oj.uz

Submission #334542

# Submission time Handle Problem Language Result Execution time Memory
334542 2020-12-09T11:17:34 Z beksultan04 Bomb (IZhO17_bomb) C++14
100 / 100
 457 ms 78060 KB 
#include <bits/stdc++.h>
using namespace std;
//#define int long long
#define pii pair<int,int>
#define OK puts("OK");
#define fr first
#define sc second
#define ret return
#define scan1(a) scanf("%lld",&a);
#define scan2(a,b) scanf("%lld %lld",&a, &b);
#define scan3(a,b,c) scanf("%lld %lld %lld",&a,&b,&c);
#define all(s) s.begin(),s.end()
#define pb push_back
#define endi puts("");
const int N = 1e5+12,INF=1e9+7;
int q[2505][2505],dp[N],up[2505][2505],down[2505][2505],ans[N];

main(){
    int n,m,i,j,X=INF,Y=INF;
    cin>>n>>m;
    for (i=1;i<=n;++i)
        for (j=1;j<=m;++j){
            char ch;
            cin>>ch;
            q[i][j]=ch-'0';
        }


    for (i=1;i<=n;++i){
        for (j=1;j<=m;++j){
            if (q[i][j]){
                up[i][j] = 1+up[i-1][j];
            }
        }
    }
    for (i=n;i>0;--i){
        for (j=1;j<=m;++j){
            if (q[i][j]){
                down[i][j] = 1+down[i+1][j];
                if (q[i-1][j] == 0)X = min(X,down[i][j]);
            }
        }
    }
/// /// /// ///
    for (i=1;i<=m;++i){
        ans[i]=X;
    }
    for (i=1;i<=n;++i){
        int a=INF,b=INF,c=0;
        for (j=1;j<=m;++j){
            if (q[i][j] == 0){
                if (c != 0)
                X = min(X,c);
                a=b=INF;
                c=0;
            }
            else {
                a = min(a,down[i][j]);
                b = min(b,up[i][j]);
                c++;
                ans[c] = min(ans[c],b+a-1);
            }
        }


        a=INF,b=INF,c=0;
        for (j=m;j>0;--j){
            if (q[i][j] == 0){
                if (c != 0)
                Y    = min(Y,c);
                a=b=INF;
                c=0;
            }
            else {
                a = min(a,down[i][j]);
                b = min(b,up[i][j]);
                c++;
                ans[c] = min(ans[c],b+a-1);
            }
        }
        if (c > 0)
            Y = min(Y,c);
    }

/// /// /// ///
    int mx = 0;

    for (i=1;i<=Y;++i){
        mx = max(mx,ans[i]*i);
    }
    cout <<mx;


}

Compilation message

bomb.cpp:18:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   18 | main(){
      |      ^

