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Submission #35816

# Submission time Handle Problem Language Result Execution time Memory
35816 2017-12-01T01:41:48 Z dqhungdl Bomb (IZhO17_bomb) C++14
32 / 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');
        }
    for(int i=1;i<=m;i++)
    {
        int l=1,r=n;
        while(l<=r)
        {
            int mid=(l+r)/2;
            if(Check(i,mid)==true)
            {
                res=max(res,i*mid);
                l=mid+1;
            }
            else
                r=mid-1;
        }
    }
    cout<<res;
}

Subtask #1
32.0 / 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 306 ms 51200 KB Output is correct
4 Correct 276 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 Correct 0 ms 51200 KB Output is correct
10 Correct 0 ms 51200 KB Output is correct
11 Correct 0 ms 51200 KB Output is 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 Correct 0 ms 51200 KB Output is correct
16 Correct 0 ms 51200 KB Output is correct
17 Correct 6 ms 51200 KB Output is correct
18 Correct 6 ms 51200 KB Output is correct
19 Correct 16 ms 51200 KB Output is correct
20 Correct 16 ms 51200 KB Output is correct
21 Correct 6 ms 51200 KB Output is correct
22 Correct 13 ms 51200 KB Output is correct
23 Correct 29 ms 51200 KB Output is correct
24 Correct 13 ms 51200 KB Output is correct
25 Correct 29 ms 51200 KB Output is correct
26 Correct 29 ms 51200 KB Output is correct
27 Correct 836 ms 51200 KB Output is correct
28 Execution timed out 1000 ms 51200 KB Execution timed out
29 Execution timed out 1000 ms 51200 KB Execution timed out
30 Execution timed out 1000 ms 51200 KB Execution timed out
31 Execution timed out 1000 ms 51200 KB Execution timed out
32 Execution timed out 1000 ms 51200 KB Execution timed out
33 Execution timed out 1000 ms 51200 KB Execution timed out
34 Correct 863 ms 51200 KB Output is correct
35 Execution timed out 1000 ms 51200 KB Execution timed out
36 Execution timed out 1000 ms 51200 KB Execution timed out
37 Correct 0 ms 51200 KB Output is correct
38 Execution timed out 1000 ms 51200 KB Execution timed out
39 Correct 0 ms 51200 KB Output is correct
40 Execution timed out 1000 ms 51200 KB Execution timed out
41 Correct 0 ms 51200 KB Output is correct
42 Correct 33 ms 51200 KB Output is correct
43 Execution timed out 1000 ms 51200 KB Execution timed out
44 Execution timed out 1000 ms 51200 KB Execution timed out
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
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80 Execution timed out 1000 ms 51200 KB Execution timed out
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100 Execution timed out 1000 ms 51200 KB Execution timed out