oj.uz

Submission #936112

# Submission time Handle Problem Language Result Execution time Memory
936112 2024-03-01T07:02:31 Z guagua0407 Bomb (IZhO17_bomb) C++17
40 / 100
 1000 ms 43700 KB 
#pragma GCC optimize("O3")
#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define f first
#define s second
#define all(x) x.begin(),x.end()

const int mxn=2505;
char c[mxn][mxn];
int pre[mxn][mxn];
bool used[mxn][mxn];
int mn[mxn];
int n,m;

bool check(int x,int y){
    for(int i=1;i<=n;i++){
        for(int j=1;j<=m;j++){
            used[i][j]=false;
        }
    }
    for(int j=1;j<=m;j++){
        mn[j]=0;
    }
    int cur=0;
    for(int i=y;i<=n;i++){
        int prv=0;
        for(int j=x;j<=m;j++){
            int sum=pre[i][j]-pre[i][j-x]-pre[i-y][j]+pre[i-y][j-x];
            if(sum!=x*y){
                continue;
            }
            for(int k=max(prv+1,j-x+1);k<=j;k++){
                for(int l=i;l>=max(mn[k]+1,i-y+1);l--){
                    used[l][k]=true;
                    cur++;
                }
                mn[k]=i;
            }
            prv=j;
        }
    }
    return cur==pre[n][m];
}

int main(){
    ios::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    auto st=clock();
    cin>>n>>m;
    for(int i=1;i<=n;i++){
        for(int j=1;j<=m;j++){
            cin>>c[i][j];
            pre[i][j]=pre[i][j-1]+pre[i-1][j]-pre[i-1][j-1]+(c[i][j]=='1');
        }
    }
    int ans=1;
    set<int> S;
    for(int len=m;len>=1;len--){
        int r=(ans+len-1)/len;
        while(r<=n and check(len,r)){
            r++;
        }
        S.insert(r);
        ans=max(ans,len*(r-1));
    }
    assert(S.size()<100);
    cout<<ans<<'\n';
}

Compilation message

bomb.cpp: In function 'int main()':
bomb.cpp:49:10: warning: unused variable 'st' [-Wunused-variable]
   49 |     auto st=clock();
      |          ^~

