oj.uz

Submission #91268

# Submission time Handle Problem Language Result Execution time Memory
91268 2018-12-26T19:58:18 Z Vardanyan Bomb (IZhO17_bomb) C++14
8 / 100
 1000 ms 132096 KB 
#include<bits/stdc++.h>

using namespace std;
const int N = 2505;
int a[N][N];
int pref[N][N];
int pref2[N][N];
int calc1(int x1,int y1,int x2,int y2){
    return pref[x2][y2]-pref[x2][y1-1]-pref[x1-1][y2]+pref[x1-1][y1-1];
}
int calc2(int x1,int y1,int x2,int y2){
    return pref2[x2][y2]-pref2[x2][y1-1]-pref2[x1-1][y2]+pref2[x1-1][y1-1];
}
int main()
{
    int n,m;
    scanf("%d%d",&n,&m);
    for(int i = 1;i<=n;i++){
        for(int j = 1;j<=m;j++){
            char c;
            scanf(" %c",&c);
            a[i][j] = (c == '1');
        }
    }
    for(int i = 1;i<=n;i++){
        for(int j = 1;j<=n;j++){
            pref[i][j] = pref[i-1][j]+pref[i][j-1]-pref[i-1][j-1]+a[i][j];
        }
    }
    int l = 1;
    int r = n*m;
    int ans = 1;
    while(l<=r){
        int mid = (l+r)/2;
        bool F = false;
        for(int q = 1;q<=sqrt(mid);q++){
            if(mid%q) continue;
            int x = mid/q;
            int y = q;
            bool f = true;
            for(int i = 1;i<=n;i++){
                for(int j = 1;j<=m;j++){
                  //  if(a[i][j]!=1) continue;
                    pref2[i][j] = pref2[i-1][j]+pref2[i][j-1]-pref2[i-1][j-1];
                    if(i+x-1<=n && j+y-1<=m){
                        if(calc1(i,j,i+x-1,j+y-1) == mid){
                            pref2[i][j] = pref2[i-1][j]+pref2[i][j-1]-pref2[i-1][j-1]+1;
                        }
                    }
                    if(a[i][j] == 0) continue;
                    int x1 = i-x+1;
                    int y1 = j-y+1;
                    x1 = max(1,x1);
                    y1 = max(1,y1);
                    if(calc2(x1,y1,i,j) == 0){
                        f = false;
                        break;
                    }
                }
            }
            if(f){
                F = true;
                break;
            }
            swap(x,y);
            f = true;
            for(int i = 1;i<=n;i++){
                for(int j = 1;j<=m;j++){
                    if(a[i][j]!=1) continue;
                    if(i+x-1<=n && j+y-1<=m){
                        if(calc1(i,j,i+x-1,j+y-1) == mid){
                            pref2[i][j] = pref2[i-1][j]+pref2[i][j-1]-pref2[i-1][j-1]+1;
                        }
                        else{
                            pref2[i][j] = pref2[i-1][j]+pref2[i][j-1]-pref2[i-1][j-1];
                        }
                    }
                    int x1 = i-x+1;
                    int y1 = j-y+1;
                    x1 = max(1,x1);
                    y1 = max(1,y1);
                    if(calc2(x1,y1,i,j) == 0){
                        f = false;
                        break;
                    }
                }
            }
        }
        if(F){
            ans = mid;
            l = mid+1;
        }
        else r = mid-1;
    }
    cout<<ans<<endl;
    return 0;
}

Compilation message

bomb.cpp: In function 'int main()':
bomb.cpp:17:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&n,&m);
     ~~~~~^~~~~~~~~~~~~~
bomb.cpp:21:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf(" %c",&c);
             ~~~~~^~~~~~~~~~

