oj.uz

Submission #39584

# Submission time Handle Problem Language Result Execution time Memory
39584 2018-01-16T16:15:18 Z comtalyst The Kingdom of JOIOI (JOI17_joioi) C++14
100 / 100
 1296 ms 88392 KB 
/*
 *	Task: JOI17_JOIOI
 *	Lang: C/C++11
 *	Author: comtalyst
 *	Site: oj.uz
 *	Last Update: 16/1/2018
 */

#include <bits/stdc++.h>
//#pragma GCC optimize ("O3")
using namespace std;

/* Note
----------------------------
Learned : 
Bugs found & solved :
- task description misunderstood
- bad rotation (forgot to swap n,m)
Optimizations :
----------------------------
*/	

#define x first
#define y second
#define umap unordered_map
#define pqueue priority_queue
#define mset multiset
#define mp make_pair
#define mt make_tuple
#define long long long
#define MOD 1000000007
#define MAX (int)2e9
#define MIN (int)-2e9
#define FILEIN_ freopen("__in.txt","r",stdin)
#define FILEOUT_ freopen("__out.txt","w",stdout)
#define FILEIN(text) freopen(text,"r",stdin)
#define FILEOUT(text) freopen(text,"w",stdout)

bool chk[2][2005][2005];
int n,m,field[5][2005][2005],need[2005];

main(){
	int t,i,j,k,x,y,l,r,mid,res=MAX,nx,ny,lst,v;
	bool ok;
	pair<int,pair<int,int>> mn={MAX,{MAX,MAX}},mx={MIN,{MIN,MIN}};
	
	scanf("%d %d",&n,&m);
	for(i = 1; i <= n; i++){
		for(j = 1; j <= m; j++){
			scanf("%d",&field[1][i][j]);
			mn = min(mn,{field[1][i][j],{i,j}});
			mx = max(mx,{field[1][i][j],{i,j}});
		}
	}
	for(k = 1; k <= 3; k++){
		x = 1;
		y = n;
		for(i = 1; i <= n; i++){
			x = 1;
			for(j = 1; j <= m; j++){
				field[k+1][x][y] = field[k][i][j];
				x++;
			}
			y--;
		}
		swap(n,m);
	}
	swap(n,m);
	l = 0; 
	r = mx.x-mn.x;
	while(l <= r){
		mid = (l+r)/2;
		for(k = 1; k <= 4; k++){
			for(i = 1; i <= n; i++){
				need[i] = 0;
				for(j = m; j >= 1; j--){
					if(field[k][i][j] < mx.x-mid){
						need[i] = j;
						break;
					}
				}
			}
			ok = true;
			lst = 0;
			for(i = 1; i <= n; i++){
				for(j = 1; j <= max(need[i],lst); j++){
					if(field[k][i][j] > mn.x+mid){
						ok = false;
						break;
					}
				}
				lst = max(lst,need[i]);
				if(!ok) break;
			}
			if(ok){
				break;
			}
			ok = true;
			lst = 0;
			for(i = n; i >= 1; i--){
				for(j = 1; j <= max(need[i],lst); j++){
					if(field[k][i][j] > mn.x+mid){
						ok = false;
						break;
					}
				}
				lst = max(lst,need[i]);
				if(!ok) break;
			}
			if(ok){
				break;
			}
			swap(n,m);
		}
		if(k%2 == 0){
			swap(n,m);
		}
		if(ok){
			res = min(res,mid);
			r = mid-1;
		}
		else{
			l = mid+1;
		}
	}
	printf("%d\n",res);

	return 0;	
}

Compilation message

joioi.cpp:42:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main(){
      ^
joioi.cpp: In function 'int main()':
joioi.cpp:43:6: warning: unused variable 't' [-Wunused-variable]
  int t,i,j,k,x,y,l,r,mid,res=MAX,nx,ny,lst,v;
      ^
joioi.cpp:43:34: warning: unused variable 'nx' [-Wunused-variable]
  int t,i,j,k,x,y,l,r,mid,res=MAX,nx,ny,lst,v;
                                  ^
joioi.cpp:43:37: warning: unused variable 'ny' [-Wunused-variable]
  int t,i,j,k,x,y,l,r,mid,res=MAX,nx,ny,lst,v;
                                     ^
joioi.cpp:43:44: warning: unused variable 'v' [-Wunused-variable]
  int t,i,j,k,x,y,l,r,mid,res=MAX,nx,ny,lst,v;
                                            ^
joioi.cpp:47:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d",&n,&m);
                      ^
joioi.cpp:50:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d",&field[1][i][j]);
                               ^

