		if (a[i] > a[mx]) mx = i;
		if (a[i] < n) {
			int k = (i - a[i] + n) % n;
			if (j == -1 || j == k) j = k;
			else return 0;
		}
	}
	
	ll ans = 1, R = 0;
	for (int i = 0; i < n; i++) {
		if (ind[i] == -1) R++;
	}
	for (int i = n; i <= a[mx]; i++) {
		if (ind[i] == -1) {
			ans *= R; ans %= mod;
		}
		else R--;
	}
	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