oj.uz

답안 #118140

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
118140 2019-06-18T08:47:42 Z JohnTitor The Kingdom of JOIOI (JOI17_joioi) C++11
100 / 100
 1022 ms 70616 KB 
#include <bits/stdc++.h>
using namespace std;
#define FOR(i, j, k) for(int i=(j); i<=(k); i++)
#define FFOR(i, j, k) for(int i=(j); i<(k); i++)
#define DFOR(i, j, k) for(int i=(j); i>=(k); i--)
#define bug(x) cerr<<#x<<" = "<<(x)<<'\n'
#define pb push_back
#define mp make_pair
#define bit(s, i) (((s)>>(i))&1LL)
#define mask(i) ((1LL<<(i)))
#define builtin_popcount __builtin_popcountll
#define __builtin_popcount __builtin_popcountll
using ll=long long; using ld=long double;
mt19937_64 rng(chrono::high_resolution_clock::now().time_since_epoch().count()); const ld pi=acos(0)*2;
template <typename T> inline void read(T &x){char c; bool nega=0; while((!isdigit(c=getchar()))&&(c!='-')); if(c=='-'){nega=1; c=getchar();} x=c-48; while(isdigit(c=getchar())) x=x*10+c-48; if(nega) x=-x;}
template <typename T> inline void writep(T x){if(x>9) writep(x/10); putchar(x%10+48);}
template <typename T> inline void write(T x){if(x<0){ putchar('-'); x=-x;} writep(x);}
template <typename T> inline void writeln(T x){write(x); putchar('\n');}
#define taskname "Kingdom"
int h, w;
int a[2001][2001];
int mx, mi=1e9;
int f[2001][2001];
bool check(int dist){
    FOR(i, 1, h) FOR(j, 1, w) f[i][j]=0;
    FOR(i, 1, h) FOR(j, 1, w){
        if(mx-a[i][j]<=dist) f[i][j]^=1;
        if(a[i][j]-mi<=dist) f[i][j]^=2;
        if(f[i][j]==0) return 0;
    }
    {
        bool goodlr=1;
        bool goodrl=1;
        int nowl=0;
        int nowr=w+1;
        FOR(i, 1, h){
            int l=0, r=w+1;
            DFOR(j, w, 1) if(f[i][j]==1){
                l=j;
                break;
            }
            FOR(j, 1, w) if(f[i][j]==2){
                r=j-1;
                break;
            }
//            cerr<<"a "<<i<<' '<<l<<' '<<r<<'\n';
            nowl=max(l, nowl);
            if(nowl>r){
                goodlr=0;
                if(goodrl==0) break;
            }
            nowr=min(r, nowr);
            if(nowr<l){
                goodrl=0;
                if(goodlr==0) break;
            }
        }
        if(goodrl||goodlr) return 1;
    }
    {
        bool goodlr=1;
        bool goodrl=1;
        int nowl=0;
        int nowr=w+1;
        FOR(i, 1, h){
            int l=0, r=w+1;
            DFOR(j, w, 1) if(f[i][j]==2){
                l=j;
                break;
            }
            FOR(j, 1, w) if(f[i][j]==1){
                r=j-1;
                break;
            }
//            cerr<<"b "<<i<<' '<<l<<' '<<r<<'\n';
            nowl=max(l, nowl);
            if(nowl>r){
                goodlr=0;
                if(goodrl==0) break;
            }
            nowr=min(r, nowr);
            if(nowr<l){
                goodrl=0;
                if(goodlr==0) break;
            }
        }
        if(goodrl||goodlr) return 1;
    }
    return 0;
}
int main(){
    #ifdef Aria
        if(fopen(taskname".in", "r"))
            freopen(taskname".in", "r", stdin);
    #endif // Aria
    read(h);
    read(w);
    FOR(i, 1, h) FOR(j, 1, w){
        read(a[i][j]);
        if(a[i][j]>mx) mx=a[i][j];
        if(a[i][j]<mi) mi=a[i][j];
    }
    int ans=mx-mi;
    int low=0, high=ans-1, mid;
//    bug(check(11));
//    bug(check(11));
//    bug(check(11));
//    bug(check(11));
//    bug(check(11));
    while(low<=high){
        mid=(low+high)/2;
//        bug(mid);
//        bug(check(mid));
        if(check(mid)){
            ans=mid;
            high=mid-1;
        }
        else low=mid+1;
    }
    writeln(ans);
}

