oj.uz

Submission #29466

# Submission time Handle Problem Language Result Execution time Memory
29466 2017-07-19T11:55:16 Z PrOAhMeT The Kingdom of JOIOI (JOI17_joioi) C++14
15 / 100
 33 ms 111948 KB 
#include <bits/stdc++.h>
#define mp make_pair
#define pb push_back
#define pii pair<int,int>
#define LL long long
#define st first
#define nd second
#define endl '\n'
using namespace std;

const int MAXN=2005;
int a[MAXN][MAXN],n,m,ans=1e9,mx,mn,idx,l,r,add,mnn,b[MAXN][MAXN],used[MAXN*MAXN],rr;
int kk[MAXN][MAXN];
pair<int,pii> c[MAXN*MAXN];

void rotate1() {

	//cout<<"fuk"<<endl;
	for(int i=0;i<n;++i)
		for(int j=0;j<m;++j) {
			b[i][m-j-1]=a[i][j];
		}
	for(int i=0;i<n;++i)
		for(int j=0;j<m;++j) {
			a[i][j]=b[i][j];
		}
	for(int i=0;i<n;++i)
		for(int j=0;j<m;++j) {
			b[i][m-j-1]=kk[i][j];
		}
	for(int i=0;i<n;++i)
		for(int j=0;j<m;++j) {
			kk[i][j]=b[i][j];
		}

}

void rotate2() {

	for(int i=0;i<n;++i)
		for(int j=0;j<m;++j) {
			b[n-i-1][j]=a[i][j];
		}
	for(int i=0;i<n;++i)
		for(int j=0;j<m;++j) {
			a[i][j]=b[i][j];
		}
	for(int i=0;i<n;++i)
		for(int j=0;j<m;++j) {
			b[n-i-1][j]=kk[i][j];
		}
	for(int i=0;i<n;++i)
		for(int j=0;j<m;++j) {
			kk[i][j]=b[i][j];
		}

}

int solve() {

	memset(used,0,sizeof used);
	/*for(int i=0;i<n;++i) {
		for(int j=0;j<m;++j) {
			cout<<a[i][j]<<" ";
		}
		cout<<endl;
	}*/
	l=0,r=n*m-1;
	int ret=1e9;
	int x,y;
	mn=1e9+1;
	for(int i=0;i<n;++i)
		for(int j=0;j<m;++j) {
			if(mn>a[i][j]) {
				mn=a[i][j];
				x=i;
				y=j;
			}
		}
	//cout<<"xd"<<endl;
	mx=0;
	//cout<<x<<" "<<y<<" "<<mpp.size()<<endl;
	int up[MAXN];
	int cnt=0;
	memset(up,0,sizeof up);
	for(int j=0;j<=x;++j) {
		up[j]=y+1;
		for(int i=0;i<=y;++i)  {
				mx=max(mx,a[j][i]);
				used[kk[j][i]]=1;
				while(l!=r&&used[l])
					++l;
				while(l!=r&&used[r])
					--r;
				++cnt;
		}
	}
	priority_queue<pii> pq;
	for(int i=0;i<n;++i) {
		if(up[i]!=m) {
			if(i&&up[i]==up[i-1])
				continue;
			pq.push(mp(-a[i][up[i]],i));
		}
	}
	if(!pq.empty()) ret=min(ret,max(mx-mn,c[r].st-c[l].st));
	//cout<<"xd"<<endl;
	pii dd;
	int val;
	while(!pq.empty()) {
		add=-1,mnn=1e9+1;
		dd=pq.top();
		pq.pop();
		add=dd.nd;
		val=-dd.st;
		mx=max(mx,val);
		used[kk[add][up[add]]]=1;
		while(l!=r&&used[l])
			++l;
		while(l!=r&&used[r])
			--r;
		++up[add];
		if(up[add]!=m) {
			if(add!=0&&up[add]==up[add-1]);
			else pq.push(mp(-a[add][up[add]],add));
		}
		if(add+1!=n&&up[add+1]==up[add]-1)
			pq.push(mp(-a[add+1][up[add+1]],add+1));
		if(!pq.empty()) ret=min(ret,max(mx-mn,c[r].st-c[l].st));
	}
	//cout<<"rekt"<<endl;
	return ret;

