#include <bits/stdc++.h>
using namespace std;
#define fastIO ios_base::sync_with_stdio(false), cin.tie(NULL)
#define forw(i,l,r) for(int i=l; i<r; i++)
#define fore(i,l,r) for(int i=l; i<=r; i++)
#define forb(i,r,l) for(int i=r; i>=l; i--)
#define rep(i,n) forw(i,0,n)
#define Pi acos(-1.0)
#define mp make_pair
#define ins insert
#define fi first
#define se second
#define pb push_back
#define pob pop_back
#define pf push_front
#define pof pop_front
#define sz(a) (a.size())
#define all(a) a.begin(), a.end()
#define numZeroBitStart(x) (__builtin_clz(x))
#define numZeroBitEnd(x) (__builtin_ctz(x))
#define numOneBit(x) (__builtin_popcount(x))
#define parityOfNumOneBit(x) (__builtin_parity(x))
typedef long long ll;
typedef unsigned long long int ull;
typedef pair<int,int> ii;
typedef pair<int,ll> ill;
typedef pair<ll,int> lli;
typedef pair<ll,ll> lll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<ii> vii;
typedef vector<ll> vll;
template <class X, class Y>
bool maximize(X &x, const Y &y){
X eps=1e-9;
if(x+eps<y){
x=y; return true;
}
return false;
}
template <class X, class Y>
bool minimize(X &x, const Y &y){
X eps=1e-9;
if(x>y+eps){
x=y; return true;
}
return false;
}
/*-----------------MAIN PROGRAM-----------------*/
const int SZ=3007;
int r, c ,h, w;
int a[SZ][SZ], b[SZ][SZ];
void read(){
cin>>r>>c>>h>>w;
fore(i,1,r) fore(j,1,c) cin>>a[i][j];
}
bool good(int med){
fore(i,1,r) fore(j,1,c){
if(a[i][j]>med) b[i][j]=1;
else if(a[i][j]<med) b[i][j]=-1;
else b[i][j]=0;
b[i][j]+=b[i-1][j]+b[i][j-1]-b[i-1][j-1];
}
fore(i,1,r-h+1) fore(j,1,c-w+1){
int tot=b[i+h-1][j+w-1]-b[i+h-1][j-1]
-b[i-1][j+w-1]+b[i-1][j-1];
if(tot<=0) return true;
}
return false;
}
void solve(){
int left=1, right=r*c, ans;
while(left<=right){
int m=(left+right)/2;
if(good(m)){
ans=m;
right=m-1;
}
else left=m+1;
}
cout<<ans;
}
int main(){
fastIO;
read();
solve();
return 0;
}
Compilation message
quality.cpp: In function 'void solve()':
quality.cpp:92:11: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized]
92 | cout<<ans;
| ^~~
/usr/bin/ld: /tmp/ccvbRODF.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/cct6zxnG.o:quality.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/ccvbRODF.o: in function `main':
grader.cpp:(.text.startup+0xe9): undefined reference to `rectangle(int, int, int, int, int (*) [3001])'
collect2: error: ld returned 1 exit status