Subtask #1
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 3 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 2 ms 384 KB Output is correct
6 Correct 2 ms 384 KB Output is correct
7 Correct 2 ms 384 KB Output is correct
8 Correct 2 ms 384 KB Output is correct
9 Correct 2 ms 384 KB Output is correct
10 Correct 2 ms 384 KB Output is correct
11 Correct 2 ms 384 KB Output is correct
12 Correct 3 ms 384 KB Output is correct
13 Correct 2 ms 384 KB Output is correct
14 Correct 2 ms 404 KB Output is correct

Subtask #2
45.0 / 45.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 3 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 2 ms 384 KB Output is correct
6 Correct 2 ms 384 KB Output is correct
7 Correct 2 ms 384 KB Output is correct
8 Correct 2 ms 384 KB Output is correct
9 Correct 2 ms 384 KB Output is correct
10 Correct 2 ms 384 KB Output is correct
11 Correct 2 ms 384 KB Output is correct
12 Correct 3 ms 384 KB Output is correct
13 Correct 2 ms 384 KB Output is correct
14 Correct 2 ms 404 KB Output is correct
15 Correct 10 ms 384 KB Output is correct
16 Correct 5 ms 2304 KB Output is correct
17 Correct 9 ms 2560 KB Output is correct
18 Correct 7 ms 2560 KB Output is correct
19 Correct 10 ms 2560 KB Output is correct
20 Correct 11 ms 2304 KB Output is correct
21 Correct 11 ms 2688 KB Output is correct
22 Correct 9 ms 2688 KB Output is correct
23 Correct 12 ms 2688 KB Output is correct
24 Correct 8 ms 2432 KB Output is correct
25 Correct 15 ms 2688 KB Output is correct
26 Correct 10 ms 2688 KB Output is correct
27 Correct 11 ms 2688 KB Output is correct
28 Correct 20 ms 2732 KB Output is correct

Subtask #3
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 3 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 2 ms 384 KB Output is correct
6 Correct 2 ms 384 KB Output is correct
7 Correct 2 ms 384 KB Output is correct
8 Correct 2 ms 384 KB Output is correct
9 Correct 2 ms 384 KB Output is correct
10 Correct 2 ms 384 KB Output is correct
11 Correct 2 ms 384 KB Output is correct
12 Correct 3 ms 384 KB Output is correct
13 Correct 2 ms 384 KB Output is correct
14 Correct 2 ms 404 KB Output is correct
15 Correct 10 ms 384 KB Output is correct
16 Correct 5 ms 2304 KB Output is correct
17 Correct 9 ms 2560 KB Output is correct
18 Correct 7 ms 2560 KB Output is correct
19 Correct 10 ms 2560 KB Output is correct
20 Correct 11 ms 2304 KB Output is correct
21 Correct 11 ms 2688 KB Output is correct
22 Correct 9 ms 2688 KB Output is correct
23 Correct 12 ms 2688 KB Output is correct
24 Correct 8 ms 2432 KB Output is correct
25 Correct 15 ms 2688 KB Output is correct
26 Correct 10 ms 2688 KB Output is correct
27 Correct 11 ms 2688 KB Output is correct
28 Correct 20 ms 2732 KB Output is correct
29 Correct 494 ms 52260 KB Output is correct
30 Correct 552 ms 53232 KB Output is correct
31 Correct 669 ms 54748 KB Output is correct
32 Correct 462 ms 54784 KB Output is correct
33 Correct 291 ms 48044 KB Output is correct
34 Correct 613 ms 55032 KB Output is correct
35 Correct 753 ms 70500 KB Output is correct
36 Correct 494 ms 65344 KB Output is correct
37 Correct 1022 ms 70616 KB Output is correct