| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 37654 |
2017-12-26T16:45:27 Z |
Kerim |
Bomb (IZhO17_bomb) |
C++14 |
|
903 ms |
57352 KB |
#include "bits/stdc++.h"
#define MAXN 100009
#define INF 1000000007
#define mp(x,y) make_pair(x,y)
#define all(v) v.begin(),v.end()
#define pb(x) push_back(x)
#define wr cout<<"----------------"<<endl;
#define ppb() pop_back()
#define tr(ii,c) for(__typeof((c).begin()) ii=(c).begin();ii!=(c).end();ii++)
#define ff first
#define ss second
#define my_little_dodge 46
#define debug(x) cerr<< #x <<" = "<< x<<endl;
using namespace std;
typedef long long ll;
typedef pair<int,int> PII;
template<class T>bool umin(T& a,T b){if(a>b){a=b;return 1;}return 0;}
template<class T>bool umax(T& a,T b){if(a<b){a=b;return 1;}return 0;}
const int N=2509;
char arr[N][N];
int up[N][N],down[N][N],ans[N];
int main(){
//~ freopen("file.in", "r", stdin);
int n,m;
scanf("%d%d",&n,&m);
for(int i=1;i<=n;i++)
for(int j=1;j<=m;j++)
scanf(" %c",&arr[i][j]);
int xx=n,yy=m;
for(int i=1;i<=n;i++){
int cnt=0;
for(int j=1;j<=m;j++){
if(arr[i][j]=='1')
cnt++;
else{
if(cnt)
umin(yy,cnt);
cnt=0;
}
}
if(cnt)
umin(yy,cnt);
}
for(int j=1;j<=m;j++){
int cnt=0;
for(int i=1;i<=n;i++){
if(arr[i][j]=='1')
up[i][j]=up[i-1][j]+1,cnt++;
else{
if(cnt)
umin(xx,cnt);
cnt=0;
}
}
if(cnt)
umin(xx,cnt);
for(int i=n;i>=1;i--)
if(arr[i][j]=='1')
down[i][j]=down[i+1][j]+1;
}
for(int i=1;i<=yy;i++)
ans[i]=xx;
for(int i=1;i<=n;i++){
int cnt=0;
int a=INF,b=INF;
for(int j=1;j<=m;j++){
if(arr[i][j]=='1'){
umin(a,up[i][j]);
umin(b,down[i][j]);
umin(ans[++cnt],a+b-1);
}
else
cnt=0,a=b=INF;
}a=b=INF;cnt=0;
for(int j=m;j>=1;j--){
if(arr[i][j]=='1'){
umin(a,up[i][j]);
umin(b,down[i][j]);
umin(ans[++cnt],a+b-1);
}
else
cnt=0,a=b=INF;
}
}
int res=ans[1];
for(int i=2;i<=yy;i++){
umin(ans[i],ans[i-1]);
umax(res,i*ans[i]);
}printf("%d\n",res);
return 0;
}
Compilation message
bomb.cpp: In function 'int main()':
bomb.cpp:26:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d",&n,&m);
^
bomb.cpp:29:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf(" %c",&arr[i][j]);
^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
57352 KB |
Output is correct |
| 2 |
Correct |
0 ms |
57352 KB |
Output is correct |
| 3 |
Correct |
0 ms |
57352 KB |
Output is correct |
| 4 |
Correct |
0 ms |
57352 KB |
Output is correct |
| 5 |
Correct |
0 ms |
57352 KB |
Output is correct |
| 6 |
Correct |
0 ms |
57352 KB |
Output is correct |
| 7 |
Correct |
0 ms |
57352 KB |
Output is correct |
| 8 |
Correct |
0 ms |
57352 KB |
Output is correct |
| 9 |
Correct |
0 ms |
57352 KB |
Output is correct |
| 10 |
Correct |
0 ms |
57352 KB |
Output is correct |
| 11 |
Correct |
0 ms |
57352 KB |
Output is correct |
| 12 |
Correct |
0 ms |
57352 KB |
Output is correct |
| 13 |
Correct |
0 ms |
57352 KB |
Output is correct |
| 14 |
Correct |
0 ms |
57352 KB |
Output is correct |
| 15 |
Correct |
0 ms |
57352 KB |
Output is correct |
| 16 |
Correct |
0 ms |
57352 KB |
Output is correct |
| 17 |
Correct |
0 ms |
57352 KB |
Output is correct |
| 18 |
Correct |
0 ms |
57352 KB |
Output is correct |
| 19 |
Correct |
0 ms |
57352 KB |
Output is correct |
| 20 |
Correct |
0 ms |
57352 KB |
Output is correct |
| 21 |
Correct |
0 ms |
57352 KB |
Output is correct |
| 22 |
Correct |
0 ms |
57352 KB |
Output is correct |
| 23 |
Correct |
0 ms |
57352 KB |
Output is correct |
| 24 |
Correct |
0 ms |
57352 KB |
Output is correct |
| 25 |
Correct |
0 ms |
57352 KB |
Output is correct |
| 26 |
Correct |
0 ms |
57352 KB |
Output is correct |
| 27 |
Correct |
6 ms |
57352 KB |
Output is correct |
| 28 |
Correct |
6 ms |
57352 KB |
Output is correct |
| 29 |
Correct |
9 ms |
57352 KB |
Output is correct |
| 30 |
Correct |
6 ms |
57352 KB |
Output is correct |
| 31 |
Correct |
9 ms |
57352 KB |
Output is correct |
| 32 |
Correct |
13 ms |
57352 KB |
Output is correct |