}

int main() {

	srand(time(NULL));
	scanf("%d %d",&n,&m);
	for(int i=0;i<n;++i)
		for(int j=0;j<m;++j) {
			scanf("%d",&a[i][j]);
			c[i*m+j]=mp(a[i][j],mp(i,j));
		}
	sort(c,c+n*m);
	for(int i=0;i<n*m;++i) 
		kk[c[i].nd.st][c[i].nd.nd]=i;
	if(rand()%10!=2) ans=min(ans,solve());
	rotate1();
	//cout<<"malahmet"<<endl;
	if(rand()%10!=2) ans=min(ans,solve());
	rotate2();
	if(rand()%10!=2) ans=min(ans,solve());
	rotate1();
	if(rand()%10!=2) ans=min(ans,solve());
	printf("%d\n",ans);

}

Compilation message

joioi.cpp: In function 'int main()':
joioi.cpp:139:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d",&n,&m);
                      ^
joioi.cpp:142:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d",&a[i][j]);
                        ^
joioi.cpp: In function 'int solve()':
joioi.cpp:70:8: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized]
  int x,y;
        ^
joioi.cpp:86:15: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]
  for(int j=0;j<=x;++j) {
               ^

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 111948 KB Output is correct
2 Correct 6 ms 111948 KB Output is correct
3 Correct 6 ms 111948 KB Output is correct
4 Correct 9 ms 111948 KB Output is correct
5 Correct 13 ms 111948 KB Output is correct
6 Correct 13 ms 111948 KB Output is correct
7 Correct 9 ms 111948 KB Output is correct
8 Correct 9 ms 111948 KB Output is correct
9 Correct 9 ms 111948 KB Output is correct
10 Correct 9 ms 111948 KB Output is correct
11 Correct 9 ms 111948 KB Output is correct
12 Correct 9 ms 111948 KB Output is correct
13 Correct 9 ms 111948 KB Output is correct
14 Correct 9 ms 111948 KB Output is correct

Subtask #2
0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 111948 KB Output is correct
2 Correct 6 ms 111948 KB Output is correct
3 Correct 6 ms 111948 KB Output is correct
4 Correct 9 ms 111948 KB Output is correct
5 Correct 13 ms 111948 KB Output is correct
6 Correct 13 ms 111948 KB Output is correct
7 Correct 9 ms 111948 KB Output is correct
8 Correct 9 ms 111948 KB Output is correct
9 Correct 9 ms 111948 KB Output is correct
10 Correct 9 ms 111948 KB Output is correct
11 Correct 9 ms 111948 KB Output is correct
12 Correct 9 ms 111948 KB Output is correct
13 Correct 9 ms 111948 KB Output is correct
14 Correct 9 ms 111948 KB Output is correct
15 Correct 9 ms 111948 KB Output is correct
16 Correct 33 ms 111948 KB Output is correct
17 Correct 26 ms 111948 KB Output is correct
18 Incorrect 19 ms 111948 KB Output isn't correct
19 Halted 0 ms 0 KB -

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 111948 KB Output is correct
2 Correct 6 ms 111948 KB Output is correct
3 Correct 6 ms 111948 KB Output is correct
4 Correct 9 ms 111948 KB Output is correct
5 Correct 13 ms 111948 KB Output is correct
6 Correct 13 ms 111948 KB Output is correct
7 Correct 9 ms 111948 KB Output is correct
8 Correct 9 ms 111948 KB Output is correct
9 Correct 9 ms 111948 KB Output is correct
10 Correct 9 ms 111948 KB Output is correct
11 Correct 9 ms 111948 KB Output is correct
12 Correct 9 ms 111948 KB Output is correct
13 Correct 9 ms 111948 KB Output is correct
14 Correct 9 ms 111948 KB Output is correct
15 Correct 9 ms 111948 KB Output is correct
16 Correct 33 ms 111948 KB Output is correct
17 Correct 26 ms 111948 KB Output is correct
18 Incorrect 19 ms 111948 KB Output isn't correct
19 Halted 0 ms 0 KB -