oj.uz

Submission #372839

# Submission time Handle Problem Language Result Execution time Memory
372839 2021-03-01T23:33:46 Z AmineWeslati The Kingdom of JOIOI (JOI17_joioi) C++14
60 / 100
 4000 ms 95024 KB 
//Never stop trying
#include "bits/stdc++.h"
using namespace std;
#define boost ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0)

typedef long long ll;
typedef string str;
typedef long double ld;
typedef pair<int, int> pi;
#define fi first
#define se second
typedef vector<int> vi;
typedef vector<pi> vpi;
#define pb push_back
#define eb emplace_back
#define sz(x) (int)x.size()
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
#define endl "\n"
#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define ROF(i,a,b) for (int i = (b)-1; i >= (a); --i)

const int MOD = 1e9 + 7; //998244353
const ll INF = 1e9;
const int MX = 2000 + 10;
const int nx[4] = {0, 0, 1, -1}, ny[4] = {1, -1, 0, 0}; //right left down up

template<class T> using V = vector<T>;
template<class T> bool ckmin(T& a, const T& b) { return a > b ? a = b, 1 : 0; }
template<class T> bool ckmax(T& a, const T& b) { return a < b ? a = b, 1 : 0; }
ll cdiv(ll a, ll b) { return a / b + ((a ^ b) > 0 && a % b); } // divide a by b rounded up
//constexpr int log2(int x) { return 31 - __builtin_clz(x); } // floor(log2(x))

mt19937 rng(chrono::system_clock::now().time_since_epoch().count());
//mt19937_64 rng(chrono::system_clock::now().time_since_epoch().count());
ll random(ll a, ll b){
    return a + rng() % (b - a + 1);
}
#ifndef LOCAL  
#define cerr if(false) cerr
#endif
#define dbg(x) cerr << #x << " : " << x << endl; 
#define dbgs(x,y) cerr << #x << " : " << x << " / " << #y << " : " << y << endl;
#define dbgv(v) cerr << #v << " : " << "[ "; for(auto it : v) cerr << it << ' '; cerr << ']' << endl;
#define here() cerr << "here" << endl;

void IO() {
#ifdef LOCAL
    freopen("input.txt", "r", stdin); 
    freopen("output.txt", "w", stdout);
#endif
}
/////////////////////////ONLY CLEAN CODES ALLOWED/////////////////////////


int N,M,mn=INF,mx=-INF;
V<vi>g[4],gg;

bool solve(int d, int K){
	int top=-1;

	bool ok=1;
	FOR(j,0,sz(g[d][0])){
		ROF(i,0,sz(g[d])) if(!(g[d][i][j]>=mx-K)){
			ckmax(top,i);
			break;
		}
		FOR(i,0,top+1) if(!(g[d][i][j]<=mn+K)){
			ok=0;
		}
	}
	if(ok) return 1;

	/*ok=1;
	ROF(j,0,sz(g[d][0])){
		ROF(i,0,sz(g[d])) if(!(g[d][i][j]>=mx-K)){
			ckmax(top,i);
			break;
		}
		FOR(i,0,top+1) if(!(g[d][i][j]<=mn+K)){
			ok=0;
		}
	}*/
	return ok;
}


void rotate(){
	int n=sz(gg),m=sz(gg[0]); 

	V<vi>ggg; 
	ggg.resize(m); 
    FOR(i,0,m) ggg[i].resize(n);

    FOR(i,0,n) FOR(j,0,m){
    	ggg[j][n-1-i]=gg[i][j];
    }

    gg.resize(m);
    FOR(i,0,m) gg[i].assign(all(ggg[i]));
}

bool check(int K){
	FOR(i,0,4){
		if(solve(i,K)) return 1;
	}
	return 0;
}

void precompute(){
	FOR(i,0,4){
		g[i].resize(sz(gg));
		FOR(r,0,sz(gg)){
			g[i][r].assign(all(gg[r]));
		}

		rotate();
	}
}

int main() {
    boost; IO();

    cin>>N>>M;

    gg.resize(N); 
    FOR(i,0,N) gg[i].resize(M);
    FOR(i,0,N) FOR(j,0,M){
    	cin>>gg[i][j];
    	ckmin(mn,gg[i][j]);
    	ckmax(mx,gg[i][j]);
	}

	precompute();

	int l=0,r=mx-mn,ans;
	while(l<=r){
		int m=(l+r)/2;
		if(check(m)){
			ans=m;
			r=m-1;
		}
		else l=m+1;
	}
	cout << ans << endl;


    return 0;
}
//Change your approach

Compilation message

joioi.cpp: In function 'int main()':
joioi.cpp:19:14: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized]
   19 | #define endl "\n"
      |              ^~~~
joioi.cpp:136:18: note: 'ans' was declared here
  136 |  int l=0,r=mx-mn,ans;
      |                  ^~~

Subtask #1
15.0 / 15.0

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

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 236 KB Output is correct
16 Correct 5 ms 1372 KB Output is correct
17 Correct 12 ms 1700 KB Output is correct
18 Correct 9 ms 1620 KB Output is correct
19 Correct 10 ms 1572 KB Output is correct
20 Correct 10 ms 1512 KB Output is correct
21 Correct 12 ms 1700 KB Output is correct
22 Correct 12 ms 1748 KB Output is correct
23 Correct 10 ms 1700 KB Output is correct
24 Correct 11 ms 1780 KB Output is correct
25 Correct 10 ms 1720 KB Output is correct
26 Correct 13 ms 1700 KB Output is correct
27 Correct 13 ms 1700 KB Output is correct
28 Correct 13 ms 1700 KB Output is correct

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 236 KB Output is correct
16 Correct 5 ms 1372 KB Output is correct
17 Correct 12 ms 1700 KB Output is correct
18 Correct 9 ms 1620 KB Output is correct
19 Correct 10 ms 1572 KB Output is correct
20 Correct 10 ms 1512 KB Output is correct
21 Correct 12 ms 1700 KB Output is correct
22 Correct 12 ms 1748 KB Output is correct
23 Correct 10 ms 1700 KB Output is correct
24 Correct 11 ms 1780 KB Output is correct
25 Correct 10 ms 1720 KB Output is correct
26 Correct 13 ms 1700 KB Output is correct
27 Correct 13 ms 1700 KB Output is correct
28 Correct 13 ms 1700 KB Output is correct
29 Correct 2971 ms 90844 KB Output is correct
30 Correct 3134 ms 89080 KB Output is correct
31 Correct 3344 ms 94784 KB Output is correct
32 Correct 3718 ms 95024 KB Output is correct
33 Correct 2539 ms 84272 KB Output is correct
34 Correct 3687 ms 94896 KB Output is correct
35 Execution timed out 4049 ms 94768 KB Time limit exceeded
36 Halted 0 ms 0 KB -