Submission #145437

#	Time	Username	Problem	Language	Result	Execution time	Memory
145437		MvC	Rectangles (IOI19_rect)	C++14	49 / 100	2271 ms	76940 KiB

rect

#include "rect.h"
#pragma GCC target("avx2")
#pragma GCC optimization("O3")
#pragma GCC optimization("unroll-loops")
#include<bits/stdc++.h>
#define rc(x) return cout<<x<<endl,0
#define pb push_back
#define mkp make_pair
#define in insert
#define er erase
#define fd find
#define fr first
#define sc second
typedef long long ll;
typedef long double ld;
const ll INF=0x3f3f3f3f3f3f3f3f;
const ll llinf=(1LL<<62);
const int inf=(1<<30);
const int nmax=7e2+5;
const int mod=1e9+7;
using namespace std;
int n,m,a[nmax][nmax],i,j,t,x,y,rs;
vector<pair<int,int> >pr[nmax];
vector<int>vc[nmax][nmax],st;
bitset<nmax>bs,b[nmax][nmax];
ll count_rectangles(vector<vector<int> > A)
{
	n=A.size(),m=A[0].size();
	for(i=1;i<=n;i++)for(j=1;j<=m;j++)a[i][j]=A[i-1][j-1];
	for(i=1;i<=n;i++)
	{
		st.clear();
		for(j=1;j<=m;j++)
		{
			while(!st.empty() && a[i][st.back()]<a[i][j])
			{
				
				if(st.back()+1<j)
				{
					pr[i].pb(mkp(st.back(),j));
					vc[st.back()][j].pb(i);
				}
				st.pop_back();
			}
			if(!st.empty() && st.back()+1<j)
			{
				pr[i].pb(mkp(st.back(),j));
				vc[st.back()][j].pb(i);
			}
			while(!st.empty() && a[i][st.back()]==a[i][j])st.pop_back();
			st.pb(j);
		}
	}
	for(i=1;i<=m;i++)
	{
		st.clear();
		for(j=n;j>=1;j--)
		{
			while(!st.empty() && a[st.back()][i]<a[j][i])
			{
				if(st.back()>j+1)b[j][i][st.back()]=1;
				st.pop_back();
			}
			if(!st.empty() && st.back()>j+1)b[j][i][st.back()]=1;
			while(!st.empty() && a[st.back()][i]==a[j][i])st.pop_back();
			st.pb(j);
		}
	}
	for(i=1;i<=n;i++)
	{
		for(j=0;j<pr[i].size();j++)
		{
			x=pr[i][j].fr,y=pr[i][j].sc;
			bs.set();
			for(t=x+1;t<=y-1;t++)
			{
				bs&=b[i-1][t];
			}
			for(t=0;t<vc[x][y].size();t++)if(vc[x][y][t]==i)break;
			for(;t<vc[x][y].size();t++)
			{
				if(vc[x][y][t]!=i && vc[x][y][t]!=vc[x][y][t-1]+1)break;
				rs+=bs[vc[x][y][t]+1];
			}
		}
	}
	return rs;
}

Compilation message (stderr)

rect.cpp:3:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
 #pragma GCC optimization("O3")
 
rect.cpp:4:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
 #pragma GCC optimization("unroll-loops")
 
rect.cpp: In function 'll count_rectangles(std::vector<std::vector<int> >)':
rect.cpp:71:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(j=0;j<pr[i].size();j++)
           ~^~~~~~~~~~~~~
rect.cpp:79:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(t=0;t<vc[x][y].size();t++)if(vc[x][y][t]==i)break;
            ~^~~~~~~~~~~~~~~~
rect.cpp:80:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(;t<vc[x][y].size();t++)
         ~^~~~~~~~~~~~~~~~

• Subtask 1: 8 / 8
• Subtask 2: 7 / 7
• Subtask 3: 12 / 12
• Subtask 4: 22 / 22
• Subtask 5: 0 / 10
• Subtask 6: 0 / 13
• Subtask 7: 0 / 28