Submission #1049628

#	Time	Username	Problem	Language	Result	Execution time	Memory
1049628		vjudge1	T-Covering (eJOI19_covering)	C++17	100 / 100	61 ms	20052 KiB

covering

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define fi first
#define se second
vector<vector<int>> a,check,dp;
int m,n,k,x,y,ketqua;
int dx[]={0,0,-1,1};
int dy[]={1,-1,0,0};
int soluong,minn,tong,soluongx;
void dfs(int u,int v)
{
    check[u][v]=1;
    soluongx+=dp[u][v];
    tong+=a[u][v];
    if (dp[u][v]==0) minn=min(minn,a[u][v]),soluong++;
    for (int i=0;i<4;++i)
    {
        int u1=u+dx[i];
        int v1=v+dy[i];
        if (u1==0 || u1==m+1 || v1==0 || v1==n+1 || dp[u1][v1]==dp[u][v] || check[u1][v1]) continue;
        dfs(u1,v1);
    }
}
main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
    cin>>m>>n;
    a.resize(m+1);
    dp.resize(m+1);
    check.resize(m+1);
    for (int i=1;i<=m;++i)
    {
        a[i].resize(n+1);
        check[i].resize(n+1);
        dp[i].resize(n+1);
    }
    for (int i=1;i<=m;++i)
    {
        for (int j=1;j<=n;++j) cin>>a[i][j];
    }
    cin>>k;
    for (int i=1;i<=k;++i)
    {
        cin>>x>>y;
        x++;
        y++;
        dp[x][y]=1;
    }
    for (int i=1;i<=m;++i)
    {
        for (int j=1;j<=n;++j)
        {
            if (check[i][j] || dp[i][j]==0) continue;
            minn=10000000;
            tong=0;
            soluong=0;
            soluongx=0;
            dfs(i,j);
            if (soluong!=3*soluongx && soluong!=3*soluongx+1)
            {
                cout<<"No";
                return 0;
            }
            ketqua+=tong;
            if (soluong==soluongx*3+1) ketqua-=minn;
        }
    }
    cout<<ketqua;
}

Compilation message (stderr)

covering.cpp:25:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   25 | main()
      | ^~~~

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 15 / 15
• Subtask 6: 20 / 20
• Subtask 7: 30 / 30