Subtask #1
40.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2520 KB Output is correct
3 Correct 12 ms 23640 KB Output is correct
4 Correct 11 ms 23644 KB Output is correct
5 Correct 8 ms 2548 KB Output is correct
6 Correct 3 ms 2392 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2648 KB Output is correct
9 Correct 1 ms 2816 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2652 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2512 KB Output is correct
16 Correct 1 ms 2524 KB Output is correct
17 Correct 1 ms 2908 KB Output is correct
18 Correct 1 ms 4956 KB Output is correct
19 Correct 2 ms 4956 KB Output is correct
20 Correct 2 ms 4956 KB Output is correct
21 Correct 1 ms 2652 KB Output is correct
22 Correct 1 ms 4956 KB Output is correct
23 Correct 2 ms 4956 KB Output is correct
24 Correct 1 ms 4956 KB Output is correct
25 Correct 2 ms 4956 KB Output is correct
26 Correct 6 ms 5196 KB Output is correct
27 Correct 63 ms 8280 KB Output is correct
28 Correct 30 ms 8420 KB Output is correct
29 Correct 107 ms 8792 KB Output is correct
30 Correct 81 ms 9436 KB Output is correct
31 Correct 58 ms 8796 KB Output is correct
32 Correct 47 ms 9052 KB Output is correct
33 Correct 88 ms 11356 KB Output is correct
34 Correct 19 ms 8540 KB Output is correct
35 Correct 65 ms 11548 KB Output is correct
36 Correct 466 ms 11536 KB Output is correct
37 Correct 1 ms 2652 KB Output is correct
38 Execution timed out 1016 ms 43344 KB Time limit exceeded
39 Correct 1 ms 2652 KB Output is correct
40 Execution timed out 1075 ms 14552 KB Time limit exceeded
41 Correct 1 ms 2652 KB Output is correct
42 Correct 3 ms 4952 KB Output is correct
43 Execution timed out 1084 ms 43252 KB Time limit exceeded
44 Runtime error 164 ms 22864 KB Execution killed with signal 6
45 Execution timed out 1026 ms 43116 KB Time limit exceeded
46 Execution timed out 1050 ms 43384 KB Time limit exceeded
47 Execution timed out 1063 ms 43256 KB Time limit exceeded
48 Execution timed out 1103 ms 43236 KB Time limit exceeded
49 Execution timed out 1044 ms 43284 KB Time limit exceeded
50 Execution timed out 1030 ms 43700 KB Time limit exceeded
51 Execution timed out 1050 ms 43348 KB Time limit exceeded
52 Execution timed out 1063 ms 43144 KB Time limit exceeded
53 Execution timed out 1091 ms 43344 KB Time limit exceeded
54 Execution timed out 1058 ms 43348 KB Time limit exceeded
55 Execution timed out 1012 ms 43156 KB Time limit exceeded
56 Execution timed out 1052 ms 43348 KB Time limit exceeded
57 Execution timed out 1032 ms 43164 KB Time limit exceeded
58 Execution timed out 1010 ms 43284 KB Time limit exceeded
59 Execution timed out 1052 ms 43184 KB Time limit exceeded
60 Execution timed out 1018 ms 43152 KB Time limit exceeded
61 Execution timed out 1025 ms 43204 KB Time limit exceeded
62 Execution timed out 1029 ms 43144 KB Time limit exceeded
63 Execution timed out 1057 ms 43348 KB Time limit exceeded
64 Execution timed out 1016 ms 43344 KB Time limit exceeded
65 Execution timed out 1024 ms 43248 KB Time limit exceeded
66 Execution timed out 1033 ms 43348 KB Time limit exceeded
67 Execution timed out 1036 ms 43196 KB Time limit exceeded
68 Execution timed out 1091 ms 43140 KB Time limit exceeded
69 Execution timed out 1046 ms 43352 KB Time limit exceeded
70 Execution timed out 1055 ms 36440 KB Time limit exceeded
71 Execution timed out 1040 ms 43348 KB Time limit exceeded
72 Execution timed out 1047 ms 43348 KB Time limit exceeded
73 Execution timed out 1025 ms 43256 KB Time limit exceeded
74 Execution timed out 1008 ms 43344 KB Time limit exceeded
75 Execution timed out 1010 ms 43344 KB Time limit exceeded
76 Execution timed out 1008 ms 43120 KB Time limit exceeded
77 Execution timed out 1031 ms 43144 KB Time limit exceeded
78 Execution timed out 1030 ms 43240 KB Time limit exceeded
79 Execution timed out 1014 ms 43268 KB Time limit exceeded
80 Execution timed out 1031 ms 43272 KB Time limit exceeded
81 Execution timed out 1060 ms 43232 KB Time limit exceeded
82 Execution timed out 1026 ms 43256 KB Time limit exceeded
83 Execution timed out 1046 ms 43348 KB Time limit exceeded
84 Execution timed out 1033 ms 43404 KB Time limit exceeded
85 Execution timed out 1030 ms 43348 KB Time limit exceeded
86 Execution timed out 1027 ms 43216 KB Time limit exceeded
87 Execution timed out 1051 ms 43128 KB Time limit exceeded
88 Execution timed out 1066 ms 43348 KB Time limit exceeded
89 Execution timed out 1100 ms 43248 KB Time limit exceeded
90 Execution timed out 1043 ms 36480 KB Time limit exceeded
91 Execution timed out 1004 ms 43344 KB Time limit exceeded
92 Execution timed out 1050 ms 43152 KB Time limit exceeded
93 Execution timed out 1066 ms 43348 KB Time limit exceeded
94 Execution timed out 1064 ms 43352 KB Time limit exceeded
95 Execution timed out 1035 ms 43144 KB Time limit exceeded
96 Execution timed out 1059 ms 43240 KB Time limit exceeded
97 Execution timed out 1060 ms 43120 KB Time limit exceeded
98 Execution timed out 1049 ms 43236 KB Time limit exceeded
99 Execution timed out 1049 ms 43348 KB Time limit exceeded
100 Execution timed out 1070 ms 43152 KB Time limit exceeded