oj.uz

답안 #958668

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
958668 2024-04-06T10:07:47 Z shenfe1 바이러스 (JOI19_virus) C++17
6 / 100
 454 ms 262144 KB 
#include <bits/stdc++.h>
 
#pragma optimize("Ofast")
#pragma target("avx2")
#pragma optimize("unroll-loops")
 
using namespace std;
 
#define ll long long
#define ld long double
#define pb push_back
#define pf push_front
#define pii pair<int,int>
#define all(v) v.begin(),v.end()
#define F first
#define S second
#define mem(a,i) memset(a,i,sizeof(a))
#define sz(s) (int)s.size()
#define y1 yy
#define ppb pop_back
#define lb lower_bound
#define ub upper_bound
#define gcd(a,b) __gcd(a,b)
#define in insert
#define int ll
#define ull unsigned ll
 
const int MAX=800*800+10;
const int B=331;
const int maxB=1000;
const int N=810;
const int block=450;
const int inf=1e9;  
const int mod=1e9+7;
const int mod1=1e9+9;
const ld eps=1e-9;
 
int dx[8]={-1,0,1,0,1,-1,-1,1};
int dy[8]={0,-1,0,1,1,-1,1,-1};
 
int binpow(int a,int n){
  if(!n)return 1;
  if(n%2==1)return a*binpow(a,n-1)%mod;
  int k=binpow(a,n/2);
  return k*k%mod;
}
 
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
 
int m,r,c;
string s;
int b[MAX];
int a[N][N];
int mx[MAX];
bool is[N][N][16];
 
int bit(int i,int j){
  return (i>>j)&1;
}
 
bool valid(int x,int y){
  return (1<=x&&x<=r&&1<=y&&y<=c);
}
 
int use[N][N];
int tin[N][N],fup[N][N],timer;
 
vector<pii> g[N][N];
vector<pii> g1[N][N];
map<pii,bool> mp[N][N];
pii f[N][N];
int ans=inf,cnt;
bool bad[N][N];
 
pii get(pii a){
  if(f[a.F][a.S]==a)return a;
  return f[a.F][a.S]=get(f[a.F][a.S]);
}
 
void unite(int i,int j,int ni,int nj){
  // cout<<"MRG "<<i<<" "<<j<<" "<<ni<<" "<<nj<<"\n";
  bad[i][j]|=bad[ni][nj];
  
  if(sz(mp[i][j])<sz(mp[ni][nj])){
    swap(mp[i][j],mp[ni][nj]);
  }
  for(pair<pii,bool> x:mp[ni][nj]){
    mp[i][j][x.F]=1;
  }
  for(pair<pii,bool> x:mp[ni][nj]){
    for(int k=0;k<4;k++){
      int toi=x.F.F+dx[k];
      int toj=x.F.S+dy[k];
      if(mp[i][j].count({toi,toj})||!valid(toi,toj))continue;
      int mask=0;
      for(int f=0;f<4;f++){
        int nwi=toi+dx[(f)%4];
        int nwj=toj+dy[(f)%4];
        if(mp[i][j].count({nwi,nwj})){
          mask+=(1<<f);
        }
      }
      if(is[toi][toj][mask]){
        g[i][j].pb({toi,toj});
        // cout<<"NEW "<<i<<" "<<j<<" "<<toi<<" "<<toj<<"\n";
      }
    }
  }
  f[ni][nj]={i,j};
  mp[ni][nj].clear();
}
 
 
void dfs(int i,int j){
  // cout<<i<<" "<<j<<"\n";
  sort(all(g[i][j]));
  reverse(all(g[i][j]));
  use[i][j]=1;
  tin[i][j]=fup[i][j]=++timer;
  while(!g[i][j].empty()){
    pii to=get(g[i][j].back());
    g[i][j].ppb();
    if(!use[to.F][to.S]){
      dfs(to.F,to.S);
      fup[i][j]=min(fup[i][j],fup[to.F][to.S]);
      if(fup[to.F][to.S]<=tin[i][j]){
        unite(i,j,to.F,to.S);
      }
      else{
        bad[i][j]=1;
      }
    }
    else{
      if(tin[to.F][to.S]==inf){
        bad[i][j]=1;
      }
      else fup[i][j]=min(fup[i][j],tin[to.F][to.S]);
    }
  }
  if(tin[i][j]==fup[i][j]&&!bad[i][j]){
    // cout<<i-1<<" "<<j-1<<" "<<sz(mp[i][j])<<"\n";
    if(sz(mp[i][j])<ans){
      ans=sz(mp[i][j]);
      cnt=1;
    }
    else if(sz(mp[i][j])==ans){
      cnt++;
    }
  }
  tin[i][j]=inf;
}
 
void solve(){
  cin>>m>>r>>c;
  cin>>s;
  s=s+s;
 
  for(int i=1;i<=r;i++){
    for(int j=1;j<=c;j++){
      cin>>a[i][j];
      if(a[i][j]==0)a[i][j]=inf+1;
    }
  }
 
