oj.uz

Submission #709214

# Submission time Handle Problem Language Result Execution time Memory
709214 2023-03-13T08:30:47 Z myrcella The Kingdom of JOIOI (JOI17_joioi) C++17
100 / 100
 3403 ms 54936 KB 
//by szh
#include<bits/stdc++.h>
using namespace std;

#define fi first
#define se second
#define pii pair<int,int>
#define pll pair<long long,long long>
#define pb push_back
#define debug(x) cerr<<#x<<"="<<x<<endl
#define pq priority_queue
#define inf 0x3f
#define rep(i,a,b) for (int i=a;i<(b);i++)
#define MP make_pair
#define SZ(x) (int(x.size()))
#define ll long long
#define mod 1000000007
#define ALL(x) x.begin(),x.end()
void inc(int &a,int b) {a=(a+b)%mod;}
void dec(int &a,int b) {a=(a-b+mod)%mod;}
int lowbit(int x) {return x&(-x);}
ll p0w(ll base,ll p) {ll ret=1;while(p>0){if (p%2ll==1ll) ret=ret*base%mod;base=base*base%mod;p/=2ll;}return ret;}

const int maxn = 2010;

int n,m;
int grid[maxn][maxn];
int mn=mod,mx;
int pos[maxn];
int ans = 0;

bool check(int dif) {
	//mn on the top
	int lst = n-1;
	rep(i,0,m) {
		int cur = -1;
		while (cur+1<=lst and grid[cur+1][i]-mn<=dif) cur++;
		pos[i] = cur;
		lst = cur;
	}
	bool ok = false;
	rep(j,0,m) {
		rep(i,pos[j]+1,n) if (mx-grid[i][j]>dif) ok=true;
	}
	if (!ok) return true;
	
	lst = n-1;
	for (int i=m-1;i>=0;i--) {
		int cur = -1;
		while (cur+1<=lst and grid[cur+1][i]-mn<=dif) cur++;
		pos[i] = cur;
		lst = cur;
	}
	ok = false;
	rep(j,0,m) {
		rep(i,pos[j]+1,n) if (mx-grid[i][j]>dif) ok=true;
	}
	if (!ok) return true;
	
	//mx on the top
	lst = n-1;
	rep(i,0,m) {
		int cur = -1;
		while (cur+1<=lst and mx-grid[cur+1][i]<=dif) cur++;
		pos[i] = cur;
		lst = cur;
	}
	ok = false;
	rep(j,0,m) {
		rep(i,pos[j]+1,n) if (grid[i][j]-mn>dif) ok=true;
	}
	if (!ok) return true;
	
	lst = n-1;
	for (int i=m-1;i>=0;i--) {
		int cur = -1;
		while (cur+1<=lst and mx-grid[cur+1][i]<=dif) cur++;
		pos[i] = cur;
		lst = cur;
	}
	ok = false;
	rep(j,0,m) {
		rep(i,pos[j]+1,n) if (grid[i][j]-mn>dif) ok=true;
	}
	
	return !ok;
}

int main() {
//	freopen("input.txt","r",stdin);	
	std::ios::sync_with_stdio(false);cin.tie(0);
	cin>>n>>m;
	rep(i,0,n)
		rep(j,0,m) cin>>grid[i][j],mn = min(mn,grid[i][j]),mx = max(mx,grid[i][j]);
	int l = 0,r=1e9;
	while (l<r) {
		int mid=l+r>>1;
		if (check(mid)) r=mid;
		else l=mid+1;
	}
	cout<<l;
	return 0;
}

Compilation message

joioi.cpp: In function 'int main()':
joioi.cpp:97:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   97 |   int mid=l+r>>1;
      |           ~^~

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 4 ms 1296 KB Output is correct
17 Correct 8 ms 1492 KB Output is correct
18 Correct 7 ms 1500 KB Output is correct
19 Correct 8 ms 1576 KB Output is correct
20 Correct 9 ms 1440 KB Output is correct
21 Correct 10 ms 1620 KB Output is correct
22 Correct 10 ms 1620 KB Output is correct
23 Correct 9 ms 1604 KB Output is correct
24 Correct 8 ms 1492 KB Output is correct
25 Correct 9 ms 1624 KB Output is correct
26 Correct 11 ms 1620 KB Output is correct
27 Correct 9 ms 1692 KB Output is correct
28 Correct 10 ms 1688 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 4 ms 1296 KB Output is correct
17 Correct 8 ms 1492 KB Output is correct
18 Correct 7 ms 1500 KB Output is correct
19 Correct 8 ms 1576 KB Output is correct
20 Correct 9 ms 1440 KB Output is correct
21 Correct 10 ms 1620 KB Output is correct
22 Correct 10 ms 1620 KB Output is correct
23 Correct 9 ms 1604 KB Output is correct
24 Correct 8 ms 1492 KB Output is correct
25 Correct 9 ms 1624 KB Output is correct
26 Correct 11 ms 1620 KB Output is correct
27 Correct 9 ms 1692 KB Output is correct
28 Correct 10 ms 1688 KB Output is correct
29 Correct 1641 ms 37356 KB Output is correct
30 Correct 2075 ms 37576 KB Output is correct
31 Correct 2532 ms 39200 KB Output is correct
32 Correct 2282 ms 39156 KB Output is correct
33 Correct 1368 ms 34184 KB Output is correct
34 Correct 2197 ms 39272 KB Output is correct
35 Correct 3403 ms 54728 KB Output is correct
36 Correct 2314 ms 49532 KB Output is correct
37 Correct 3016 ms 54936 KB Output is correct