WHY

P1162 填涂颜色

tengyuxuan @ 2024-12-23 20:33:25

0pts:

#include <bits/stdc++.h>
using namespace std;
struct node{
    int x,y;
};
int fx[]={1,0,-1,0};
int fy[]={0,1,0,-1};
queue<node> q;
int n;
int a[32][32];
void bfs()
{
    q.push({0,0});
    while(!q.empty())
    {
        node fir=q.front();
        for(int i=0;i<4;i++)
        {
            int dx=fir.x+fx[i];
            int dy=fir.y+fy[i];
            if(dx>=0&&dx<=n+1&&dy>=0&&dy<=n+1&&a[dx][dy]==0)
               {
                    q.push({dx,dy});
                    a[dx][dy]=3;
            }
        }
        q.pop();
    }
}
int main()
{
    ios::sync_with_stdio(0);
    cin>>n;
    for(int i=1;i<=n;i++)
    {
        for(int j=1;j<=n;j++)
        {
            cin>>a[i][j];
        }
    }
    bfs();
    for(int i=1;i<=n;i++)
    {
        for(int j=1;j<=n;j++)
        {
            if(a[i][j]==3)
            {
                cout<<"0 ";
            }else if(a[i][j]==0){
                cout<<"2 ";
            }else{
                cout<<"1 ";
            }
        }
        cout<<endl;
    }
    return 0;
}

100pts:

#include <bits/stdc++.h>
using namespace std;
struct node{
    int x,y;
};
int fx[]={1,0,-1,0};
int fy[]={0,1,0,-1};
queue<node> q;
int n;
int a[32][32];
void bfs()
{
    q.push({0,0});
    while(!q.empty())
    {
        node fir=q.front();
        for(int i=0;i<4;i++)
        {
            int dx=fir.x+fx[i];
            int dy=fir.y+fy[i];
            if(dx>=0&&dx<=n+1&&dy>=0&&dy<=n+1)
            {
                if(a[dx][dy]==0)
                {
                    q.push({dx,dy});
                    a[dx][dy]=3;
                }
            }
        }
        q.pop();
    }
}
int main()
{
    ios::sync_with_stdio(0);
    cin>>n;
    for(int i=1;i<=n;i++)
    {
        for(int j=1;j<=n;j++)
        {
            cin>>a[i][j];
        }
    }
    bfs();
    for(int i=1;i<=n;i++)
    {
        for(int j=1;j<=n;j++)
        {
            if(a[i][j]==3)
            {
                cout<<"0 ";
            }else if(a[i][j]==0){
                cout<<"2 ";
            }else{
                cout<<"1 ";
            }
        }
        cout<<endl;
    }
    return 0;
}

by tengyuxuan @ 2024-12-23 20:49:36

0分时死活都不知道哪错了现在也不知道


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