제출 #1082895

#제출 시각아이디문제언어결과실행 시간메모리
1082895hahahahaConstruction of Highway (JOI18_construction)C++17
100 / 100
415 ms24528 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()); i64 Rand(i64 l,i64 r) { i64 ans=l+1ll*rd()*rd()%(r-l+1); assert(l<=ans&&ans<=r); return ans; } //const i64 base=1e9+7; //const i64 mod=(1ll<<53)+5; #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=1e5+5; vector<pii>segments; struct seg { struct node { int mn,mx; node(){mn=inf,mx=-inf;} }t[N*4]; int lz[N*4]; node combine(node&a,node&b) { node ans; ans.mn=min(a.mn,b.mn); ans.mx=max(a.mx,b.mx); return ans; } void push(int id) { if(!lz[id])return; int x=lz[id]; FOR(i,id*2,id*2+1)t[i].mn=t[i].mx=lz[i]=x; lz[id]=0; } void up(int id,int l,int r,int x,int y,int v) { if(x>r||y<l)return; if(x<=l&&r<=y) { t[id].mn=t[id].mx=lz[id]=v; assert(v!=0); return; } push(id); int m=(l+r)/2; up(id*2,l,m,x,y,v); up(id*2+1,m+1,r,x,y,v); t[id]=combine(t[id*2],t[id*2+1]); } void get(int id,int l,int r,int x,int y) { if(x>r||y<l)return; if(x<=l&&r<=y&&t[id].mn==t[id].mx) { segments.pb({r-l+1,t[id].mn}); return; } int m=(l+r)/2; push(id); get(id*2+1,m+1,r,x,y); get(id*2,l,m,x,y); } int Find(int id,int l,int r,int p) { if(p>r||p<l)return 0; if(l==r)return t[id].mx; int m=(l+r)/2; push(id); return Find(id*2,l,m,p)+Find(id*2+1,m+1,r,p); } }T; struct Fenwick { int bit[N]; int n; int get(int i) { int ans=0; for(++i;i>0;i-=i&-i)ans+=bit[i]; return ans; } int get(int l,int r) { return get(r)-get(l-1); } void add(int i,int v) { for(++i;i<N;i+=i&-i)bit[i]+=v; } }fen; vector<int>adj[N]; int n,c[N]; int h[N],head[N],sz[N],heavy[N],par[N],id[N]; int cnt; void dfs(int u,int p=0) { h[u]=h[p]+1; sz[u]=1; for(int v:adj[u])if(v!=p) { par[v]=u; dfs(v,u); sz[u]+=sz[v]; if(sz[v]>sz[heavy[u]])heavy[u]=v; } } void hld(int u,int h=1) { head[u]=h; id[u]=++cnt; if(heavy[u])hld(heavy[u],h); for(int v:adj[u])if(v!=par[u]&&v!=heavy[u]) { hld(v,v); } } i64 get(int u,int v) { segments.clear(); int x=1,y=u; while(head[x]!=head[y]) { if(h[head[x]]>h[head[y]])swap(x,y); T.get(1,1,n,id[head[y]],id[y]); T.up(1,1,n,id[head[y]],id[y],c[v]); y=par[head[y]]; } if(h[x]>h[y])swap(x,y); T.get(1,1,n,id[x],id[y]); T.up(1,1,n,id[x],id[y],c[v]); i64 ans=0; for(auto&&[len,val]:segments) { ans+=1ll*len*fen.get(val-1); fen.add(val,len); } for(auto&&[len,val]:segments)fen.add(val,-len); return ans; } die_hard_onimai_fan { cin>>n; vector<int>val; FOR(i,1,n) { cin>>c[i]; val.pb(c[i]); } sort(all(val)); val.erase(unique(all(val)),val.end()); FOR(i,1,n)c[i]=lower_bound(all(val),c[i])-val.begin()+1; vector<pii>eds; FOR(i,2,n) { int u,v; cin>>u>>v; eds.pb({u,v}); adj[u].pb(v); adj[v].pb(u); } dfs(1); hld(1); FOR(i,1,n)T.up(1,1,n,id[i],id[i],c[i]); for(auto&&[u,v]:eds)cout<<get(u,v)<<'\n'; } __sumairu__ { FAST file(""); int tt=1;//cin>>tt; while(tt--)seggs(); cerr<<"\nTime elapsed: "<<TIME<<" s.\n"; } /** 10 1 7 3 4 8 6 2 9 10 5 1 2 1 3 2 4 3 5 2 6 3 7 4 8 5 9 6 10 */

컴파일 시 표준 에러 (stderr) 메시지

construction.cpp:57:21: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   57 | #define __sumairu__ main()
      |                     ^~~~
construction.cpp:260:1: note: in expansion of macro '__sumairu__'
  260 | __sumairu__
      | ^~~~~~~~~~~
construction.cpp: In function 'int main()':
construction.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);}
      |                                              ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
construction.cpp:263:5: note: in expansion of macro 'file'
  263 |     file("");
      |     ^~~~
construction.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);}
      |                                                                            ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
construction.cpp:263:5: note: in expansion of macro 'file'
  263 |     file("");
      |     ^~~~
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