Submission #792888

#	Time	Username	Problem	Language	Result	Execution time	Memory
792888		NothingXD	Seats (IOI18_seats)	C++17	17 / 100	4038 ms	56368 KiB

seats

#include "seats.h"
#include <bits/stdc++.h>

using namespace std;

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

void debug_out(){cerr << endl;}

template<typename Head, typename... Tail>
void debug_out(Head H, Tail... T){
	cerr << H << ' ';
	debug_out(T...);
}

#define debug(...) cerr << "(" << #__VA_ARGS__ << "): ", debug_out(__VA_ARGS__)
#define F first
#define S second
#define all(x) x.begin(), x.end()
#define MP(x, y) make_pair(x, y)

const int maxn = 1e6 + 10;
const int inf = 1e9;

int n, r[maxn], c[maxn], val[maxn][4];
bool mark[maxn];
int ans = 0;
void give_initial_chart(int H, int W, std::vector<int> R, std::vector<int> C) {
	n = H*W;
	for (int i = 1; i <= n; i++){
		r[i] = R[i-1];
		c[i] = C[i-1];
	}
	val[0][0] = val[0][2] = inf;
	val[0][1] = val[0][3] = 0;
	for (int i = 1; i <= n; i++){
		val[i][0] = min(val[i-1][0], r[i]);
		val[i][1] = max(val[i-1][1], r[i]);
		val[i][2] = min(val[i-1][2], c[i]);
		val[i][3] = max(val[i-1][3], c[i]);
		//debug(i, val[i][0], val[i][1], val[i][2], val[i][3]);
		if (1ll * (val[i][1] - val[i][0] + 1) * (val[i][3] - val[i][2] + 1) == i){
			ans++;
			mark[i] = true;
		}
	}
}

int swap_seats(int a, int b) {
	a++, b++;
	if (a > b) swap(a, b);
	swap(r[a], r[b]);
	swap(c[a], c[b]);
	for (int i = a; i <= b; i++){
		if (mark[i]) ans--;
		mark[i] = false;
		val[i][0] = min(val[i-1][0], r[i]);
		val[i][1] = max(val[i-1][1], r[i]);
		val[i][2] = min(val[i-1][2], c[i]);
		val[i][3] = max(val[i-1][3], c[i]);
		if (1ll * (val[i][1] - val[i][0] + 1) * (val[i][3] - val[i][2] + 1) == i){
			ans++;
			mark[i] = true;
		}
	}
	return ans;
}

• Subtask 1: 5 / 5
• Subtask 2: 6 / 6
• Subtask 3: 0 / 20
• Subtask 4: 6 / 6
• Subtask 5: 0 / 33
• Subtask 6: 0 / 30