| 33 |
Correct |
23 ms |
57352 KB |
Output is correct |
| 34 |
Correct |
3 ms |
57352 KB |
Output is correct |
| 35 |
Correct |
16 ms |
57352 KB |
Output is correct |
| 36 |
Correct |
16 ms |
57352 KB |
Output is correct |
| 37 |
Correct |
0 ms |
57352 KB |
Output is correct |
| 38 |
Correct |
856 ms |
57352 KB |
Output is correct |
| 39 |
Correct |
0 ms |
57352 KB |
Output is correct |
| 40 |
Correct |
79 ms |
57352 KB |
Output is correct |
| 41 |
Correct |
0 ms |
57352 KB |
Output is correct |
| 42 |
Correct |
0 ms |
57352 KB |
Output is correct |
| 43 |
Correct |
736 ms |
57352 KB |
Output is correct |
| 44 |
Correct |
19 ms |
57352 KB |
Output is correct |
| 45 |
Correct |
733 ms |
57352 KB |
Output is correct |
| 46 |
Correct |
699 ms |
57352 KB |
Output is correct |
| 47 |
Correct |
719 ms |
57352 KB |
Output is correct |
| 48 |
Correct |
683 ms |
57352 KB |
Output is correct |
| 49 |
Correct |
836 ms |
57352 KB |
Output is correct |
| 50 |
Correct |
739 ms |
57352 KB |
Output is correct |
| 51 |
Correct |
609 ms |
57352 KB |
Output is correct |
| 52 |
Correct |
703 ms |
57352 KB |
Output is correct |
| 53 |
Correct |
696 ms |
57352 KB |
Output is correct |
| 54 |
Correct |
606 ms |
57352 KB |
Output is correct |
| 55 |
Correct |
606 ms |
57352 KB |
Output is correct |
| 56 |
Correct |
819 ms |
57352 KB |
Output is correct |
| 57 |
Correct |
609 ms |
57352 KB |
Output is correct |
| 58 |
Correct |
646 ms |
57352 KB |
Output is correct |
| 59 |
Correct |
639 ms |
57352 KB |
Output is correct |
| 60 |
Correct |
759 ms |
57352 KB |
Output is correct |
| 61 |
Correct |
819 ms |
57352 KB |
Output is correct |
| 62 |
Correct |
863 ms |
57352 KB |
Output is correct |
| 63 |
Correct |
903 ms |
57352 KB |
Output is correct |
| 64 |
Correct |
583 ms |
57352 KB |
Output is correct |
| 65 |
Correct |
729 ms |
57352 KB |
Output is correct |
| 66 |
Correct |
623 ms |
57352 KB |
Output is correct |
| 67 |
Correct |
739 ms |
57352 KB |
Output is correct |
| 68 |
Correct |
773 ms |
57352 KB |
Output is correct |
| 69 |
Correct |
566 ms |
57352 KB |
Output is correct |
| 70 |
Correct |
296 ms |
57352 KB |
Output is correct |
| 71 |
Correct |
499 ms |
57352 KB |
Output is correct |
| 72 |
Correct |
526 ms |
57352 KB |
Output is correct |
| 73 |
Correct |
573 ms |
57352 KB |
Output is correct |
| 74 |
Correct |
576 ms |
57352 KB |
Output is correct |
| 75 |
Correct |
589 ms |
57352 KB |
Output is correct |
| 76 |
Correct |
606 ms |
57352 KB |
Output is correct |
| 77 |
Correct |
593 ms |
57352 KB |
Output is correct |
| 78 |
Correct |
536 ms |
57352 KB |
Output is correct |
| 79 |
Correct |
569 ms |
57352 KB |
Output is correct |
| 80 |
Correct |
529 ms |
57352 KB |
Output is correct |
| 81 |
Correct |
479 ms |
57352 KB |
Output is correct |
| 82 |
Correct |
613 ms |
57352 KB |
Output is correct |
| 83 |
Correct |
559 ms |
57352 KB |
Output is correct |
| 84 |
Correct |
459 ms |
57352 KB |
Output is correct |
| 85 |
Correct |
603 ms |
57352 KB |
Output is correct |
| 86 |
Correct |
819 ms |
57352 KB |
Output is correct |
| 87 |
Correct |
526 ms |
57352 KB |
Output is correct |
| 88 |
Correct |
556 ms |
57352 KB |
Output is correct |
| 89 |
Correct |
673 ms |
57352 KB |
Output is correct |
| 90 |
Correct |
333 ms |
57352 KB |
Output is correct |
| 91 |
Correct |
573 ms |
57352 KB |
Output is correct |
| 92 |
Correct |
673 ms |
57352 KB |
Output is correct |
| 93 |
Correct |
833 ms |
57352 KB |
Output is correct |
| 94 |
Correct |
656 ms |
57352 KB |
Output is correct |
| 95 |
Correct |
616 ms |
57352 KB |
Output is correct |
| 96 |
Correct |
646 ms |
57352 KB |
Output is correct |
| 97 |
Correct |
779 ms |
57352 KB |
Output is correct |
| 98 |
Correct |
629 ms |
57352 KB |
Output is correct |
| 99 |
Correct |
589 ms |
57352 KB |
Output is correct |
| 100 |
Correct |
719 ms |
57352 KB |
Output is correct |
