제출 #914405

#제출 시각아이디문제언어결과실행 시간메모리
914405guagua0407Examination (JOI19_examination)C++17
100 / 100
368 ms11300 KiB
//#pragma GCC optimize("O3") #include <bits/stdc++.h> using namespace std; #define ll long long #define pii pair<int,int> #define f first #define s second #define all(x) x.begin(),x.end() #define _ ios::sync_with_stdio(0); cin.tie(0); cout.tie(0); int dx[4]={0,0,1,-1}; int dy[4]={1,-1,0,0}; void setIO(string s) { freopen((s + ".in").c_str(), "r", stdin); freopen((s + ".out").c_str(), "w", stdout); } struct node{ int x,y,z,id; bool operator<(const node &a)const{ if(x!=a.x) return x<a.x; if(y!=a.y) return y<a.y; if(z!=a.z) return z<a.z; return a.id<id; } }; vector<node>vec; const int mxn=2e5+5; int ans[mxn]; int bit[mxn]; void update(int pos,int val){ for(;pos<mxn;pos+=(pos&-pos)){ bit[pos]+=val; } } int query(int pos){ int ans=0; for(;pos;pos-=(pos&-pos)){ ans+=bit[pos]; } return ans; } bool comp(node a,node b){ return a.y<b.y; } void go(int l,int r){ if(l==r){ return; } int mid=(l+r)/2; go(l,mid); go(mid+1,r); int R=r; for(int L=mid;L>=l;L--){ while(R>mid and vec[R].y>=vec[L].y){ if(vec[R].id==-1){ update(vec[R].z,1); } R--; } if(vec[L].id!=-1){ ans[vec[L].id]+=query(mxn-1)-query(vec[L].z-1); } } R++; while(R<=r){ if(vec[R].id==-1){ update(vec[R].z,-1); } R++; } sort(vec.begin()+l,vec.begin()+r+1,comp); } int main() {_ int n,m; cin>>n>>m; vec.resize(n+m); for(int i=0;i<n;i++){ cin>>vec[i].x>>vec[i].y; vec[i].z=vec[i].x+vec[i].y; vec[i].id=-1; } for(int i=n;i<n+m;i++){ cin>>vec[i].x>>vec[i].y>>vec[i].z; vec[i].id=i-n; } vector<int> zs; zs.push_back(-1); for(int i=0;i<n+m;i++){ zs.push_back(vec[i].z); } sort(all(zs)); zs.resize(unique(all(zs))-zs.begin()); for(int i=0;i<n+m;i++){ vec[i].z=lower_bound(all(zs),vec[i].z)-zs.begin(); } sort(all(vec)); go(0,n+m-1); for(int i=0;i<m;i++){ cout<<ans[i]<<'\n'; } return 0; } //maybe its multiset not set //yeeorz //laborz

컴파일 시 표준 에러 (stderr) 메시지

examination.cpp: In function 'void setIO(std::string)':
examination.cpp:15:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
examination.cpp:16:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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