| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 88113 |
2018-12-03T20:32:01 Z |
Pajaraja |
Bomb (IZhO17_bomb) |
C++17 |
|
1000 ms |
69020 KB |
#include <bits/stdc++.h>
#define MAXN 2507
using namespace std;
bool t[MAXN][MAXN],r[MAXN][MAXN];
int p[MAXN][MAXN],d[MAXN][MAXN],n,m,lh,lv;
char s[MAXN][MAXN];
bool provera(int x,int y)
{
for(int i=x;i<=n;i++) for(int j=y;j<=m;j++) r[i][j]=(p[i][j]-p[i-x][j]-p[i][j-y]+p[i-x][j-y]==x*y);
for(int i=n;i>0;i--) for(int j=m;j>0;j--) d[i][j]=r[i][j]+d[i+1][j]+d[i][j+1]-d[i+1][j+1];
for(int i=1;i<=n;i++) for(int j=1;j<=m;j++) if(t[i][j] && d[i][j]-d[min(n+1,i+x)][j]-d[i][min(m+1,j+y)]+d[min(n+1,i+x)][min(m+1,j+y)]==0) return false;
return true;
}
int binarna(int l,int r,int x)
{
if(l==r) return l;
int s=(l+r+1)/2;
if(provera(s,x)) return binarna(s,r,x);
return binarna(l,s-1,x);
}
int najres(int x) {return x*binarna(1,lv,x);}
int main()
{
lh=lv=MAXN;
scanf("%d%d",&n,&m);
for(int i=1;i<=n;i++)
{
scanf("%s",s[i]);
for(int j=1;j<=m;j++) t[i][j]=(s[i][j-1]=='1'?1:0);
}
for(int i=1;i<=n;i++)
{
int cur=0;
for(int j=1;j<=m;j++)
{
if(t[i][j]==0) {if(cur!=0) lh=min(lh,cur); cur=0;}
else cur++;
}
if(cur!=0) lh=min(lh,cur);
}
for(int i=1;i<=m;i++)
{
int cur=0;
for(int j=1;j<=n;j++)
{
if(t[j][i]==0) {if(cur!=0) lv=min(lv,cur); cur=0;}
else cur++;
}
if(cur!=0) lv=min(lv,cur);
}
int sol=0;
for(int i=1;i<=n;i++) for(int j=1;j<=m;j++) p[i][j]=t[i][j]+p[i-1][j]+p[i][j-1]-p[i-1][j-1];
int l=1,r=lh;
while(r-l>10)
{
int s1=(2*l+r)/3,s2=(l+2*r)/3;
if(najres(s1)<najres(s2)) l=s1;
else r=s2;
}
for(int i=l;i<=r;i++) sol=max(sol,najres(i));
/*for(int i=1;i<=lv;i++)
{
while(!provera(i,lh)) lh--;
if(sol>lh*lv) break;
sol=max(sol,lh*i);
}*/
printf("%d",sol);
}
Compilation message
bomb.cpp: In function 'int main()':
bomb.cpp:25:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d",&n,&m);
~~~~~^~~~~~~~~~~~~~
bomb.cpp:28:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%s",s[i]);
~~~~~^~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
376 KB |
Output is correct |
| 2 |
Correct |
3 ms |
760 KB |
Output is correct |
| 3 |
Correct |
50 ms |
38856 KB |
Output is correct |
| 4 |
Correct |
49 ms |
38884 KB |
Output is correct |
| 5 |
Correct |
2 ms |
38884 KB |
Output is correct |
| 6 |
Correct |
2 ms |
38884 KB |
Output is correct |
| 7 |
Correct |
2 ms |
38884 KB |
Output is correct |
| 8 |
Correct |
3 ms |
38884 KB |
Output is correct |
| 9 |
Correct |
3 ms |
38884 KB |
Output is correct |
| 10 |
Correct |
3 ms |
38884 KB |
Output is correct |
| 11 |
Correct |
3 ms |
38884 KB |
Output is correct |
| 12 |
Correct |
2 ms |
38884 KB |
Output is correct |
| 13 |
Correct |
2 ms |
38884 KB |
Output is correct |
| 14 |
Correct |
3 ms |
38884 KB |
Output is correct |
| 15 |
Correct |
2 ms |
38884 KB |
Output is correct |
| 16 |
Correct |
2 ms |
38884 KB |
Output is correct |
