Created
September 3, 2012 04:15
-
-
Save diego9627/3606703 to your computer and use it in GitHub Desktop.
Quality of Life
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#include<iostream> | |
using namespace std; | |
int Q[3001][3001],I[3001][3001],R,C,N,H,W,T; | |
void BI1(int k,int i){ | |
I[i][0]=(Q[i][0]>k)? 0:1; | |
for(int j=1;j<C;j++){ | |
I[i][j]=((Q[i][j]>k)? 0:1)+I[i][j-1]; | |
} | |
} | |
void BI2(int k, int j){ | |
for(int i=1;i<R;i++){ | |
I[i][j]+=I[i-1][j]; | |
} | |
} | |
int cuan(int i,int j){ | |
int t=0; | |
t+=I[i+H-1][j+W-1]; | |
if(i>0) t-=I[i-1][j+W-1]; | |
if(j>0) t-=I[i+H-1][j-1]; | |
if(i>0&&j>0) t+=I[i-1][j-1]; | |
return t; | |
} | |
int tst(int m){ | |
for(int i=0;i<R-H+1; i++) for(int j=0;j<C-W+1;j++){ | |
if(cuan(i,j)>T) return 1; | |
} | |
return 0; | |
} | |
int BB(int a,int b){ | |
int m; | |
m=(a+b)/2; | |
if(a!=b){ | |
for(int i=0;i<R;i++){ | |
BI1(m,i); | |
} | |
for(int j=0;j<C;j++){ | |
BI2(m,j); | |
} | |
if(tst(m)==0) return BB(m+1,b); | |
else return BB(a,m); | |
} | |
else{ | |
return a; | |
} | |
} | |
int main (){ | |
int i,j; | |
cin >> R >> C >> H >> W; | |
for(i=0;i<R;i++) for(j=0;j<C;j++) cin >> Q[i][j]; | |
T=(H*W-1)/2; | |
N=R*C; | |
cout << BB(1,N); | |
return 0; | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment