이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include "rect.h"
#include<bits/stdc++.h>
#define TASKNAME "codeforce"
#define pb push_back
#define pli pair<ll,ll>
#define fi first
#define se second
#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL);
using namespace std;
using ll=long long;
const ll maxN=2500+10;
const ll inf=1e18;
const ll mod=1e9+7;
vector<int>dq[maxN];
vector<ll>vec[maxN];
ll bit[maxN][maxN];
void update(ll t,ll i,ll v)
{
while(i<=t)
{
bit[t][i]+=v;
i+=i&(-i);
}
}
ll get(ll t,ll i)
{
ll aa=0;
while(i>0)
{
aa+=bit[t][i];
i-=i&(-i);
}
return aa;
}
struct qq
{
ll x,y,en;
};
vector<qq>in[maxN];
ll count_rectangles(vector<vector<int>> a)
{
ll n=a.size();
ll m=a[0].size();
for(int i=0;i<n;i++)
{
dq[i].pb(0);
}
for(int j=1;j<m;j++)
{
for(int i=0;i<n;i++)
{
while(dq[i].size()>0&&a[i][j]>a[i][dq[i].back()])
{
if(dq[i].back()<=j-2) vec[dq[i].back()+1].pb(i);
dq[i].pop_back();
}
if(dq[i].size())
{
if(dq[i].back()<=j-2) vec[dq[i].back()+1].pb(i);
if(a[i][j]==a[i][dq[i].back()]) dq[i].pop_back();
}
dq[i].pb(j);
}
for(int i=0;i<j;i++)
{
ll l;
for(int k=0;k<vec[i].size();k++)
{
if(k==0)
{
l=vec[i][k];
}
else if(vec[i][k]>vec[i][k-1]+1)
{
in[l].pb({i,j-1,vec[i][k-1]});
l=vec[i][k];
}
}
if(vec[i].size()>0) in[l].pb({i,j-1,vec[i].back()});
vec[i].clear();
}
}
for(int i=0;i<m;i++)
{
dq[i].clear();
dq[i].pb(0);
}
vector<pair<ll,qq>>tap,cc;
ll ans=0;
for(int i=1;i<n;i++)
{
for(auto zz:in[i-1])
{
tap.pb({i-1,zz});
}
cc.clear();
for(auto zz:tap)
{
if(zz.se.en>=i-1) cc.pb(zz);
}
swap(tap,cc);
for(int j=0;j<m;j++)
{
while(dq[j].size()>0&&a[i][j]>a[dq[j].back()][j])
{
if(dq[j].back()+1<=i-1) vec[dq[j].back()+1].pb(j);
dq[j].pop_back();
}
if(dq[j].size()>0)
{
if(dq[j].back()+1<=i-1) vec[dq[j].back()+1].pb(j);
if(a[dq[j].back()][j]==a[i][j]) dq[j].pop_back();
}
dq[j].pb(i);
}
ll q=0;
for(int j=0;j<i;j++)
{
ll l;
while(q<tap.size()&&tap[q].fi<=j)
{
update(tap[q].se.y,tap[q].se.x,1);
q++;
}
for(int k=0;k<vec[j].size();k++)
{
if(k==0)
{
l=vec[j][k];
}
else if(vec[j][k]>vec[j][k-1]+1)
{
l=vec[j][k];
}
ans+=get(vec[j][k],vec[j][k])-get(vec[j][k],l-1);
}
vec[j].clear();
}
q--;
while(q>=0)
{
update(tap[q].se.y,tap[q].se.x,-1);
q--;
}
}
return ans;
}
/*void solve()
{
cout << count_rectangles({{4, 8, 7, 5, 6},
{7, 4, 10, 3, 5},
{9, 7, 20, 14, 2},
{9, 14, 7, 3, 6},
{5, 7, 5, 2, 7},
{4, 5, 13, 5, 6}});
}
int main()
{
fastio
//freopen(TASKNAME".INP","r",stdin);
//freopen(TASKNAME".OUT","w",stdout);
solve();
}*/
컴파일 시 표준 에러 (stderr) 메시지
rect.cpp: In function 'll count_rectangles(std::vector<std::vector<int> >)':
rect.cpp:67:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
67 | for(int k=0;k<vec[i].size();k++)
| ~^~~~~~~~~~~~~~
rect.cpp:122:20: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<std::pair<long long int, qq> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
122 | while(q<tap.size()&&tap[q].fi<=j)
| ~^~~~~~~~~~~
rect.cpp:127:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
127 | for(int k=0;k<vec[j].size();k++)
| ~^~~~~~~~~~~~~~
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