Submission #118155

#TimeUsernameProblemLanguageResultExecution timeMemory
118155scanhexExamination (JOI19_examination)C++17
0 / 100
592 ms34172 KiB
#include <bits/stdc++.h> using namespace std; using nagai = long long; #define sz(x) int((x).size()) bool act=false; struct fen{ vector<int>v; vector<int>t; void add1(int x,int y){ for(;x<t.size();x+=x&-x) t[x]+=y; } int get(int x){ if(!act)return 0; int ans=0; for(;x;x-=x&-x) ans+=t[x]; return ans; } void add(int x,int y){ if(!act) return v.push_back(x); x=lower_bound(v.begin(),v.end(),x)-v.begin(); add1(x+1,y); } int get(int l,int r){ l=lower_bound(v.begin(),v.end(),l)-v.begin(); r=lower_bound(v.begin(),v.end(),r)-v.begin(); return get(r)-get(l); } }; const int N=100100; //const int oo=0x3f3f3f3f; struct FEN{ fen kek[N]; // vector<int>v; void add1(int x,int y,int z){ for(;x<N;x+=x&-x) kek[x].add(y,z); } int get(int x,int y1,int y2){ int ans=0; for(;x;x-=x&-x) ans+=kek[x].get(y1,y2); return ans; } void add(int x,int y,int z){ // if(!act) // return v.push_back(x); // x=lower_bound(v.begin(),v.end(),x)-v.begin(); add1(x+1,y,z); } int get(int x1,int x2,int y1,int y2){ // x1=lower_bound(v.begin(),v.end(),x1)-v.begin(); // x2=lower_bound(v.begin(),v.end(),x2)-v.begin(); return get(x2,y1,y2)-get(x1,y1,y2); } void init(){ //sort(v.begin(),v.end()); for(int i=0;i<N;++i){ kek[i].v.push_back(1e9); sort(kek[i].v.begin(),kek[i].v.end()); kek[i].t.resize(kek[i].v.size()+1); } act=true; } } F; int n,q; int xs[N],ys[N]; int as[N],bs[N],cs[N]; struct ev{ int x,y1,y2,z1,z2,id; bool operator <(ev o)const { if(x!=o.x) return x>o.x; return id<o.id; } }; int main(){ ios::sync_with_stdio(false); cin.tie(0); cin>>n>>q; for(int i=0;i<n;++i){ cin>>xs[i]>>ys[i]; } for(int i=0;i<q;++i){ cin>>as[i]>>bs[i]>>cs[i]; } vector<int>ans(q); for(int i=0;i<2;++i){ vector<ev>evs; for(int i=0;i<n;++i) evs.push_back({xs[i],ys[i],ys[i],xs[i]+ys[i],xs[i]+ys[i],-1}); for(int i=0;i<q;++i){ evs.push_back({as[i],bs[i],N-3,cs[i],N-3,i}); } sort(evs.begin(),evs.end()); for(auto e:evs){ if(e.id==-1){ F.add(e.y1,e.z1,1); continue; } ans[e.id]=F.get(e.y1,e.y2,e.z1,e.z2); } F.init(); } for(int i=0;i<q;++i) cout<<ans[i]<<'\n'; return 0; }

Compilation message (stderr)

examination.cpp: In member function 'void fen::add1(int, int)':
examination.cpp:13:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(;x<t.size();x+=x&-x)
        ~^~~~~~~~~
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