Submission #1084133

#TimeUsernameProblemLanguageResultExecution timeMemory
1084133hahahahaPortals (BOI14_portals)C++17
100 / 100
428 ms84560 KiB
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#define i64 long long #define ld long double #define bit(n,i) ((n>>i)&1) #define pii pair<int,int> #define sz(x) (int)x.size() #define FOR(i,a,b) for(int i=a; i<=b; i++) #define FOD(i,a,b) for(int i=a; i>=b; i--) #define fi first #define se second #define pb push_back #define all(x) x.begin(),x.end() #define __sumairu__ main() #define die_hard_onimai_fan void seggs() #define file(name) if(fopen(name".inp","r")){freopen(name".inp","r",stdin);freopen(name".out","w",stdout);} #define brute(name) if(fopen(name".inp","r")){freopen(name".inp","r",stdin);freopen(name".ans","w",stdout);} #define TIME (1.0*clock()/CLOCKS_PER_SEC) #define FAST ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0); #define ai(n) array<int,n> #define dbg(x) {cerr<<#x<<' '<<x<<endl;} #define dbgArr(arr,n) {cerr<<#arr;FOR(_i,1,n)cerr<<' '<<(arr)[_i];cerr<<endl;} template <typename T,typename U> ostream& operator<<(ostream &os,pair<T,U>p){ return os<<"{"<<p.fi<<", "<<p.se<<"}"; } mt19937_64 rd(chrono::steady_clock::now().time_since_epoch().count()); #define i64 long long #define debug 0 const int mod=1e9+7; //const int mod=998244353; const int inf=1e9; ///check the limits, dummy const int N=1003; int n,m; char a[N][N]; int c[N][N]; int d[N][N]; int id(int x,int y) { return (x-1)*m+y; } pii mv[]={{1,0},{0,1},{-1,0},{0,-1}}; vector<pii>dir[N][N]; die_hard_onimai_fan { cin>>n>>m; pii s,t; FOR(i,1,n)FOR(j,1,m) { cin>>a[i][j]; if(a[i][j]=='S')s={i,j}; if(a[i][j]=='C')t={i,j}; } FOR(i,0,n+1)a[i][0]=a[i][m+1]='#'; FOR(j,0,m+1)a[0][j]=a[n+1][j]='#'; // cout<<'\n'; // FOR(i,0,n+1) // { // FOR(j,0,m+1)cout<<a[i][j]; // cout<<'\n'; // } FOR(j,1,m) { int lst=-1; FOR(i,1,n) { if(a[i-1][j]=='#')lst=i; dir[i][j].pb({lst,j}); } lst=-1; FOD(i,n,1) { if(a[i+1][j]=='#')lst=i; dir[i][j].pb({lst,j}); } } FOR(i,1,n) { int lst=-1; FOR(j,1,m) { if(a[i][j-1]=='#')lst=j; dir[i][j].pb({i,lst}); } lst=-1; FOD(j,m,1) { if(a[i][j+1]=='#')lst=j; dir[i][j].pb({i,lst}); } } FOR(i,1,n) { FOR(j,1,m) { c[i][j]=inf; if(a[i][j]=='#')continue; FOR(k,0,3) { c[i][j]=min(c[i][j],abs(dir[i][j][k].fi-i)+abs(dir[i][j][k].se-j)); } } } priority_queue<ai(3),vector<ai(3)>,greater<ai(3)>>pq; memset(d,60,sizeof d); d[s.fi][s.se]=0; pq.push({0,s.fi,s.se}); while(sz(pq)) { auto [du,x,y]=pq.top(); pq.pop(); if(du>d[x][y])continue; FOR(k,0,3) { int X=x+mv[k].fi,Y=y+mv[k].se; if(a[X][Y]=='#')continue; if(d[X][Y]>d[x][y]+1) { d[X][Y]=d[x][y]+1; pq.push({d[X][Y],X,Y}); } } FOR(k,0,3) { auto [X,Y]=dir[x][y][k]; if(d[X][Y]>d[x][y]+c[x][y]+1) { d[X][Y]=d[x][y]+c[x][y]+1; pq.push({d[X][Y],X,Y}); } } } // FOR(i,1,n) // { // FOR(j,1,m)cout<<d[id(i,j)]<<' '; // cout<<'\n'; // } cout<<d[t.fi][t.se]<<'\n'; } __sumairu__ { FAST file(""); int tt=1;//cin>>tt; while(tt--)seggs(); cerr<<"\nTime elapsed: "<<TIME<<" s.\n"; } /** 4 4 .#.C .#.# .... S... */

Compilation message (stderr)

portals.cpp:57:21: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   57 | #define __sumairu__ main()
      |                     ^~~~
portals.cpp:205:1: note: in expansion of macro '__sumairu__'
  205 | __sumairu__
      | ^~~~~~~~~~~
portals.cpp: In function 'int main()':
portals.cpp:59:53: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   59 | #define file(name) if(fopen(name".inp","r")){freopen(name".inp","r",stdin);freopen(name".out","w",stdout);}
      |                                              ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
portals.cpp:208:5: note: in expansion of macro 'file'
  208 |     file("");
      |     ^~~~
portals.cpp:59:83: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   59 | #define file(name) if(fopen(name".inp","r")){freopen(name".inp","r",stdin);freopen(name".out","w",stdout);}
      |                                                                            ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
portals.cpp:208:5: note: in expansion of macro 'file'
  208 |     file("");
      |     ^~~~
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