Submission #106194

#	Time	Username	Problem	Language	Result	Execution time	Memory
106194		tictaccat	Seats (IOI18_seats)	C++14	11 / 100	4091 ms	48680 KiB

seats

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

using namespace std;

vector<int> R,C;
vector<vector<int>> grid;
int H,W;

int solve_chart(int H, int W) {
  int up = 0, down = H, left = W, right = 0;
  int b = 0;
  for (int k = 1; k <= H*W; k++) {
    up = max(up,R[k-1]);
    down = min(down,R[k-1]);
    left = min(left,C[k-1]);
    right = max(right,C[k-1]);
  //  cout << k << ": " << left << " " << right << " " << down << " " << up;
    if ((right-left+1)*(up-down+1) == k) {
     // cout << " yes";
     // cout << k << "\n";
      b++;
    }
   // cout << "\n";
  }
  return b;
}

void give_initial_chart(int tempH, int tempW, std::vector<int> tempR, std::vector<int> tempC) {
  H = tempH; W = tempW; R = tempR; C = tempC;
  grid.assign(H,vector<int>(W));
  for (int i = 0; i < H*W; i++) grid[tempR[i]][tempC[i]] = i;
}

int swap_seats(int a, int b) {
  swap(grid[R[a]][C[a]], grid[R[b]][C[b]]);
  swap(R[a],R[b]);
  swap(C[a],C[b]);
  return solve_chart(H,W);
// return -1;
}

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