Submission #1025598

#TimeUsernameProblemLanguageResultExecution timeMemory
1025598hahahahaKOVANICE (COI15_kovanice)C++17
50 / 100
1102 ms524288 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 P=998244353; const int inf=1e9; ///check the limits, dummy const int N=3e5+5; struct DSU { vector<int>p; DSU(int n):p(n+10,-1){} struct dsu_save { int u,v,lu,lv; }; stack<dsu_save>op; void rollback(int sz) { while(sz(op)>sz) { auto psy=op.top(); op.pop(); p[psy.u]=psy.lu; p[psy.v]=psy.lv; } } int fs(int u){return p[u]<0?u:fs(p[u]);} void uni(int u,int v) { u=fs(u),v=fs(v); if(u==v)return; if(p[u]>p[v])swap(u,v); op.push({u,v,p[u],p[v]}); p[u]+=p[v]; p[v]=u; } }; int n,m,q; vector<int>adj[N]; vector<int>cal(vector<pii>&eds) { FOR(i,1,m)adj[i].clear(); vector<int>deg(m+1); for(auto [u,v]:eds) { adj[u].pb(v); deg[v]++; } vector<int>d(m+1); queue<int>q; FOR(u,1,m)if(!deg[u]) { q.push(u); d[u]=1; } while(sz(q)) { int u=q.front(); q.pop(); for(int v:adj[u]) { d[v]=max(d[v],d[u]+1); q.push(v); } } return d; } die_hard_onimai_fan { cin>>n>>m>>q; DSU dsu(m+10); vector<pii>eds; FOR(i,1,q) { int u,v; char c; cin>>u>>c>>v; if(c=='=')dsu.uni(u,v); else { if(c=='>')swap(u,v); eds.pb({u,v}); } } for(auto &[u,v]:eds)u=dsu.fs(u),v=dsu.fs(v); vector<int>d=cal(eds); for(auto &[u,v]:eds)swap(u,v); vector<int>dr=cal(eds); FOR(i,1,m) { int x=dsu.fs(i); assert(d[x]<=n); if(d[x]+dr[x]-1==n)cout<<'K'<<d[x]; else cout<<'?'; cout<<'\n'; } } __sumairu__ { FAST file(""); int tt=1;//cin>>tt; while(tt--)seggs(); cerr<<"\nTime elapsed: "<<TIME<<" s.\n"; } /** 3 100 3 10<20 2<4 3=5 */

Compilation message (stderr)

kovanice.cpp:57:21: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   57 | #define __sumairu__ main()
      |                     ^~~~
kovanice.cpp:183:1: note: in expansion of macro '__sumairu__'
  183 | __sumairu__
      | ^~~~~~~~~~~
kovanice.cpp: In function 'int main()':
kovanice.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);}
      |                                              ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
kovanice.cpp:186:5: note: in expansion of macro 'file'
  186 |     file("");
      |     ^~~~
kovanice.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);}
      |                                                                            ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
kovanice.cpp:186:5: note: in expansion of macro 'file'
  186 |     file("");
      |     ^~~~
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