Submission #498489

#TimeUsernameProblemLanguageResultExecution timeMemory
498489uncriptedT-Covering (eJOI19_covering)C++11
0 / 100
48 ms102404 KiB
#include<bits/stdc++.h> #define f first #define se second #define pb push_back using namespace std; long long ss=0; long long size=0; multiset<long long> t; long long nsize=0; long long a[5000][5000]; long long r[5000][5000]; long long fix[5000][5000]; long long gr[5000][5000]; long long vis[5000][5000]; vector<pair<long long,long long> > adj[5000][5000]; void dfs(pair<long long,long long> p){ vis[p.f][p.se]=1; nsize++; if(vis[p.f-1][p.se]!=1){ size++; } if(vis[p.f+1][p.se]!=1){ size++; } if(vis[p.f][p.se-1]!=1){ size++; } if(vis[p.f][p.se+1]!=1){ size++; } t.insert(a[p.f-1][p.se]); t.insert(a[p.f+1][p.se]); t.insert(a[p.f][p.se-1]); t.insert(a[p.f][p.se+1]); vis[p.f-1][p.se]=1; vis[p.f+1][p.se]=1; vis[p.f][p.se-1]=1; vis[p.f][p.se+1]=1; for(long long i=0; i<adj[p.f][p.se].size(); i++){ if(vis[adj[p.f][p.se][i].f][adj[p.f][p.se][i].se]){ continue; } dfs({adj[p.f][p.se][i].f, adj[p.f][p.se][i].se}); } } int main(){ long long n,m; cin>>n>>m; for(long long i=0; i<n; i++){ for (long long j=0; j<m; j++){ cin>>a[i][j]; r[i][j]=0; fix[i][j]=0; gr[i][j]=0; vis[i][j]=0; } } long long k; cin>>k; pair<long long,long long> c[k]; for(long long i=0; i<k; i++){ cin>>c[i].f>>c[i].se; r[c[i].f][c[i].se]=1; } long long pas=0; pair<long long,long long> d[8]={{1,1}, {1,0}, {1,-1}, {0,1}, {0, -1}, {-1,1}, {-1, 0}, {-1,-1}}; for(long long i=0; i<n; i++){ for(long long j=0; j<m; j++){ long long p=0; for(long long ii=0; ii<8; ii++){ long long x=i+d[ii].f; long long y=j+d[ii].se; if(r[i][j]==1 && r[x][y]==1){ p++; if(i+1>=n || i-1<0 || j-1<0 || j+1>=m || x+1>=n || x-1<0 || y-1<0 || y+1>=m){ cout<<"No"<<endl; return 0; } fix[i][j]=1; fix[i+1][j]=1; fix [i-1][j]=1; fix[i][j-1]=1; fix[i][j+1]=1; fix[x][y]=1; fix[x+1][y]=1; fix[x-1][y]=1; fix[x][y-1]=1; fix[x][y+1]=1; } } if(p>1){ cout<<"No"<<endl; return 0; } } } for(long long asd=0; asd<k; asd++){ for(long long i=0; i<k; i++){ long long x=c[i].f,y=c[i].se; if(fix[x][y]==1){ continue; } long long bruh=4; bool left=true,right=true,up=true,down=true; if(x+1>=n){ bruh--; up=false; }else if(fix[x+1][y]==1 || r[x+1][y]==1){ bruh--; up=false; } if(x-1<0){ bruh--; down=false; }else if(fix[x-1][y]==1 || r[x-1][y]==1){ bruh--; down=false; } if(y-1<0){ bruh--; left=false; }else if(fix[x][y-1]==1 || r[x][y-1]==1){ bruh--; left=false; } if( y+1>=m){ bruh--; right=false; }else if(fix[x][y+1]==1 || r[x][y+1]==1){ bruh--; right=false; } if(bruh==3){ fix[x][y]=1; if(up==true){ fix[x+1][y]=1; } if(down==true){ fix[x-1][y]=1; } if(left==true){ fix[x][y-1]=1; } if(right==true){ fix[x][y+1]=1; } } if(bruh<3){ cout<<"No"; return 0; } if(bruh==4){ gr[x][y]=1; } } } for(long long i=0; i<n; i++){ for(long long j=0; j<m; j++){ if(gr[i][j]==0){ continue; } if(i+2<n){ if(gr[i+2][j]==1){ adj[i][j].pb({i+2,j}); } } if(i-2>=0){ if(gr[i-2][j]==1){ adj[i][j].pb({i-2,j}); } } if(j+2<m){ if(gr[i][j+2]==1){ adj[i][j].pb({i,j+2}); } } if(j-2>=0){ if(gr[i][j-2]==1){ adj[i][j].pb({i,j-2}); } } } } for(long long i=0; i<n; i++){ for(long long j=0; j<m; j++){ if(vis[i][j]==0 && gr[i][j]==1 ){ dfs({i,j}); if(size==3*nsize+1){ ss+=*t.begin(); } if(size<3*nsize){ cout<<"No"<<endl; return 0; } t.clear(); } } } for(long long i=0; i<n; i++){ for(long long j=0; j<m; j++){ if(fix[i][j]==1 || vis[i][j]==1){ pas+=a[i][j]; } } } cout<<pas-ss; }

Compilation message (stderr)

covering.cpp: In function 'void dfs(std::pair<long long int, long long int>)':
covering.cpp:41:22: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |  for(long long i=0; i<adj[p.f][p.se].size(); i++){
      |                     ~^~~~~~~~~~~~~~~~~~~~~~
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