Submission #623669

#	Time	Username	Problem	Language	Result	Execution time	Memory
623669		MateGiorbelidze	Seats (IOI18_seats)	C++14	0 / 100	4027 ms	45620 KiB

seats

#include "seats.h"
#include <bits/stdc++.h>
using namespace std;
#define ll long long

std::vector<int> r , c , mxr, mxc, mnr, mnc;

ll ans = 0 , h , w;


void give_initial_chart(int H, int W, std::vector<int> R, std::vector<int> C) {
  r = R; c = C; h = H; w = W;
  
  mxr.resize( h * w + 1 );
  mxc.resize( h * w + 1 );
  mnr.resize( h * w + 1 );
  mnc.resize( h * w + 1 );
  
  mxr[0] = mxc[0] = INT_MIN;
  mnr[0] = mnc[0] = INT_MAX;
  
  for (int i = 1; i <= h * w; i++) {
  	
      mxr[i] = max(mxr[i - 1] , r[i - 1]);
      mxc[i] = max(mxc[i - 1] , c[i - 1]);
      mnr[i] = min(mnr[i - 1] , r[i - 1]);
      mnc[i] = min(mxc[i - 1] , c[i - 1]);
      
      if ( (mxr[i] - mnr[i] + 1) * (mxc[i] - mnc[i] + 1) == i) ans++;
  }
  
}

int swap_seats(int a, int b) {
	a++; b++;
	if (a > b) swap(a , b);
	
	 for (int i = a; i <= b; i++) 
      if ( (mxr[i] - mnr[i] + 1) * (mxc[i] - mnc[i] + 1) == i) ans--;
    
	swap (r[a - 1] , r[b - 1]);
	swap (c[a - 1] , c[b - 1]);  
      
    for (int i = a; i <= b; i++) {
  	
      mxr[i] = max(mxr[i - 1] , r[i - 1]);
      mxc[i] = max(mxc[i - 1] , c[i - 1]);
      mnr[i] = min(mnr[i - 1] , r[i - 1]);
      mnc[i] = min(mxc[i - 1] , c[i - 1]);
      
      if ( (mxr[i] - mnr[i] + 1) * (mxc[i] - mnc[i] + 1) == i) ans++;
  }  
  
	
  return ans;
}

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