Submission #1014971

#	Time	Username	Problem	Language	Result	Execution time	Memory
1014971		hyakup	Seats (IOI18_seats)	C++17	17 / 100	4059 ms	60468 KiB

seats

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

const int maxn = 1e6 + 10;

vector<int> l1(maxn, maxn), l2(maxn, -maxn), c1(maxn, maxn), c2(maxn, -maxn), marc(maxn);
vector<int> i, j;
int n, m;
int resp;

void give_initial_chart(int H, int W, vector<int> R, vector<int> C) {
  i = R; j = C;
  n = H, m = W;
  for( int k = 1; k <= H*W; k++ ){
    l1[k] = min(l1[k - 1], i[k - 1] );
    l2[k] = max(l2[k - 1], i[k - 1] );
    c1[k] = min(c1[k - 1], j[k - 1] );
    c2[k] = max(c2[k - 1], j[k - 1] );
    if( (l2[k] - l1[k] + 1)*(c2[k] - c1[k] + 1) == k ){ marc[k] = 1; resp++; }
  }
}

int swap_seats(int a, int b) {
  swap( i[a], i[b] ); swap( j[a], j[b] );
  for( int k = min(a, b) + 1; k <= max(a, b) + 1; k++ ){
    if( marc[k] ){ marc[k] = 0; resp--; }
    l1[k] = min(l1[k - 1], i[k - 1] );
    l2[k] = max(l2[k - 1], i[k - 1] );
    c1[k] = min(c1[k - 1], j[k - 1] );
    c2[k] = max(c2[k - 1], j[k - 1] );
    if( (l2[k] - l1[k] + 1)*(c2[k] - c1[k] + 1) == k ){ marc[k] = 1; resp++; }
  }
  return resp;
}

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