Submission #1083599

#TimeUsernameProblemLanguageResultExecution timeMemory
1083599hahahahaTwo Antennas (JOI19_antennas)C++17
100 / 100
271 ms39012 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]; #define ll int struct seg { ll ans[N*4], Max[N*4], Min[N*4], lmx[N*4], lmn[N*4]; void build(ll i, ll Start, ll End) { lmx[i]=Max[i]=-1, lmn[i]=Min[i]=inf, ans[i]=-1; if (Start==End) return; ll mid=(Start+End)/2; build(i*2, Start, mid); build(i*2+1, mid+1, End); } void Move(ll i) { if (lmx[i]>-1) { ll t=lmx[i]; lmx[i]=-1; lmx[i*2]=max(lmx[i*2], t); ans[i*2]=max(ans[i*2], t-Min[i*2]); lmx[i*2+1]=max(lmx[i*2+1], t); ans[i*2+1]=max(ans[i*2+1], t-Min[i*2+1]); } if (lmn[i]<inf) { ll t=lmn[i]; lmn[i]=inf; lmn[i*2]=min(lmn[i*2], t); ans[i*2]=max(ans[i*2], Max[i*2]-t); lmn[i*2+1]=min(lmn[i*2+1], t); ans[i*2+1]=max(ans[i*2+1], Max[i*2+1]-t); } } void toggle(ll i, ll Start, ll End, ll idx) { if (Start>idx || End<idx) return; if (Start==End) { if (Max[i]>=0) Max[i]=-1, Min[i]=inf; else Max[i]=Min[i]=h[Start]; return; } ll mid=(Start+End)/2; Move(i); if (idx<=mid) toggle(i*2, Start, mid, idx); else toggle(i*2+1, mid+1, End, idx); Max[i]=max(Max[i*2], Max[i*2+1]); Min[i]=min(Min[i*2], Min[i*2+1]); } void toggle(ll idx) { // cout << "toggle: " << idx << "\n"; toggle(1, 1, n, idx);} void update(ll i, ll Start, ll End, ll l, ll r, ll v) { if (Start>r || End<l) return; if (Start>=l && End<=r) { lmx[i]=max(lmx[i], v), lmn[i]=min(lmn[i], v); ans[i]=max({ans[i], v-Min[i], Max[i]-v}); return; } ll mid=(Start+End)/2; Move(i); if (mid>=l) update(i*2, Start, mid, l, r, v); if (mid+1<=r) update(i*2+1, mid+1, End, l, r, v); ans[i]=max({ans[i], ans[i*2], ans[i*2+1]}); } void update(ll l, ll r, ll v) { // cout << "update: " << l << " " << r << " " << v << "\n"; update(1, 1, n, l, r, v);} ll query(ll i, ll Start, ll End, ll l, ll r) { if (Start>r || End<l) return -1; if (Start>=l && End<=r) return ans[i]; ll mid=(Start+End)/2; Move(i); if (mid<l) return query(i*2+1, mid+1, End, l, r); if (mid+1>r) return query(i*2, Start, mid, l, r); return max(query(i*2, Start, mid, l, r), query(i*2+1, mid+1, End, l, r)); } ll query(ll l, ll r){ // cout << "query: " << l << " " << r << " " << query(1, 1, n, l, r) << "\n"; return query(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.update(i-r[i],i-l[i],h[i]); for(auto&&[l,id]:Q[i])ans[id]=T.query(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:215:1: note: in expansion of macro '__sumairu__'
  215 | __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:218:5: note: in expansion of macro 'file'
  218 |     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:218:5: note: in expansion of macro 'file'
  218 |     file("cum");
      |     ^~~~
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