oj.uz

Submission #37651

# Submission time Handle Problem Language Result Execution time Memory
37651 2017-12-26T16:18:38 Z Kerim Bomb (IZhO17_bomb) C++14
41 / 100
 1000 ms 57168 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=2505;
char arr[N][N];
int zero[N][N],n,m,vis[N][N];
int get(int x,int y,int xx,int yy){
	return zero[xx][yy]-zero[xx][y-1]-zero[x-1][yy]+zero[x-1][y-1];
}
bool ok(int x,int y){
	for(int i=1;i<=n;i++)
		for(int j=1;j<=m;j++)
			vis[i][j]=0;
	for(int i=1;i+x-1<=n;i++)
		for(int j=1;j+y-1<=m;j++)
			if(!get(i,j,i+x-1,j+y-1)){
				vis[i+x-1][j+y-1]++;
				vis[i-1][j-1]++;
				vis[i+x-1][j-1]--;
				vis[i-1][j+y-1]--;
			}
	for(int i=n;i>=1;i--)
		for(int j=m;j>=1;j--){
			vis[i][j]+=vis[i+1][j]+vis[i][j+1]-vis[i+1][j+1];
			if(!vis[i][j] and arr[i][j]=='1')
				return 0;
		}
	return 1;	
}
int main(){
    //~ freopen("file.in", "r", stdin);
    scanf("%d%d",&n,&m);
    for(int i=1;i<=n;i++)
		for(int j=1;j<=m;j++){
			char c;
			scanf(" %c",&c);
			if(c=='0')
				zero[i][j]++;
			zero[i][j]+=zero[i-1][j]+zero[i][j-1]-zero[i-1][j-1];	
			arr[i][j]=c;
		}
	if(get(1,1,n,m)==n*m){
		puts("0");
		return 0;
	}		
	int p=0;		
	for(int i=m;i>=1;i--)		
		if(ok(1,i)){
			p=i;
			break;
		}
	int ans=p;	
	for(int i=2;i<=n;i++){
		while(p>=1 and !ok(i,p))
			p--;
		if(p>=1 and ok(i,p))
			umax(ans,i*p);
	}	
	printf("%d\n",ans);
	return 0;
}

Compilation message

bomb.cpp: In function 'int main()':
bomb.cpp:48:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&n,&m);
                        ^
bomb.cpp:52:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf(" %c",&c);
                   ^

Subtask #1
41.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 57168 KB Output is correct
2 Correct 0 ms 57168 KB Output is correct
3 Correct 9 ms 57168 KB Output is correct
4 Correct 19 ms 57168 KB Output is correct
5 Correct 6 ms 57168 KB Output is correct
6 Correct 3 ms 57168 KB Output is correct
7 Correct 0 ms 57168 KB Output is correct
8 Correct 0 ms 57168 KB Output is correct
9 Correct 0 ms 57168 KB Output is correct
10 Correct 0 ms 57168 KB Output is correct
11 Correct 0 ms 57168 KB Output is correct
12 Correct 0 ms 57168 KB Output is correct
13 Correct 0 ms 57168 KB Output is correct
14 Correct 0 ms 57168 KB Output is correct
15 Correct 0 ms 57168 KB Output is correct
16 Correct 0 ms 57168 KB Output is correct
17 Correct 0 ms 57168 KB Output is correct
18 Correct 0 ms 57168 KB Output is correct
19 Correct 3 ms 57168 KB Output is correct
20 Correct 3 ms 57168 KB Output is correct
21 Correct 3 ms 57168 KB Output is correct
22 Correct 3 ms 57168 KB Output is correct
23 Correct 3 ms 57168 KB Output is correct
24 Correct 3 ms 57168 KB Output is correct
25 Correct 6 ms 57168 KB Output is correct
26 Correct 3 ms 57168 KB Output is correct
27 Correct 49 ms 57168 KB Output is correct
28 Correct 219 ms 57168 KB Output is correct
29 Correct 273 ms 57168 KB Output is correct
30 Correct 543 ms 57168 KB Output is correct
31 Correct 379 ms 57168 KB Output is correct
32 Correct 399 ms 57168 KB Output is correct
33 Correct 676 ms 57168 KB Output is correct
34 Correct 116 ms 57168 KB Output is correct
35 Correct 563 ms 57168 KB Output is correct
36 Correct 546 ms 57168 KB Output is correct
37 Correct 0 ms 57168 KB Output is correct
38 Execution timed out 1000 ms 57168 KB Execution timed out
39 Correct 0 ms 57168 KB Output is correct
40 Execution timed out 1000 ms 57168 KB Execution timed out
41 Correct 0 ms 57168 KB Output is correct
42 Correct 6 ms 57168 KB Output is correct
43 Execution timed out 1000 ms 57168 KB Execution timed out
44 Correct 836 ms 57168 KB Output is correct
45 Execution timed out 1000 ms 57168 KB Execution timed out
46 Execution timed out 1000 ms 57168 KB Execution timed out
47 Execution timed out 1000 ms 57168 KB Execution timed out
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