Submission #1297944

#	Time	Username	Problem	Language	Result	Execution time	Memory
1297944		khoavn2008	Quality Of Living (IOI10_quality)	C++17	Compilation error	0 ms	0 KiB

quality

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ld long double
#define endl '\n'
#define fi first
#define se second
#define pb push_back
#define FOR(i,l,r) for(ll i=(l),_r=(r);i<=_r;i++)
#define FORNG(i,r,l) for(ll i=(r),_l=(l);i>=_l;i--)
#define MASK(i) (1LL<<(i))
#define BIT(x,i) (((x)>>(i))&1LL)
#define all(v) (v).begin(),(v).end()
#define sz(v) ((ll)(v).size())

const ll MOD = 1e9+7, N = 3001;

ll n,m,w,h,a[N][N],ans;
ll b[N][N];
bool check(ll x){
    FOR(i,1,n)FOR(j,1,m){
        b[i][j] = b[i][j-1] + b[i-1][j] - b[i-1][j-1] + (a[i][j]>=x?+1:-1);
        if(i>=w && j >= h){
            ll s = b[i][j] - b[i][j-h] - b[i-w][j] + b[i-w][j-h];
            if(s>=0)return 1;
        }
    }
    return 0;
}
int main(){
    //freopen(".INP", "r", stdin);
    //freopen(".OUT", "w", stdout);
    ios_base::sync_with_stdio(0);cin.tie(0);
    cin>>n>>m>>w>>h;
    FOR(i,1,n)FOR(j,1,m)cin>>a[i][j];
    ll l = 1, r = n*m;
    while(l <= r){
        ll mid = (l + r) >> 1;
        if(check(mid)){
            l = mid + 1;
            ans = mid;
        }else r = mid - 1;
    }
    cout<<ans;
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccbpdk1v.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccv3iVpd.o:quality.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/ccbpdk1v.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