Submission #1083601

#TimeUsernameProblemLanguageResultExecution timeMemory
1083601hahahahaTwo Antennas (JOI19_antennas)C++17
100 / 100
282 ms38488 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=2e9; ///check the limits, dummy const int N=2e5+5; int h[N],l[N],r[N]; int n,q; vector<int>H[N]; int ans[N]; vector<pii>Q[N]; struct seg { int Max[N*4],Min[N*4],lmn[N*4],lmx[N*4],ans[N*4]; void build(int id,int l,int r) { Max[id]=lmx[id]=-1; Min[id]=lmn[id]=inf; ans[id]=-1; if(l==r)return; int m=(l+r)/2; build(id*2,l,m); build(id*2+1,m+1,r); } void push(int id) { if(lmn[id]<inf) { int x=lmn[id]; FOR(i,id*2,id*2+1) { lmn[i]=min(lmn[i],x); ans[i]=max(ans[i],Max[i]-x); } lmn[id]=inf; } if(lmx[id]>-1) { int x=lmx[id]; FOR(i,id*2,id*2+1) { lmx[i]=max(lmx[i],x); ans[i]=max(ans[i],x-Min[i]); } lmx[id]=-1; } } void toggle(int id,int l,int r,int p) { if(p>r||p<l)return; if(l==r) { if(Max[id]>=0)Max[id]=-1,Min[id]=inf; else Max[id]=Min[id]=h[l]; return; } push(id); int m=(l+r)/2; toggle(id*2,l,m,p); toggle(id*2+1,m+1,r,p); Max[id]=max(Max[id*2],Max[id*2+1]); Min[id]=min(Min[id*2],Min[id*2+1]); } void toggle(int idx) { //cout<<"toggle: "<<idx<<'\n'; toggle(1,1,n,idx); } 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) { lmn[id]=min(lmn[id],v); lmx[id]=max(lmx[id],v); ans[id]=max({ans[id],Max[id]-v,v-Min[id]}); 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); ans[id]=max({ans[id],ans[id*2],ans[id*2+1]}); } void up(int l,int r,int v) { //cout<<"up: "<<l<<' '<<r<<' '<<v<<'\n'; up(1,1,n,l,r,v); } int get(int id,int l,int r,int x,int y) { if(x>r||y<l)return -1; if(x<=l&&r<=y)return ans[id]; int m=(l+r)/2; push(id); return max(get(id*2,l,m,x,y),get(id*2+1,m+1,r,x,y)); } int get(int l,int r) { //cout<<"get: "<<l<<' '<<r<<'\n'; return get(1,1,n,l,r); } }T; die_hard_onimai_fan { cin>>n; FOR(i,1,n) { cin>>h[i]>>l[i]>>r[i]; if(i+l[i]<=n)H[i+l[i]].pb(i); if(i+r[i]+1<=n)H[i+r[i]+1].pb(i); } cin>>q; FOR(i,1,q) { int l,r; cin>>l>>r; ans[i]=-1; Q[r].pb({l,i}); } T.build(1,1,n); // FOR(i,1,4*n)cout<<T.ans[i]<<' '; // cout<<'\n'; FOR(i,1,n) { for(int id:H[i])T.toggle(id); T.up(i-r[i],i-l[i],h[i]); for(auto&&[l,id]:Q[i])ans[id]=T.get(l,i); } FOR(i,1,q)cout<<ans[i]<<'\n'; } __sumairu__ { FAST file("cum"); int tt=1;//cin>>tt; while(tt--)seggs(); cerr<<"\nTime elapsed: "<<TIME<<" s.\n"; } /** 5 10 2 4 1 1 1 2 1 3 1 1 1 100 1 1 5 1 2 2 3 1 3 1 4 1 5 */

Compilation message (stderr)

antennas.cpp:57:21: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   57 | #define __sumairu__ main()
      |                     ^~~~
antennas.cpp:224:1: note: in expansion of macro '__sumairu__'
  224 | __sumairu__
      | ^~~~~~~~~~~
antennas.cpp: In function 'int main()':
antennas.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);}
      |                                              ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
antennas.cpp:227:5: note: in expansion of macro 'file'
  227 |     file("cum");
      |     ^~~~
antennas.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);}
      |                                                                            ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
antennas.cpp:227:5: note: in expansion of macro 'file'
  227 |     file("cum");
      |     ^~~~
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