Submission #826729

#	Time	Username	Problem	Language	Result	Execution time	Memory
826729		jamezzz	Cell Automaton (JOI23_cell)	C++17	16 / 100	466 ms	127704 KiB

cell

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

#define sf scanf
#define pf printf
typedef pair<int,int> ii;

const int m=4000;

int n,k;
int num[2*m+5];
int grid[m+5][m+5];
int dx[4]={0,1,0,-1},dy[4]={1,0,-1,0};

int main(){
	sf("%d%d",&n,&k);
	memset(grid,-1,sizeof grid);
	queue<ii> q;
	for(int i=0;i<n;++i){
		int x,y;sf("%d%d",&x,&y);
		x+=2000;y+=2000;
		grid[x][y]=0;
		q.push({x,y});
	}
	while(!q.empty()){
		auto[x,y]=q.front();q.pop();
		for(int i=0;i<4;++i){
			int nx=x+dx[i],ny=y+dy[i];
			if(nx<0||ny<0||nx>=m||ny>=m)continue;
			if(grid[nx][ny]!=-1)continue;
			grid[nx][ny]=grid[x][y]+1;
			q.push({nx,ny});
		}
	}
	for(int i=0;i<m;++i){
		for(int j=0;j<m;++j){
			++num[grid[i][j]];
		}
	}
	for(int i=0;i<k;++i){
		int x;sf("%d",&x);
		pf("%d\n",num[x]);
	}
}

Compilation message (stderr)

cell.cpp: In function 'int main()':
cell.cpp:16:4: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |  sf("%d%d",&n,&k);
      |    ^
cell.cpp:20:13: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 |   int x,y;sf("%d%d",&x,&y);
      |             ^
cell.cpp:41:11: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   41 |   int x;sf("%d",&x);
      |           ^

• Subtask 1: 4 / 4
• Subtask 2: 12 / 12
• Subtask 3: 0 / 8
• Subtask 4: 0 / 8
• Subtask 5: 0 / 17
• Subtask 6: 0 / 25
• Subtask 7: 0 / 26