Submission #339173

#	Time	Username	Problem	Language	Result	Execution time	Memory
339173		Atill83	The Kingdom of JOIOI (JOI17_joioi)	C++14	100 / 100	974 ms	70840 KiB

joioi

#include <bits/stdc++.h>
#define ff first
#define ss second
#define endl '\n'
using namespace std;
const long long INF = (long long) 1e18;
const int mod = (int) 1e9+7;
const int MAXN = (int) 2e3+5;

typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
ll h, w;
int mx = 0, mn = mod;
int g[MAXN][MAXN], ot[MAXN][MAXN];
inline void turn(){
    for(int i = 0; i < h; i++)
        for(int j = 0; j < w; j++)
            ot[j][h - 1 - i] = g[i][j];

    swap(h, w);
    for(int i = 0; i < h; i++)
        for(int j = 0; j < w; j++)
            g[i][j] = ot[i][j];
}

inline bool check(int del){
    int sn = 0;
    for(int i = 0; i < h; i++){

        for(int j = 0; j < w; j++){
            if(g[i][j] < mx - del)
                sn = max(sn, j + 1);
        }
    
        for(int j = 0; j < sn; j++){
            if(g[i][j] > mn + del)
                return 0;
        }
        
    }
    return 1;
}




int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);cout.tie(nullptr);

    #ifdef Local
        freopen("C:/Users/Admin/Desktop/Yazilim/C/IO/int.txt","r",stdin);
        freopen("C:/Users/Admin/Desktop/Yazilim/C/IO/out.txt","w",stdout);
    #endif

    cin>>h>>w;

    for(int i = 0; i < h; i++)
        for(int j = 0; j < w; j++){
            cin>>g[i][j];
            mx = max(mx, g[i][j]);
            mn = min(mn, g[i][j]);
        }


    int ans = mod;
    int cn = 0;
    do{
        int l = 0, r = (int) 1e9;
        while(l < r){
            int m = (l + r) / 2;
            if(check(m))
                r = m;
            else
                l = m + 1;
        }
        
        ans = min(ans, l);
        turn();
    } while(++cn < 4);
    cout<<ans<<endl;
    

    #ifdef Local
        cout<<endl<<fixed<<setprecision(2)<<1000.0 * clock() / CLOCKS_PER_SEC<< " milliseconds ";
    #endif
}

• Subtask 1: 15 / 15
• Subtask 2: 45 / 45
• Subtask 3: 40 / 40