| 17 |
Correct |
4 ms |
38884 KB |
Output is correct |
| 18 |
Correct |
4 ms |
38884 KB |
Output is correct |
| 19 |
Correct |
6 ms |
38884 KB |
Output is correct |
| 20 |
Correct |
6 ms |
38884 KB |
Output is correct |
| 21 |
Correct |
4 ms |
38884 KB |
Output is correct |
| 22 |
Correct |
4 ms |
38884 KB |
Output is correct |
| 23 |
Correct |
9 ms |
38884 KB |
Output is correct |
| 24 |
Incorrect |
5 ms |
38884 KB |
Output isn't correct |
| 25 |
Incorrect |
9 ms |
38884 KB |
Output isn't correct |
| 26 |
Correct |
8 ms |
38884 KB |
Output is correct |
| 27 |
Correct |
7 ms |
38884 KB |
Output is correct |
| 28 |
Correct |
23 ms |
38884 KB |
Output is correct |
| 29 |
Correct |
122 ms |
38884 KB |
Output is correct |
| 30 |
Incorrect |
142 ms |
38884 KB |
Output isn't correct |
| 31 |
Incorrect |
113 ms |
38884 KB |
Output isn't correct |
| 32 |
Incorrect |
107 ms |
38884 KB |
Output isn't correct |
| 33 |
Correct |
193 ms |
38884 KB |
Output is correct |
| 34 |
Correct |
25 ms |
38884 KB |
Output is correct |
| 35 |
Correct |
124 ms |
38884 KB |
Output is correct |
| 36 |
Correct |
151 ms |
38884 KB |
Output is correct |
| 37 |
Correct |
2 ms |
38884 KB |
Output is correct |
| 38 |
Execution timed out |
1090 ms |
65572 KB |
Time limit exceeded |
| 39 |
Correct |
3 ms |
65572 KB |
Output is correct |
| 40 |
Execution timed out |
1070 ms |
65572 KB |
Time limit exceeded |
| 41 |
Correct |
3 ms |
65572 KB |
Output is correct |
| 42 |
Correct |
10 ms |
65572 KB |
Output is correct |
| 43 |
Execution timed out |
1079 ms |
68048 KB |
Time limit exceeded |
| 44 |
Correct |
283 ms |
68048 KB |
Output is correct |
| 45 |
Execution timed out |
1058 ms |
68048 KB |
Time limit exceeded |
| 46 |
Execution timed out |
1070 ms |
68688 KB |
Time limit exceeded |
| 47 |
Execution timed out |
1059 ms |
68688 KB |
Time limit exceeded |
| 48 |
Execution timed out |
1056 ms |
68688 KB |
Time limit exceeded |
| 49 |
Correct |
762 ms |
68688 KB |
Output is correct |
| 50 |
Execution timed out |
1078 ms |
68688 KB |
Time limit exceeded |
| 51 |
Execution timed out |
1084 ms |
68688 KB |
Time limit exceeded |
| 52 |
Execution timed out |
1082 ms |
68688 KB |
Time limit exceeded |
| 53 |
Execution timed out |
1058 ms |
68688 KB |
Time limit exceeded |
| 54 |
Execution timed out |
1083 ms |
68688 KB |
Time limit exceeded |
| 55 |
Execution timed out |
1074 ms |
68716 KB |
Time limit exceeded |
| 56 |
Execution timed out |
1077 ms |
68716 KB |
Time limit exceeded |
| 57 |
Execution timed out |
1081 ms |
68720 KB |
Time limit exceeded |
| 58 |
Execution timed out |
1058 ms |
68820 KB |
Time limit exceeded |
| 59 |
Execution timed out |
1064 ms |
68820 KB |
Time limit exceeded |
| 60 |
Execution timed out |
1069 ms |
68820 KB |
Time limit exceeded |
| 61 |
Execution timed out |
1066 ms |
68820 KB |