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 492 KB Output is correct
3 Correct 16 ms 30444 KB Output is correct
4 Correct 17 ms 30444 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 492 KB Output is correct
9 Correct 1 ms 492 KB Output is correct
10 Correct 1 ms 492 KB Output is correct
11 Correct 1 ms 620 KB Output is correct
12 Correct 1 ms 492 KB Output is correct
13 Correct 1 ms 492 KB Output is correct
14 Correct 1 ms 492 KB Output is correct
15 Correct 1 ms 492 KB Output is correct
16 Correct 1 ms 620 KB Output is correct
17 Correct 1 ms 1132 KB Output is correct
18 Correct 1 ms 896 KB Output is correct
19 Correct 1 ms 1132 KB Output is correct
20 Correct 1 ms 1132 KB Output is correct
21 Correct 1 ms 748 KB Output is correct
22 Correct 1 ms 1004 KB Output is correct
23 Correct 2 ms 1260 KB Output is correct
24 Correct 1 ms 1132 KB Output is correct
25 Correct 2 ms 1516 KB Output is correct
26 Correct 2 ms 1644 KB Output is correct
27 Correct 8 ms 4844 KB Output is correct
28 Correct 11 ms 2284 KB Output is correct
29 Correct 12 ms 6252 KB Output is correct
30 Correct 15 ms 5612 KB Output is correct
31 Correct 12 ms 4204 KB Output is correct
32 Correct 13 ms 5356 KB Output is correct
33 Correct 17 ms 6764 KB Output is correct
34 Correct 7 ms 2540 KB Output is correct
35 Correct 15 ms 3436 KB Output is correct
36 Correct 18 ms 8044 KB Output is correct
37 Correct 1 ms 512 KB Output is correct
38 Correct 450 ms 78060 KB Output is correct
39 Correct 1 ms 620 KB Output is correct
40 Correct 62 ms 19920 KB Output is correct
41 Correct 1 ms 620 KB Output is correct
42 Correct 2 ms 1644 KB Output is correct
43 Correct 440 ms 70120 KB Output is correct
44 Correct 18 ms 7660 KB Output is correct
45 Correct 447 ms 71404 KB Output is correct
46 Correct 447 ms 78060 KB Output is correct
47 Correct 437 ms 71532 KB Output is correct
48 Correct 440 ms 77420 KB Output is correct
49 Correct 451 ms 78060 KB Output is correct
50 Correct 457 ms 77920 KB Output is correct
51 Correct 450 ms 73964 KB Output is correct
52 Correct 440 ms 74348 KB Output is correct
53 Correct 438 ms 73196 KB Output is correct
54 Correct 428 ms 60524 KB Output is correct
55 Correct 427 ms 58868 KB Output is correct
56 Correct 451 ms 77932 KB Output is correct
57 Correct 422 ms 53868 KB Output is correct
58 Correct 430 ms 59084 KB Output is correct
59 Correct 421 ms 55788 KB Output is correct
60 Correct 434 ms 65772 KB Output is correct
61 Correct 446 ms 78060 KB Output is correct
62 Correct 444 ms 77932 KB Output is correct
63 Correct 446 ms 78060 KB Output is correct
64 Correct 426 ms 57068 KB Output is correct
65 Correct 435 ms 72940 KB Output is correct
66 Correct 435 ms 69740 KB Output is correct
67 Correct 442 ms 77932 KB Output is correct
68 Correct 442 ms 78060 KB Output is correct
69 Correct 425 ms 53484 KB Output is correct
70 Correct 264 ms 29932 KB Output is correct
71 Correct 420 ms 46444 KB Output is correct
72 Correct 426 ms 51948 KB Output is correct
73 Correct 422 ms 52460 KB Output is correct
74 Correct 434 ms 53980 KB Output is correct
75 Correct 426 ms 55532 KB Output is correct
76 Correct 428 ms 56940 KB Output is correct
77 Correct 421 ms 57452 KB Output is correct
78 Correct 427 ms 57708 KB Output is correct
79 Correct 420 ms 30188 KB Output is correct
80 Correct 420 ms 31492 KB Output is correct
81 Correct 410 ms 31756 KB Output is correct
82 Correct 426 ms 60140 KB Output is correct
83 Correct 430 ms 60316 KB Output is correct
84 Correct 415 ms 25452 KB Output is correct
85 Correct 432 ms 59244 KB Output is correct
86 Correct 453 ms 76784 KB Output is correct
87 Correct 428 ms 58164 KB Output is correct
88 Correct 428 ms 58988 KB Output is correct
89 Correct 449 ms 67760 KB Output is correct
90 Correct 292 ms 44124 KB Output is correct
91 Correct 433 ms 62948 KB Output is correct
92 Correct 433 ms 64628 KB Output is correct
93 Correct 445 ms 75656 KB Output is correct
94 Correct 432 ms 66540 KB Output is correct
95 Correct 446 ms 60396 KB Output is correct
96 Correct 424 ms 60012 KB Output is correct
97 Correct 442 ms 76540 KB Output is correct
98 Correct 425 ms 59932 KB Output is correct
99 Correct 443 ms 66156 KB Output is correct
100 Correct 440 ms 75244 KB Output is correct