제출 #299049

#제출 시각아이디문제언어결과실행 시간메모리
299049TMJNRectangles (IOI19_rect)C++17
0 / 100
5080 ms410636 KiB
#include <bits/stdc++.h> #include "rect.h" using namespace std; int tree[1<<13][1<<13]; bool b[2500][2500]; set<int>sth[2500],stw[2500]; vector<pair<int,pair<int,int>>>p; int H,W,res; int calc(int xl,int xr,int yl,int yr){ int a=0; xl+=(1<<12); xr+=(1<<12); yl+=(1<<12); yr+=(1<<12); int YL=yl,YR=yr; while(xl<xr){ if(xl&1){ yl=YL; yr=YR; while(yl<yr){ if(yl&1){ a+=tree[xl][yl]; } if(~yr&1){ a+=tree[xl][yr]; } yl=(yl+1)/2; yr=(yr-1)/2; } if(yl==yr){ a+=tree[xl][yl]; } } if(~xr&1){ yl=YL; yr=YR; while(yl<yr){ if(yl&1){ a+=tree[xr][yl]; } if(~yr&1){ a+=tree[xr][yr]; } yl=(yl+1)/2; yr=(yr-1)/2; } if(yl==yr){ a+=tree[xr][yl]; } } xl=(xl+1)/2; xr=(xr-1)/2; } if(xl==xr){ yl=YL; yr=YR; while(yl<yr){ if(yl&1){ a+=tree[xl][yl]; } if(~yr&1){ a+=tree[xl][yr]; } yl=(yl+1)/2; yr=(yr-1)/2; } if(yl==yr){ a+=tree[xl][yl]; } } return a; } void add(int x,int y){ b[x][y]=true; x+=(1<<12); y+=(1<<12); int Y=y; while(x){ y=Y; while(y){ // cout<<"!"<<x<<' '<<y<<endl; tree[x][y]++; y/=2; } x/=2; } } long long count_rectangles(vector<vector<int>>a){ H=a.size(); W=a[0].size(); for(int i=0;i<H;i++){ for(int j=0;j<W;j++){ p.push_back({a[i][j],{i,j}}); } } p.push_back({0xE869120,{-1,-1}}); sort(p.begin(),p.end()); for(int i=0;i<H;i++){ for(int j=-1;j<=W;j++){ sth[i].insert(j); } } for(int i=0;i<W;i++){ for(int j=-1;j<=H;j++){ stw[i].insert(j); } } for(int i=0;i<p.size()-1;i++){ if(i&&p[i-1].first==p[i].first)continue; for(int j=i;p[i].first==p[j].first;j++){ add(p[j].second.first,p[j].second.second); sth[p[j].second.first].erase(p[j].second.second); stw[p[j].second.second].erase(p[j].second.first); } vector<pair<pair<int,int>,pair<int,int>>>pp; for(int j=i;p[i].first==p[j].first;j++){ int lx,rx,ly,ry; auto it=sth[p[j].second.first].lower_bound(p[j].second.second); ry=*it; it--; ly=*it; auto it2=stw[p[j].second.second].lower_bound(p[j].second.first); rx=*it2; it2--; lx=*it2; lx++; rx--; ly++; ry--; if(lx<=0||ly<=0||H-1<=rx||W-1<=ry)continue; if(calc(lx-1,rx+1,ly-1,ry+1)==calc(lx,rx,ly,ry)+b[lx-1][ly-1]+b[lx-1][ry+1]+b[rx+1][ly-1]+b[rx+1][ry+1]){ pp.push_back({{lx,rx},{ly,ry}}); // cout<<"!!!"<<lx<<' '<<rx<<' '<<' '<<ly<<' '<<ry<<endl; } // cout<<p[i].first<<' '<<j<<" "<<lx<<' '<<rx<<" "<<ly<<' '<<ry<<' '<<calc(lx,rx,ly,ry)<<' '<<calc(lx-1,rx+1,ly-1,ry+1)<<' '<<b[lx-1][ly-1]+b[lx-1][ry+1]+b[rx+1][ly-1]+b[rx+1][ry+1]<<endl; } sort(pp.begin(),pp.end()); pp.erase(unique(pp.begin(),pp.end()),pp.end()); res+=pp.size(); } return res; }

컴파일 시 표준 에러 (stderr) 메시지

rect.cpp: In function 'long long int count_rectangles(std::vector<std::vector<int> >)':
rect.cpp:112:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  112 |  for(int i=0;i<p.size()-1;i++){
      |              ~^~~~~~~~~~~
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