oj.uz

Submission #332873

# Submission time Handle Problem Language Result Execution time Memory
332873 2020-12-03T22:44:47 Z limabeans The Kingdom of JOIOI (JOI17_joioi) C++17
15 / 100
 4000 ms 512 KB 
#include <bits/stdc++.h>
using namespace std;

template<typename T>
void out(T x) { cout << x << endl; exit(0); }
#define watch(x) cout << (#x) << " is " << (x) << endl





using ll = long long;

const ll inf = 1e18;
const int maxn = 2020;


int n,m;
ll g[maxn][maxn];
ll tmp[maxn][maxn];



bool test(ll diff) {
    ll mn = inf;
    ll mx = -inf;
    for (int i=0; i<n; i++) {
	for (int j=0; j<m; j++) {
	    mn = min(mn, g[i][j]);
	    mx = max(mx, g[i][j]);
	}
    }
    {
	int sep = 0;
	bool ok = true;
	for (int i=0; i<n; i++) {
	    for (int j=0; j<m; j++) {
		if (g[i][j]<mx-diff) {
		    sep = max(sep,j+1);
		}
	    }
	    for (int j=0; j<m; j++) {
		if (g[i][j]>mn+diff) {
		    if (j<sep) ok = false;
		}
	    }
	}
	if (ok) return true;
    }

    {
	int sep = 0;
	bool ok = true;
	for (int i=0; i<n; i++) {
	    for (int j=0; j<m; j++) {
		if (g[i][j]>mn+diff) {
		    sep = max(sep,j+1);
		}
	    }
	    for (int j=0; j<m; j++) {
		if (g[i][j]<mx-diff) {
		    if (j<sep) ok = false;
		}
	    }
	}
	if (ok) return true;
    }

    return false;
}

ll solve() {
    ll mn = inf;
    ll mx = -inf;
    vector<ll> a;
    for (int i=0; i<n; i++) {
	for (int j=0; j<m; j++) {
	    a.push_back(g[i][j]);
	    mn = min(mn, g[i][j]);
	    mx = max(mx, g[i][j]);
	}
    }

    sort(a.begin(),a.end());

    ll res = inf;

    for (ll x: a) {
	for (ll y: a) {
	    if (x<y) {
		if (test(y-x)) {
		    res = min(res, y-x);
		}
	    }
	}
    }

    return res;
}


void flipY() {
    for (int i=0; i<n; i++) {
	for (int j=0; j<m/2; j++) {
	    swap(g[i][j],g[i][m-j-1]);
	}
    }
}

void transpose() {
    for (int i=0; i<n; i++) {
	for (int j=0; j<m; j++) {
	    tmp[j][i]=g[i][j];
	}
    }
    swap(n,m);
    for (int i=0; i<n; i++) {
	for (int j=0; j<m; j++) {
	    g[i][j]=tmp[i][j];
	}
    }
}

int main() {
    ios_base::sync_with_stdio(false); cin.tie(0);  cout.tie(0);


    cin>>n>>m;
    for (int i=0; i<n; i++) {
	for (int j=0; j<m; j++) {
	    cin>>g[i][j];
	}
    }

    ll res = inf;
    res = min(res, solve());
    flipY();
    res = min(res, solve());
    flipY(); transpose();
    res = min(res, solve());
    flipY();
    res = min(res, solve());

    cout<<res<<endl;
    
    return 0;
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 364 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 18 ms 492 KB Output is correct
4 Correct 11 ms 384 KB Output is correct
5 Correct 15 ms 364 KB Output is correct
6 Correct 8 ms 384 KB Output is correct
7 Correct 15 ms 512 KB Output is correct
8 Correct 18 ms 364 KB Output is correct
9 Correct 17 ms 384 KB Output is correct
10 Correct 16 ms 364 KB Output is correct
11 Correct 17 ms 364 KB Output is correct
12 Correct 18 ms 364 KB Output is correct
13 Correct 17 ms 364 KB Output is correct
14 Correct 17 ms 364 KB Output is correct

Subtask #2
0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 364 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 18 ms 492 KB Output is correct
4 Correct 11 ms 384 KB Output is correct
5 Correct 15 ms 364 KB Output is correct
6 Correct 8 ms 384 KB Output is correct
7 Correct 15 ms 512 KB Output is correct
8 Correct 18 ms 364 KB Output is correct
9 Correct 17 ms 384 KB Output is correct
10 Correct 16 ms 364 KB Output is correct
11 Correct 17 ms 364 KB Output is correct
12 Correct 18 ms 364 KB Output is correct
13 Correct 17 ms 364 KB Output is correct
14 Correct 17 ms 364 KB Output is correct
15 Execution timed out 4077 ms 492 KB Time limit exceeded
16 Halted 0 ms 0 KB -

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 364 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 18 ms 492 KB Output is correct
4 Correct 11 ms 384 KB Output is correct
5 Correct 15 ms 364 KB Output is correct
6 Correct 8 ms 384 KB Output is correct
7 Correct 15 ms 512 KB Output is correct
8 Correct 18 ms 364 KB Output is correct
9 Correct 17 ms 384 KB Output is correct
10 Correct 16 ms 364 KB Output is correct
11 Correct 17 ms 364 KB Output is correct
12 Correct 18 ms 364 KB Output is correct
13 Correct 17 ms 364 KB Output is correct
14 Correct 17 ms 364 KB Output is correct
15 Execution timed out 4077 ms 492 KB Time limit exceeded
16 Halted 0 ms 0 KB -