Submission #207666

#	Time	Username	Problem	Language	Result	Execution time	Memory
207666		Sho10	Rectangles (IOI19_rect)	C++14	50 / 100	5100 ms	443896 KiB

rect

/*
ID: Sho10
LANG: C++
*/
#include <bits/stdc++.h> //Andrei Alexandru a.k.a Sho10
#define ll long long int
#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#define all(a) (a).begin(), (a).end()
#define sz size
#define f first
#define s second
#define pb push_back
#define er erase
#define in insert
#define mp make_pair
#define pi pair
#define rc(s) return cout<<s,0
#define endl '\n'
#define mod 1000000007
#define PI 3.14159265359
#define CODE_START  ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
using namespace std;
ll a[2505][2505];
ll count_rectangles(vector<vector<int> >A){
ll n=A.size();
ll m=A[0].size();
ll ans=0;
ll s1=-1;
for(ll i=0;i<n;i++)
    for(ll j=0;j<m;j++){
    a[i][j]=A[i][j];
    if(a[i][j]>=2){
        s1=1;
    }
    }
    if(s1==1){
for(ll i=1;i<n-1;i++)
    for(ll j=1;j<m-1;j++)
{
    for(ll c=i;c<n-1;c++)
        for(ll k=j;k<m-1;k++){
           for(ll ii=i;ii<=c;ii++)
           for(ll jj=j;jj<=k;jj++)
           {
               if(a[ii][jj]<a[ii][j-1]&&a[ii][jj]<a[i-1][jj]&&a[ii][jj]<a[c+1][jj]&&a[ii][jj]<a[ii][k+1]){
                continue;
               }else goto Next;
           }
           ans++;
           Next:ans=ans+0;
        }
}
    }else {
    for(ll i=0;i<n;i++)
        for(ll j=0;j<m;j++)
        a[i+1][j+1]=A[i][j];
    ll s[2505][2505];
    for(ll i=1;i<=n;i++)
        for(ll j=1;j<=m;j++)
        s[i][j]=s[i-1][j]+s[i][j-1]-s[i-1][j-1]+a[i][j];
    ll l[2505][2505][3];
    ll r[2505][2505][3];
    for(ll i=n;i>=1;i--)
        for(ll j=m;j>=1;j--)
    {
        ll x=a[i][j];
        l[i][j][x]=l[i+1][j][x]+1;
        r[i][j][x]=r[i][j+1][x]+1;
    }
    for(ll i=2;i<n;i++)
        for(ll j=2;j<m;j++)
    {
        if(a[i][j]==1)continue;
    ll x,y;
    x=i+l[i][j][0]-1;
    y=j+r[i][j][0]-1;
    ll val=s[x][y]+s[i-1][j-1]-s[x][j-1]-s[i-1][y];
    if(val!=0){
        continue;
    }
    if(l[i][j-1][1]<l[i][j][0]) continue;
    if(r[i-1][j][1]<r[i][j][0]) continue;
    if(l[i][y+1][1]<l[i][j][0]) continue;
    if(r[x+1][j][1]<r[i][j][0]) continue;
    ans++;
    }
    }
return ans;
}
/*
int32_t main(){
CODE_START;
cout<<count_rectangles({{1, 1, 1, 1, 1},{0, 0, 0, 0, 0},{1, 0, 1, 1, 1},{1, 1, 1, 1, 1},{1, 1, 1, 1, 1},{1, 1, 1, 1, 1}});
}
*/

Compilation message (stderr)

rect.cpp: In function 'long long int count_rectangles(std::vector<std::vector<int> >)':
rect.cpp:30:1: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
 for(ll i=0;i<n;i++)
 ^~~
rect.cpp:37:5: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
     if(s1==1){
     ^~

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