Subtask #1
8.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 376 KB Output isn't correct
2 Correct 2 ms 632 KB Output is correct
3 Correct 60 ms 45160 KB Output is correct
4 Correct 62 ms 45276 KB Output is correct
5 Incorrect 2 ms 45276 KB Output isn't correct
6 Incorrect 2 ms 45276 KB Output isn't correct
7 Incorrect 2 ms 45276 KB Output isn't correct
8 Incorrect 2 ms 45276 KB Output isn't correct
9 Incorrect 2 ms 45276 KB Output isn't correct
10 Incorrect 2 ms 45276 KB Output isn't correct
11 Incorrect 2 ms 45276 KB Output isn't correct
12 Correct 2 ms 45276 KB Output is correct
13 Incorrect 2 ms 45276 KB Output isn't correct
14 Correct 2 ms 45276 KB Output is correct
15 Incorrect 2 ms 45276 KB Output isn't correct
16 Incorrect 2 ms 45276 KB Output isn't correct
17 Incorrect 3 ms 45276 KB Output isn't correct
18 Correct 3 ms 45276 KB Output is correct
19 Incorrect 4 ms 45276 KB Output isn't correct
20 Incorrect 4 ms 45276 KB Output isn't correct
21 Correct 3 ms 45276 KB Output is correct
22 Incorrect 4 ms 45276 KB Output isn't correct
23 Incorrect 5 ms 45276 KB Output isn't correct
24 Incorrect 3 ms 45276 KB Output isn't correct
25 Incorrect 5 ms 45276 KB Output isn't correct
26 Incorrect 5 ms 45276 KB Output isn't correct
27 Incorrect 20 ms 45276 KB Output isn't correct
28 Incorrect 27 ms 45276 KB Output isn't correct
29 Incorrect 75 ms 45276 KB Output isn't correct
30 Incorrect 84 ms 45276 KB Output isn't correct
31 Incorrect 36 ms 45276 KB Output isn't correct
32 Incorrect 34 ms 45276 KB Output isn't correct
33 Incorrect 62 ms 45276 KB Output isn't correct
34 Correct 30 ms 45276 KB Output is correct
35 Incorrect 84 ms 45276 KB Output isn't correct
36 Incorrect 56 ms 45276 KB Output isn't correct
37 Incorrect 2 ms 45276 KB Output isn't correct
38 Incorrect 469 ms 82076 KB Output isn't correct
39 Incorrect 2 ms 82076 KB Output isn't correct
40 Incorrect 191 ms 82076 KB Output isn't correct
41 Incorrect 2 ms 82076 KB Output isn't correct
42 Incorrect 5 ms 82076 KB Output isn't correct
43 Execution timed out 1073 ms 89024 KB Time limit exceeded
44 Incorrect 61 ms 89024 KB Output isn't correct
45 Execution timed out 1093 ms 95288 KB Time limit exceeded
46 Incorrect 531 ms 101416 KB Output isn't correct
47 Execution timed out 1086 ms 107672 KB Time limit exceeded
48 Execution timed out 1085 ms 107896 KB Time limit exceeded
49 Execution timed out 1085 ms 119968 KB Time limit exceeded
50 Execution timed out 1080 ms 125820 KB Time limit exceeded
51 Execution timed out 1091 ms 125820 KB Time limit exceeded
52 Execution timed out 1076 ms 132096 KB Time limit exceeded
53 Execution timed out 1089 ms 132096 KB Time limit exceeded
54 Execution timed out 1085 ms 132096 KB Time limit exceeded
55 Execution timed out 1093 ms 132096 KB Time limit exceeded
56 Runtime error 536 ms 132096 KB Memory limit exceeded: We have a known bug that the memory usage is measured incorrectly (possibly because of Meltdown/Spectre patch), so your solution may be correct. Please submit again. Sorry for the inconvenience.
57 Execution timed out 1089 ms 132096 KB Time limit exceeded
58 Execution timed out 1090 ms 132096 KB Time limit exceeded
59 Execution timed out 1085 ms 132096 KB Time limit exceeded
60 Execution timed out 1093 ms 132096 KB Time limit exceeded
61 Execution timed out 1084 ms 132096 KB Time limit exceeded
62 Execution timed out 1094 ms 132096 KB Time limit exceeded
63 Runtime error 889 ms 132096 KB Memory limit exceeded: We have a known bug that the memory usage is measured incorrectly (possibly because of Meltdown/Spectre patch), so your solution may be correct. Please submit again. Sorry for the inconvenience.
64 Execution timed out 1075 ms 132096 KB Time limit exceeded
65 Execution timed out 1095 ms 132096 KB Time limit exceeded
66 Execution timed out 1095 ms 132096 KB Time limit exceeded
67 Execution timed out 1076 ms 132096 KB Time limit exceeded
68 Execution timed out 1084 ms 132096 KB Time limit exceeded
69 Execution timed out 1085 ms 132096 KB Time limit exceeded
70 Execution timed out 1064 ms 132096 KB Time limit exceeded
71 Execution timed out 1094 ms 132096 KB Time limit exceeded
72 Execution timed out 1091 ms 132096 KB Time limit exceeded
73 Execution timed out 1093 ms 132096 KB Time limit exceeded
74 Execution timed out 1086 ms 132096 KB Time limit exceeded
75 Execution timed out 1088 ms 132096 KB Time limit exceeded
76 Execution timed out 1083 ms 132096 KB Time limit exceeded
77 Execution timed out 1089 ms 132096 KB Time limit exceeded
78 Execution timed out 1095 ms 132096 KB Time limit exceeded
79 Execution timed out 1098 ms 132096 KB Time limit exceeded
80 Execution timed out 1086 ms 132096 KB Time limit exceeded
81 Execution timed out 1085 ms 132096 KB Time limit exceeded
82 Execution timed out 1073 ms 132096 KB Time limit exceeded
83 Execution timed out 1084 ms 132096 KB Time limit exceeded
84 Execution timed out 1082 ms 132096 KB Time limit exceeded
85 Execution timed out 1091 ms 132096 KB Time limit exceeded
86 Execution timed out 1091 ms 132096 KB Time limit exceeded
87 Execution timed out 1070 ms 132096 KB Time limit exceeded
88 Execution timed out 1093 ms 132096 KB Time limit exceeded
89 Execution timed out 1086 ms 132096 KB Time limit exceeded
90 Execution timed out 1079 ms 132096 KB Time limit exceeded
91 Execution timed out 1075 ms 132096 KB Time limit exceeded
92 Execution timed out 1078 ms 132096 KB Time limit exceeded
93 Execution timed out 1085 ms 132096 KB Time limit exceeded
94 Execution timed out 1085 ms 132096 KB Time limit exceeded
95 Execution timed out 1088 ms 132096 KB Time limit exceeded
96 Execution timed out 1078 ms 132096 KB Time limit exceeded
97 Execution timed out 1090 ms 132096 KB Time limit exceeded
98 Execution timed out 1073 ms 132096 KB Time limit exceeded
99 Execution timed out 1078 ms 132096 KB Time limit exceeded
100 Execution timed out 1081 ms 132096 KB Time limit exceeded