oj.uz

Submission #1118850

# Submission time Handle Problem Language Result Execution time Memory
1118850 2024-11-26T09:30:41 Z Younis_Dwai Bomb (IZhO17_bomb) C++14
42 / 100
 661 ms 11616 KB 
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
#include <bits/stdc++.h>
#define endl "\n"
#define F first
#define S second
#define pb push_back
//#define int long long
#define in insert
//#define mid (l+r)/2
#define in insert
using namespace std;
const int N=2505;
char b[N][N];
int n,m,pref[505][505],d[505][505];
void init(){
     for(int i=1;i<=n;i++){
         for(int j=1;j<=m;j++){
             pref[i][j]=pref[i-1][j]+pref[i][j-1]-pref[i-1][j-1]+bool(b[i][j]=='1');
         }
     }
     return ;
}
int query(int x , int y , int x1 , int y1){
    return pref[x1][y1]-pref[x1][y-1]-pref[x-1][y1]+pref[x-1][y-1];
}
int Query(int x , int y , int x1 , int y1){
    return d[x1][y1]-d[x1][y-1]-d[x-1][y1]+d[x-1][y-1];
}
bool ok(int h  , int w){
     for(int i=1;i<=n;i++){
         for(int j=1;j<=m;j++){
             d[i][j]=0;
         }
     }
     for(int i=1;i+h-1<=n;i++){
         for(int j=1;j+w-1<=m;j++){
             if(query(i,j,i+h-1,j+w-1)==h*w){
                d[i][j]=1;
             }
         }
     }
     for(int i=1;i<=n;i++){
         for(int j=1;j<=m;j++){
             d[i][j]=d[i-1][j]+d[i][j-1]-d[i-1][j-1]+d[i][j];
         }
     }
     bool can=1;
     for(int i=1;i<=n;i++){
         for(int j=1;j<=m;j++){
             if(b[i][j]=='1'){
                int i1=max(1,i-h+1),j1=max(1,j-w+1);
                if(Query(i1,j1,i,j)==0) can=0;
             }
         }
     }
     return can;
}
int32_t main(){
    ios::sync_with_stdio(false);cin.tie(nullptr);
    cin>>n>>m;
    for(int i=1;i<=n;i++){
        for(int j=1;j<=m;j++){
            cin>>b[i][j];
        }
    }
    if(n<=350 && m<=350 && n!=1 && m!=1){
       int mx=0;
       init();
       for(int i=1;i<=n;i++){
           int l=1,r=n,mid=(l+r+1)/2;
           while(l<r){
                 if(ok(i,mid)) l=mid;
                 else r=mid-1;
                 mid=(l+r+1)/2;
           }
           if(ok(i,mid)) mx=max(mx,i*mid);
       }
       cout<<mx;
    }
    else{
        int h=n,w=m;
        for(int i=1;i<=n;i++){
            for(int j=1;j<=m;j++){
                if(b[i][j]=='1'){
                   int cnt=1;
                   while(j+1<=m && b[i][j+1]=='1'){
                         ++cnt;
                         ++j;
                   }
                   w=min(w,cnt);
                }
            }
        }
        for(int j=1;j<=m;j++){
            for(int i=1;i<=n;i++){
                if(b[i][j]=='1'){
                   int cnt=1;
                   while(i+1<=n && b[i+1][j]=='1'){
                         ++i;
                         ++cnt;
                   }
                   h=min(h,cnt);
                }
            }
        }
        cout<<h*w;
    }
    return 0;
}