  for(int i=0;i<sz(s);i++){
    if(s[i]=='N')b[i]=0;
    if(s[i]=='W')b[i]=1;
    if(s[i]=='S')b[i]=2;
    if(s[i]=='E')b[i]=3;
  }
 
  for(int mask=0;mask<16;mask++){
    int l=0;
    for(int i=0;i<=sz(s);i++){
      if(i==sz(s)||!bit(mask,b[i])){
        mx[mask]=max(mx[mask],l);
        l=0;
      }
      else l++;
    }
    if(mx[mask]==sz(s)){
      mx[mask]=inf;
    }
    // cout<<mask<<" "<<mx[mask]<<"\n";
  }
 
  for(int i=1;i<=r;i++){
    for(int j=1;j<=c;j++){
      if(a[i][j]==inf+1)continue;
      f[i][j]={i,j};
      mp[i][j][{i,j}]=1;
      for(int mask=0;mask<16;mask++){
        bool good=1;
        int m1=0;
        for(int k=0;k<4;k++){
          int ni=i+dx[(k)%4];
          int nj=j+dy[(k)%4];
          if(bit(mask,k)&&!valid(ni,nj)){
            good=0;
          }
        }
        
        if(good&&mx[mask]>=a[i][j]){
          is[i][j][mask]=1;
        }
        // cout<<i<<" "<<j<<" "<<mask<<" "<<mx[mask]<<" "<<is[i][j][mask]<<"\n";
      }
    }
  }
 
  set<pair<pii,pii>> st,st1;

  for(int i=1;i<=r;i++){
    for(int j=1;j<=c;j++){
      for(int k=0;k<4;k++){
        int ni=i+dx[k];
        int nj=j+dy[k];
        if(a[i][j]!=inf+1&&a[ni][nj]!=inf+1&&valid(ni,nj)&&is[ni][nj][(1<<((k+2)%4))]){
          g[i][j].pb({ni,nj});
          st.in({{i,j},{ni,nj}});
        }
        if(a[i][j]!=inf+1&&a[ni][nj]!=inf+1&&valid(ni,nj)&&is[i][j][(1<<((k)%4))]){
          // g[ni][nj].pb({i,j});
          st1.in({{ni,nj},{i,j}});
        }
      }
    }
  }
  // cout<<"\n";
  
  for(int i=1;i<=r;i++){
    for(int j=1;j<=c;j++){
      if(!use[i][j]){
        if(a[i][j]!=inf+1)dfs(i,j);
      }
    }
  }

  if(ans==inf){
    cout<<"0\n0\n";
    return;
  }
  cout<<ans<<"\n";
  cout<<cnt*ans<<"\n";
 
}
 
signed main(){
  // freopen("triangles.in","r",stdin);
  // freopen("triangles.out","w",stdout);
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  // prec();
  int t=1;
  // cin>>t;
  while(t--)solve();
}

Compilation message

virus.cpp:3: warning: ignoring '#pragma optimize ' [-Wunknown-pragmas]
    3 | #pragma optimize("Ofast")
      | 
virus.cpp:4: warning: ignoring '#pragma target ' [-Wunknown-pragmas]
    4 | #pragma target("avx2")
      | 
virus.cpp:5: warning: ignoring '#pragma optimize ' [-Wunknown-pragmas]
    5 | #pragma optimize("unroll-loops")
      | 
virus.cpp: In function 'void solve()':
virus.cpp:194:13: warning: unused variable 'm1' [-Wunused-variable]
  194 |         int m1=0;
      |             ^~

Subtask #1
0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 74 ms 76880 KB Output is correct
2 Correct 443 ms 229360 KB Output is correct
3 Runtime error 454 ms 262144 KB Execution killed with signal 9
4 Halted 0 ms 0 KB -

Subtask #2
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 15 ms 74324 KB Output is correct
2 Correct 19 ms 76800 KB Output is correct
3 Correct 28 ms 76792 KB Output is correct
4 Correct 18 ms 76800 KB Output is correct
5 Correct 28 ms 74752 KB Output is correct
6 Correct 34 ms 80896 KB Output is correct
7 Correct 17 ms 74588 KB Output is correct
8 Correct 28 ms 79100 KB Output is correct
9 Correct 20 ms 77656 KB Output is correct
10 Correct 19 ms 76800 KB Output is correct
11 Correct 19 ms 77140 KB Output is correct
12 Correct 21 ms 78172 KB Output is correct
13 Correct 30 ms 80376 KB Output is correct
14 Correct 30 ms 80120 KB Output is correct
15 Correct 30 ms 80520 KB Output is correct
16 Correct 30 ms 80120 KB Output is correct
17 Correct 25 ms 79708 KB Output is correct
18 Correct 20 ms 77800 KB Output is correct
19 Correct 28 ms 78880 KB Output is correct

Subtask #3
0 / 80.0

# 결과 실행 시간 메모리 Grader output
1 Correct 74 ms 76880 KB Output is correct
2 Correct 443 ms 229360 KB Output is correct
3 Runtime error 454 ms 262144 KB Execution killed with signal 9
4 Halted 0 ms 0 KB -