제출 #654595

#제출 시각아이디문제언어결과실행 시간메모리
654595Mohammad_ParsaT-Covering (eJOI19_covering)C++14
100 / 100
138 ms57572 KiB
/* in the name of allah */ #include<bits/stdc++.h> using namespace std; #define ll long long #define pb push_back #define F first #define S second #define mk make_pair #define int long long const int N=2e3+7; int mn,t,M,ty,x[N*N],y[N*N]; vector<int> z[N],a[N],b[N],yek[N],vis[N]; int dx[4]={-2,2,0,0},xd[4]={-1,1,0,0}; int dy[4]={0,0,-2,2},yd[4]={0,0,-1,1}; int sumz(int x,int y){ int ans=0; for(int i=-1;i<=1;i++) for(int j=-1;j<=1;j++) ans+=z[x+i][y+j]; return ans; } void dfs(int x,int y){ vis[x][y]=1;M++;ty+=yek[x][y]; b[x][y]=1; for(int i=0;i<4;i++){ int p=x+dx[i],q=y+dy[i]; if(p>=0 && q>=0 && z[p][q]){ t++; if(!vis[p][q]) dfs(p,q); } if(x+xd[i]>=0 && y+yd[i]>=0) mn=min(mn,a[x+xd[i]][y+yd[i]]),b[x+xd[i]][y+yd[i]]=1; } } int32_t main(){ ios:: sync_with_stdio(0),cin.tie(0),cout.tie(0); int n,m; cin>>n>>m; int g=0; if(n>m) g=1,swap(n,m); for(int i=0;i<=n+5;i++){ a[i].resize(m+5); b[i].resize(m+5); z[i].resize(m+5); vis[i].resize(m+5); yek[i].resize(m+5); for(int j=0;j<m+5;j++){ a[i][j]=1007; } } if(g) swap(n,m); for(int i=1;i<=n;i++){ for(int j=1;j<=m;j++){ if(g) swap(i,j); cin>>a[i][j]; if(g) swap(i,j); } } int k; cin>>k; for(int i=0;i<k;i++){ cin>>x[i]>>y[i];x[i]++;y[i]++; if(g) swap(x[i],y[i]); z[x[i]][y[i]]=1; } if(g) swap(n,m); int f=0; for(int i=0;i<k;i++){ if((x[i]==1 && y[i]==1) || (x[i]==n && y[i]==1) || (x[i]==1 && y[i]==m) || (x[i]==n && y[i]==m)){ if(sumz(x[i],y[i])>0) f=1; } else if(x[i]==1 || x[i]==n || y[i]==1 || y[i]==m){ if(sumz(x[i],y[i])>1) f=1; } else{ if(sumz(x[i],y[i])>2) f=1; } } int ans=0; for(int i=0;i<k;i++){ int p=x[i],q=y[i]; if(p==1 || p==n || q==1 || q==m){ b[p][q]=b[p-1][q]=b[p+1][q]=b[p][q-1]=b[p][q+1]=1; yek[p][q]=1; } else if(sumz(p,q)==2){ b[p][q]=b[p-1][q]=b[p+1][q]=b[p][q-1]=b[p][q+1]=1; yek[p][q]=1; } } for(int i=0;i<k;i++){ if(!vis[x[i]][y[i]]){ mn=1e9;t=0;M=0;ty=0; dfs(x[i],y[i]); t/=2; //cout<<M<<" "<<t<<endl; if(ty>1) f=1; if(t>M) f=1; if(t==M && ty==1) f=1; if(t==M-1 && ty==0) ans-=mn; } } for(int i=1;i<=n;i++){ for(int j=1;j<=m;j++){ ans+=b[i][j]*a[i][j]; } } if(n==1 || m==1) f=1; if(f){ cout<<"No"; return 0; } cout<<ans; }
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