Submission #294193

#	Time	Username	Problem	Language	Result	Execution time	Memory
294193		Saboon	Seats (IOI18_seats)	C++17	17 / 100	4083 ms	45304 KiB

seats

#include <bits/stdc++.h>
using namespace std;
const int maxn = 1e6 + 10;
int n, h, w;
vector<int> r, c;

int MxC[4*maxn], MxR[4*maxn], MnC[4*maxn], MnR[4*maxn];
int Now = 0;

bool isGood(int idx){
	int r1 = MnR[idx], r2 = MxR[idx], c1 = MnC[idx], c2 = MxC[idx];
	int Size = (r2-r1+1) * (c2-c1+1);
	if (Size == idx+1)
		return true;
	return false;
}

void give_initial_chart(int H, int W, vector<int> R, vector<int> C){
	h = H, w = W, r = R, c = C;
	n = h*w;
	for (int i = 0; i < n; i++){
		MxC[i] = (i == 0 ? C[i] : max(MxC[i-1],C[i]));
		MnC[i] = (i == 0 ? C[i] : min(MnC[i-1],C[i]));
		MxR[i] = (i == 0 ? R[i] : max(MxR[i-1],R[i]));
		MnR[i] = (i == 0 ? R[i] : min(MnR[i-1],R[i]));
		Now += isGood(i);
	}
}



int swap_seats(int a, int b){
	if (a > b)
		swap(a,b);
	swap(r[a],r[b]);
	swap(c[a],c[b]);
	for (int i = a; i < b; i++){
		Now -= isGood(i);
		MxC[i] = (i == 0 ? c[i] : max(MxC[i-1],c[i]));
		MnC[i] = (i == 0 ? c[i] : min(MnC[i-1],c[i]));
		MxR[i] = (i == 0 ? r[i] : max(MxR[i-1],r[i]));
		MnR[i] = (i == 0 ? r[i] : min(MnR[i-1],r[i]));
		Now += isGood(i);
	}
	return Now;
}

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