Subtask #1
42.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 592 KB Output is correct
3 Correct 7 ms 6480 KB Output is correct
4 Correct 5 ms 6460 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 2 ms 336 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 2 ms 592 KB Output is correct
9 Correct 1 ms 592 KB Output is correct
10 Correct 1 ms 592 KB Output is correct
11 Correct 1 ms 592 KB Output is correct
12 Correct 1 ms 504 KB Output is correct
13 Correct 1 ms 336 KB Output is correct
14 Correct 2 ms 336 KB Output is correct
15 Correct 1 ms 592 KB Output is correct
16 Correct 2 ms 464 KB Output is correct
17 Correct 6 ms 728 KB Output is correct
18 Correct 5 ms 848 KB Output is correct
19 Correct 10 ms 1084 KB Output is correct
20 Correct 15 ms 848 KB Output is correct
21 Correct 4 ms 732 KB Output is correct
22 Correct 10 ms 848 KB Output is correct
23 Correct 19 ms 1104 KB Output is correct
24 Correct 10 ms 864 KB Output is correct
25 Correct 22 ms 1104 KB Output is correct
26 Correct 27 ms 1132 KB Output is correct
27 Correct 661 ms 2436 KB Output is correct
28 Incorrect 3 ms 1272 KB Output isn't correct
29 Incorrect 3 ms 1568 KB Output isn't correct
30 Incorrect 6 ms 1616 KB Output isn't correct
31 Incorrect 4 ms 1440 KB Output isn't correct
32 Incorrect 3 ms 1616 KB Output isn't correct
33 Incorrect 5 ms 1780 KB Output isn't correct
34 Incorrect 2 ms 1360 KB Output isn't correct
35 Incorrect 4 ms 1616 KB Output isn't correct
36 Correct 6 ms 1616 KB Output is correct
37 Correct 1 ms 592 KB Output is correct
38 Correct 65 ms 9764 KB Output is correct
39 Correct 1 ms 592 KB Output is correct
40 Incorrect 10 ms 3196 KB Output isn't correct
41 Correct 2 ms 760 KB Output is correct
42 Correct 25 ms 1104 KB Output is correct
43 Correct 81 ms 11368 KB Output is correct
44 Incorrect 4 ms 1616 KB Output isn't correct
45 Incorrect 92 ms 9688 KB Output isn't correct
46 Correct 92 ms 9912 KB Output is correct
47 Incorrect 83 ms 9772 KB Output isn't correct
48 Incorrect 83 ms 11328 KB Output isn't correct
49 Correct 91 ms 11396 KB Output is correct
50 Incorrect 70 ms 11368 KB Output isn't correct
51 Incorrect 69 ms 11336 KB Output isn't correct
52 Incorrect 78 ms 9876 KB Output isn't correct
53 Incorrect 91 ms 9864 KB Output isn't correct
54 Incorrect 69 ms 11268 KB Output isn't correct
55 Incorrect 89 ms 11616 KB Output isn't correct
56 Correct 111 ms 9916 KB Output is correct
57 Incorrect 94 ms 11452 KB Output isn't correct
58 Incorrect 133 ms 11432 KB Output isn't correct
59 Incorrect 93 ms 9784 KB Output isn't correct
60 Correct 71 ms 9736 KB Output is correct
61 Correct 121 ms 11240 KB Output is correct
62 Correct 80 ms 11336 KB Output is correct
63 Correct 87 ms 9912 KB Output is correct
64 Correct 133 ms 9800 KB Output is correct
65 Incorrect 103 ms 9868 KB Output isn't correct
66 Incorrect 76 ms 11336 KB Output isn't correct
67 Incorrect 96 ms 9700 KB Output isn't correct
68 Incorrect 101 ms 11408 KB Output isn't correct
69 Incorrect 116 ms 9868 KB Output isn't correct
70 Incorrect 48 ms 8592 KB Output isn't correct
71 Incorrect 78 ms 9916 KB Output isn't correct
72 Incorrect 102 ms 9772 KB Output isn't correct
73 Incorrect 95 ms 11592 KB Output isn't correct
74 Incorrect 90 ms 11336 KB Output isn't correct
75 Incorrect 101 ms 11432 KB Output isn't correct
76 Incorrect 89 ms 9920 KB Output isn't correct
77 Incorrect 132 ms 11444 KB Output isn't correct
78 Incorrect 102 ms 11216 KB Output isn't correct
79 Incorrect 95 ms 9860 KB Output isn't correct
80 Incorrect 83 ms 11284 KB Output isn't correct
81 Incorrect 76 ms 9916 KB Output isn't correct
82 Incorrect 69 ms 11452 KB Output isn't correct
83 Incorrect 99 ms 11368 KB Output isn't correct
84 Incorrect 79 ms 9800 KB Output isn't correct
85 Incorrect 73 ms 9900 KB Output isn't correct
86 Incorrect 71 ms 9792 KB Output isn't correct
87 Incorrect 118 ms 9888 KB Output isn't correct
88 Incorrect 85 ms 11216 KB Output isn't correct
89 Incorrect 86 ms 9704 KB Output isn't correct
90 Incorrect 46 ms 7496 KB Output isn't correct
91 Incorrect 84 ms 9764 KB Output isn't correct
92 Incorrect 69 ms 11356 KB Output isn't correct
93 Incorrect 87 ms 9920 KB Output isn't correct
94 Incorrect 113 ms 9812 KB Output isn't correct
95 Incorrect 94 ms 11288 KB Output isn't correct
96 Incorrect 95 ms 11308 KB Output isn't correct
97 Incorrect 74 ms 9760 KB Output isn't correct
98 Incorrect 92 ms 11408 KB Output isn't correct
99 Incorrect 78 ms 9832 KB Output isn't correct
100 Incorrect 79 ms 11608 KB Output isn't correct