oj.uz

Submission #39233

# Submission time Handle Problem Language Result Execution time Memory
39233 2018-01-10T11:14:10 Z yerkimbekov Bomb (IZhO17_bomb) C++14
21 / 100
 1000 ms 51200 KB 
#include <bits/stdc++.h>
using namespace std;
 
int m,n,res=0,a[2505][2505],F[2505][2505];
 
int Suma(int u1,int v1,int u2,int v2)
{
    return a[u2][v2]-a[u1-1][v2]-a[u2][v1-1]+a[u1-1][v1-1];
}
 
int SumF(int u1,int v1,int u2,int v2)
{
    return F[u2][v2]-F[u1-1][v2]-F[u2][v1-1]+F[u1-1][v1-1];
}
 
bool Check(int mm,int nn)
{
    for(int i=1;i<=m;i++)
        for(int j=1;j<=n;j++)
            F[i][j]=0;
    for(int i=1;i<=m;i++)
        for(int j=1;j<=n;j++)
        {
            F[i][j]=F[i-1][j]+F[i][j-1]-F[i-1][j-1];
            if(i+mm-1<=m&&j+nn-1&&Suma(i,j,i+mm-1,j+nn-1)==mm*nn)
                F[i][j]++;
        }
    for(int i=1;i<=m;i++)
        for(int j=1;j<=n;j++)
            if(Suma(i,j,i,j)==1&&SumF(max(i-mm+1,1),max(j-nn+1,1),i,j)==0)
                return false;
    return true;
}
 
int main()
{
    ios_base::sync_with_stdio(false);
    //freopen("TEST.INP","r",stdin);
    cin>>m>>n;
    char c;
    for(int i=1;i<=m;i++)
        for(int j=1;j<=n;j++)
        {
            cin>>c;
            a[i][j]=a[i-1][j]+a[i][j-1]-a[i-1][j-1]+(c=='1');
        }
    int ll = 1, rr = m;
    while(ll <= rr){
      int i = (ll + rr) >> 1;
      bool tr = 0;
        int l=1,r=n;
        while(l<=r)
        {
            int mid=(l+r)/2;
            if(Check(i,mid)==true)
            {
                tr = 1;
                res=max(res,i*mid);
                l=mid+1;
            }
            else
                r=mid-1;
        }
      if(tr){
        ll = i + 1;
      }else{
        rr = i - 1;
      }
    }
    cout << res;
}

Subtask #1
21.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 51200 KB Output is correct
2 Correct 0 ms 51200 KB Output is correct
3 Correct 9 ms 51200 KB Output is correct
4 Correct 6 ms 51200 KB Output is correct
5 Correct 0 ms 51200 KB Output is correct
6 Correct 0 ms 51200 KB Output is correct
7 Correct 0 ms 51200 KB Output is correct
8 Correct 0 ms 51200 KB Output is correct
9 Incorrect 0 ms 51200 KB Output isn't correct
10 Correct 0 ms 51200 KB Output is correct
11 Incorrect 0 ms 51200 KB Output isn't correct
12 Correct 0 ms 51200 KB Output is correct
13 Correct 0 ms 51200 KB Output is correct
14 Correct 0 ms 51200 KB Output is correct
15 Incorrect 0 ms 51200 KB Output isn't correct
16 Correct 0 ms 51200 KB Output is correct
17 Correct 0 ms 51200 KB Output is correct
18 Incorrect 0 ms 51200 KB Output isn't correct
19 Incorrect 0 ms 51200 KB Output isn't correct
20 Incorrect 3 ms 51200 KB Output isn't correct
21 Correct 0 ms 51200 KB Output is correct
22 Correct 3 ms 51200 KB Output is correct
23 Incorrect 3 ms 51200 KB Output isn't correct
24 Incorrect 0 ms 51200 KB Output isn't correct
25 Incorrect 3 ms 51200 KB Output isn't correct
26 Correct 0 ms 51200 KB Output is correct
27 Correct 23 ms 51200 KB Output is correct
28 Correct 39 ms 51200 KB Output is correct
29 Incorrect 53 ms 51200 KB Output isn't correct
30 Incorrect 73 ms 51200 KB Output isn't correct
31 Incorrect 49 ms 51200 KB Output isn't correct
32 Incorrect 56 ms 51200 KB Output isn't correct
33 Incorrect 63 ms 51200 KB Output isn't correct
34 Incorrect 23 ms 51200 KB Output isn't correct
35 Incorrect 69 ms 51200 KB Output isn't correct
36 Correct 93 ms 51200 KB Output is correct
37 Incorrect 0 ms 51200 KB Output isn't correct
38 Execution timed out 1000 ms 51200 KB Execution timed out
39 Incorrect 0 ms 51200 KB Output isn't correct
40 Incorrect 439 ms 51200 KB Output isn't correct
41 Correct 0 ms 51200 KB Output is correct
42 Incorrect 0 ms 51200 KB Output isn't correct
43 Execution timed out 1000 ms 51200 KB Execution timed out
44 Incorrect 93 ms 51200 KB Output isn't correct
45 Execution timed out 1000 ms 51200 KB Execution timed out
46 Execution timed out 1000 ms 51200 KB Execution timed out
47 Execution timed out 1000 ms 51200 KB Execution timed out
48 Execution timed out 1000 ms 51200 KB Execution timed out
49 Execution timed out 1000 ms 51200 KB Execution timed out
50 Execution timed out 1000 ms 51200 KB Execution timed out
51 Execution timed out 1000 ms 51200 KB Execution timed out
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