Submission #12849

#	Time	Username	Problem	Language	Result	Execution time	Memory
12849		yongwhan	토마토 (KOI13_tomato)	C++98	0 / 16	44 ms	2652 KiB

tomato

#include<algorithm>
#include<iostream>
#include<queue>
#include<utility>
using namespace std;

typedef pair<int,int> ii;

int main() {
 ios_base::sync_with_stdio(false); cin.tie(NULL);
 int m,n; cin>>m>>n;
 bool vis[n][m];
 for (int i=0; i<n; i++) for (int j=0; j<m; j++) cin>>vis[i][j];

 queue<ii> q;
 for (int i=0; i<n; i++) for (int j=0; j<m; j++)
  if(vis[i][j]) q.push(make_pair(i,j));

 int ret=0;
 while(!q.empty()) {
  int sz=q.size();
  bool updated=false;
  while(sz--) {
   ii cur=q.front(); q.pop();
   for (int di=-1; di<=1; di++) for (int dj=-1; dj<=1; dj++) if(abs(di)+abs(dj)==1) {
    ii nxt=cur; nxt.first+=di; nxt.second+=dj;
    if(0<=nxt.first && nxt.first<n && 0<=nxt.second && nxt.second<m) {
     if(!vis[nxt.first][nxt.second]) {
      vis[nxt.first][nxt.second]=true; q.push(nxt); updated=true;
     }
    }
   }
  }
  if(updated) ret++;
 }

 for (int i=0; i<n; i++) for (int j=0; j<m; j++) if(!vis[i][j]) {
  cout << -1 << endl; return 0;
 }

 cout << ret << endl;
 return 0;
}

• Subtask 1: 0 / 1.6
• Subtask 2: 0 / 1.6
• Subtask 3: 0 / 1.6
• Subtask 4: 0 / 1.6
• Subtask 5: 0 / 1.6
• Subtask 6: 0 / 1.6
• Subtask 7: 0 / 1.6
• Subtask 8: 0 / 1.6
• Subtask 9: 0 / 1.6
• Subtask 10: 0 / 1.6