Time limit exceeded |
| 62 |
Execution timed out |
1080 ms |
68820 KB |
Time limit exceeded |
| 63 |
Execution timed out |
1090 ms |
68820 KB |
Time limit exceeded |
| 64 |
Execution timed out |
1080 ms |
68820 KB |
Time limit exceeded |
| 65 |
Execution timed out |
1093 ms |
68896 KB |
Time limit exceeded |
| 66 |
Execution timed out |
1091 ms |
68896 KB |
Time limit exceeded |
| 67 |
Execution timed out |
1086 ms |
68896 KB |
Time limit exceeded |
| 68 |
Execution timed out |
1092 ms |
68896 KB |
Time limit exceeded |
| 69 |
Execution timed out |
1083 ms |
68896 KB |
Time limit exceeded |
| 70 |
Execution timed out |
1086 ms |
68896 KB |
Time limit exceeded |
| 71 |
Execution timed out |
1082 ms |
68896 KB |
Time limit exceeded |
| 72 |
Execution timed out |
1084 ms |
68896 KB |
Time limit exceeded |
| 73 |
Execution timed out |
1092 ms |
68896 KB |
Time limit exceeded |
| 74 |
Execution timed out |
1091 ms |
68896 KB |
Time limit exceeded |
| 75 |
Execution timed out |
1091 ms |
68896 KB |
Time limit exceeded |
| 76 |
Execution timed out |
1090 ms |
68896 KB |
Time limit exceeded |
| 77 |
Execution timed out |
1095 ms |
68912 KB |
Time limit exceeded |
| 78 |
Execution timed out |
1092 ms |
68912 KB |
Time limit exceeded |
| 79 |
Execution timed out |
1089 ms |
68912 KB |
Time limit exceeded |
| 80 |
Execution timed out |
1081 ms |
68996 KB |
Time limit exceeded |
| 81 |
Execution timed out |
1088 ms |
68996 KB |
Time limit exceeded |
| 82 |
Execution timed out |
1089 ms |
69016 KB |
Time limit exceeded |
| 83 |
Execution timed out |
1091 ms |
69016 KB |
Time limit exceeded |
| 84 |
Execution timed out |
1086 ms |
69016 KB |
Time limit exceeded |
| 85 |
Execution timed out |
1090 ms |
69016 KB |
Time limit exceeded |
| 86 |
Execution timed out |
1079 ms |
69020 KB |
Time limit exceeded |
| 87 |
Execution timed out |
1095 ms |
69020 KB |
Time limit exceeded |
| 88 |
Execution timed out |
1087 ms |
69020 KB |
Time limit exceeded |
| 89 |
Execution timed out |
1073 ms |
69020 KB |
Time limit exceeded |
| 90 |
Execution timed out |
1073 ms |
69020 KB |
Time limit exceeded |
| 91 |
Execution timed out |
1084 ms |
69020 KB |
Time limit exceeded |
| 92 |
Execution timed out |
1095 ms |
69020 KB |
Time limit exceeded |
| 93 |
Execution timed out |
1088 ms |
69020 KB |
Time limit exceeded |
| 94 |
Execution timed out |
1085 ms |
69020 KB |
Time limit exceeded |
| 95 |
Execution timed out |
1092 ms |
69020 KB |
Time limit exceeded |
| 96 |
Execution timed out |
1086 ms |
69020 KB |
Time limit exceeded |
| 97 |
Execution timed out |
1086 ms |
69020 KB |
Time limit exceeded |
| 98 |
Execution timed out |
1089 ms |
69020 KB |
Time limit exceeded |
| 99 |
Execution timed out |
1090 ms |
69020 KB |
Time limit exceeded |
| 100 |
Execution timed out |
1091 ms |
69020 KB |
Time limit exceeded |