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 88392 KB Output is correct
2 Correct 0 ms 88392 KB Output is correct
3 Correct 0 ms 88392 KB Output is correct
4 Correct 0 ms 88392 KB Output is correct
5 Correct 0 ms 88392 KB Output is correct
6 Correct 0 ms 88392 KB Output is correct
7 Correct 0 ms 88392 KB Output is correct
8 Correct 0 ms 88392 KB Output is correct
9 Correct 0 ms 88392 KB Output is correct
10 Correct 0 ms 88392 KB Output is correct
11 Correct 0 ms 88392 KB Output is correct
12 Correct 0 ms 88392 KB Output is correct
13 Correct 0 ms 88392 KB Output is correct
14 Correct 0 ms 88392 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 88392 KB Output is correct
2 Correct 0 ms 88392 KB Output is correct
3 Correct 0 ms 88392 KB Output is correct
4 Correct 0 ms 88392 KB Output is correct
5 Correct 0 ms 88392 KB Output is correct
6 Correct 0 ms 88392 KB Output is correct
7 Correct 0 ms 88392 KB Output is correct
8 Correct 0 ms 88392 KB Output is correct
9 Correct 0 ms 88392 KB Output is correct
10 Correct 0 ms 88392 KB Output is correct
11 Correct 0 ms 88392 KB Output is correct
12 Correct 0 ms 88392 KB Output is correct
13 Correct 0 ms 88392 KB Output is correct
14 Correct 0 ms 88392 KB Output is correct
15 Correct 0 ms 88392 KB Output is correct
16 Correct 3 ms 88392 KB Output is correct
17 Correct 6 ms 88392 KB Output is correct
18 Correct 9 ms 88392 KB Output is correct
19 Correct 13 ms 88392 KB Output is correct
20 Correct 9 ms 88392 KB Output is correct
21 Correct 9 ms 88392 KB Output is correct
22 Correct 13 ms 88392 KB Output is correct
23 Correct 9 ms 88392 KB Output is correct
24 Correct 13 ms 88392 KB Output is correct
25 Correct 13 ms 88392 KB Output is correct
26 Correct 16 ms 88392 KB Output is correct
27 Correct 9 ms 88392 KB Output is correct
28 Correct 13 ms 88392 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 88392 KB Output is correct
2 Correct 0 ms 88392 KB Output is correct
3 Correct 0 ms 88392 KB Output is correct
4 Correct 0 ms 88392 KB Output is correct
5 Correct 0 ms 88392 KB Output is correct
6 Correct 0 ms 88392 KB Output is correct
7 Correct 0 ms 88392 KB Output is correct
8 Correct 0 ms 88392 KB Output is correct
9 Correct 0 ms 88392 KB Output is correct
10 Correct 0 ms 88392 KB Output is correct
11 Correct 0 ms 88392 KB Output is correct
12 Correct 0 ms 88392 KB Output is correct
13 Correct 0 ms 88392 KB Output is correct
14 Correct 0 ms 88392 KB Output is correct
15 Correct 0 ms 88392 KB Output is correct
16 Correct 3 ms 88392 KB Output is correct
17 Correct 6 ms 88392 KB Output is correct
18 Correct 9 ms 88392 KB Output is correct
19 Correct 13 ms 88392 KB Output is correct
20 Correct 9 ms 88392 KB Output is correct
21 Correct 9 ms 88392 KB Output is correct
22 Correct 13 ms 88392 KB Output is correct
23 Correct 9 ms 88392 KB Output is correct
24 Correct 13 ms 88392 KB Output is correct
25 Correct 13 ms 88392 KB Output is correct
26 Correct 16 ms 88392 KB Output is correct
27 Correct 9 ms 88392 KB Output is correct
28 Correct 13 ms 88392 KB Output is correct
29 Correct 796 ms 88392 KB Output is correct
30 Correct 886 ms 88392 KB Output is correct
31 Correct 856 ms 88392 KB Output is correct
32 Correct 1039 ms 88392 KB Output is correct
33 Correct 696 ms 88392 KB Output is correct
34 Correct 836 ms 88392 KB Output is correct
35 Correct 1269 ms 88392 KB Output is correct
36 Correct 1133 ms 88392 KB Output is correct
37 Correct 1296 ms 88392 KB Output is correct