Submission #904652

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
904652	2024-01-12 07:00:16	dsyz	Furniture (JOI20_furniture)	C++17	100 / 100	237 ms	13036 KiB

furniture

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#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define MAXN (1005)
ll N,M;
ll cnt[2 * MAXN];
bool R[MAXN][MAXN];
void del(ll i, ll j){
    if(R[i][j] == 0 || cnt[i + j] == 1) return;
    cnt[i + j]--;
    R[i][j] = 0;
    if(i + 1 < N && (j == 0 || R[i + 1][j - 1] == 0)) del(i + 1,j);
    if(i - 1 >= 0 && (j == M - 1 || R[i - 1][j + 1] == 0)) del(i - 1,j);
    if(j + 1 < M && (i == 0 || R[i - 1][j + 1] == 0)) del(i,j + 1);
    if(j - 1 >= 0 && (i == N - 1 || R[i + 1][j - 1] == 0)) del(i,j - 1);
}
int main() {
  ios_base::sync_with_stdio(false);cin.tie(0);
  cin>>N>>M;
  for(ll i = 0;i < N;i++){
    for(ll j = 0;j < M;j++){
      R[i][j] = 1;
      cnt[i + j]++;
    }
  }
  for(ll i = 0;i < N;i++){
    for(ll j = 0;j < M;j++){
      ll a;
      cin>>a;
      if(a == 1){
 
 
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• Subtask 1: 5 / 5
• Subtask 2: 95 / 95