oj.uz

Submission #222501

# Submission time Handle Problem Language Result Execution time Memory
222501 2020-04-13T08:26:30 Z astoria JJOOII 2 (JOI20_ho_t2) C++14
100 / 100
 27 ms 4172 KB 
#include <bits/stdc++.h>
using namespace std;

int main(){
	int n,k;
	cin>>n>>k;
	string s;
	cin>>s;
	s = 'K'+s;
	vector<int> jpos,ipos;
	int oct[n]; oct[0] = 0;
	int mpj[n], mpi[n];
	memset(mpj,-1,sizeof(mpj)); memset(mpi,-1,sizeof(mpi));
	for(int i=1; i<=n; i++){
		if(s[i]=='J'){ jpos.push_back(i); mpj[i] = jpos.size()-1;}
		if(s[i]=='I'){ ipos.push_back(i); mpi[i] = ipos.size()-1;}
		if(s[i]=='O') oct[i]=oct[i-1]+1;
		else oct[i]=oct[i-1];
	}
	
	int min_span = 1e9;
	int jsz=jpos.size(),isz=ipos.size();
	int j_r = jpos[jsz-1], j_l = jpos[jsz-k];
	int i_l=-1,i_r=-1;
	for(int i=j_r+1; i<=n; i++){
		if(oct[i-1]-oct[j_r]>=k && s[i]=='I'){
			i_l = i; break;
		}
	}
	if(i_l != -1){
		if(mpi[i_l] + k <= isz) i_r = ipos[mpi[i_l]+k-1];
	}
	if(i_r!=-1) min_span = min(min_span, i_r-j_l+1);
	//cout<<min_span<<endl;
	for(int i=jsz-k-1; i>=0; i--){
		j_l = jpos[i]; j_r = jpos[i+k-1];
		//cout<<j_l<<' '<<j_r<<endl;
		if(i_l==-1){
			if(oct[ipos[isz-1]-1] - oct[j_r] >= k) i_l=ipos[isz-1];
			else continue;
		}
		int ival=0;
		for(int v=i_l; v>0; v--){
			if(oct[v-1] - oct[j_r] < k){ ival=v; break;}
		}
		//binse
		
		int llll=1, rrrr=n;
		while(llll<rrrr){
			int mmmm = (llll+rrrr)/2;
			if(oct[mmmm]-oct[j_r] >= k) rrrr=mmmm;
			else llll=mmmm+1;
		}
		ival=llll-1;
		
		
		//binse(ival+1);
		
		int lll=0, rrr=isz-1;
		while(lll<rrr){
			int mmm = (lll+rrr)/2;
			if(ipos[mmm] > ival) rrr=mmm;
			else lll=mmm+1;
		}
		i_l = ipos[lll];
		
		if(i_l != -1){
			if(mpi[i_l] + k <= isz) i_r = ipos[mpi[i_l]+k-1];
		}
		//cout<<i_l<<' '<<i_r<<endl;
		//cout<<mpi[i_l]<<endl;
		if(i_r!=-1) min_span = min(min_span, i_r-j_l+1);
		//cout<<min_span<<endl;
	}
	//cout<<min_span<<endl;
	if(min_span==1e9) cout<<-1;
	else cout<<(min_span-(3*k));
}

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 256 KB Output is correct
2 Correct 4 ms 256 KB Output is correct
3 Correct 4 ms 256 KB Output is correct
4 Correct 5 ms 256 KB Output is correct
5 Correct 5 ms 256 KB Output is correct
6 Correct 5 ms 256 KB Output is correct
7 Correct 5 ms 256 KB Output is correct
8 Correct 5 ms 256 KB Output is correct
9 Correct 4 ms 256 KB Output is correct
10 Correct 5 ms 256 KB Output is correct
11 Correct 5 ms 256 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 4 ms 256 KB Output is correct
14 Correct 5 ms 256 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 256 KB Output is correct
2 Correct 4 ms 256 KB Output is correct
3 Correct 4 ms 256 KB Output is correct
4 Correct 5 ms 256 KB Output is correct
5 Correct 5 ms 256 KB Output is correct
6 Correct 5 ms 256 KB Output is correct
7 Correct 5 ms 256 KB Output is correct
8 Correct 5 ms 256 KB Output is correct
9 Correct 4 ms 256 KB Output is correct
10 Correct 5 ms 256 KB Output is correct
11 Correct 5 ms 256 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 4 ms 256 KB Output is correct
14 Correct 5 ms 256 KB Output is correct
15 Correct 5 ms 384 KB Output is correct
16 Correct 5 ms 384 KB Output is correct
17 Correct 5 ms 384 KB Output is correct
18 Correct 5 ms 384 KB Output is correct
19 Correct 5 ms 384 KB Output is correct
20 Correct 5 ms 384 KB Output is correct
21 Correct 5 ms 384 KB Output is correct
22 Correct 5 ms 384 KB Output is correct
23 Correct 5 ms 384 KB Output is correct
24 Correct 5 ms 384 KB Output is correct
25 Correct 5 ms 384 KB Output is correct
26 Correct 5 ms 512 KB Output is correct
27 Correct 5 ms 384 KB Output is correct
28 Correct 5 ms 384 KB Output is correct
29 Correct 5 ms 384 KB Output is correct
30 Correct 5 ms 384 KB Output is correct
31 Correct 5 ms 384 KB Output is correct
32 Correct 5 ms 384 KB Output is correct
33 Correct 5 ms 384 KB Output is correct
34 Correct 5 ms 384 KB Output is correct
35 Correct 5 ms 384 KB Output is correct

Subtask #3
87.0 / 87.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 256 KB Output is correct
2 Correct 4 ms 256 KB Output is correct
3 Correct 4 ms 256 KB Output is correct
4 Correct 5 ms 256 KB Output is correct
5 Correct 5 ms 256 KB Output is correct
6 Correct 5 ms 256 KB Output is correct
7 Correct 5 ms 256 KB Output is correct
8 Correct 5 ms 256 KB Output is correct
9 Correct 4 ms 256 KB Output is correct
10 Correct 5 ms 256 KB Output is correct
11 Correct 5 ms 256 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 4 ms 256 KB Output is correct
14 Correct 5 ms 256 KB Output is correct
15 Correct 5 ms 384 KB Output is correct
16 Correct 5 ms 384 KB Output is correct
17 Correct 5 ms 384 KB Output is correct
18 Correct 5 ms 384 KB Output is correct
19 Correct 5 ms 384 KB Output is correct
20 Correct 5 ms 384 KB Output is correct
21 Correct 5 ms 384 KB Output is correct
22 Correct 5 ms 384 KB Output is correct
23 Correct 5 ms 384 KB Output is correct
24 Correct 5 ms 384 KB Output is correct
25 Correct 5 ms 384 KB Output is correct
26 Correct 5 ms 512 KB Output is correct
27 Correct 5 ms 384 KB Output is correct
28 Correct 5 ms 384 KB Output is correct
29 Correct 5 ms 384 KB Output is correct
30 Correct 5 ms 384 KB Output is correct
31 Correct 5 ms 384 KB Output is correct
32 Correct 5 ms 384 KB Output is correct
33 Correct 5 ms 384 KB Output is correct
34 Correct 5 ms 384 KB Output is correct
35 Correct 5 ms 384 KB Output is correct
36 Correct 27 ms 3672 KB Output is correct
37 Correct 27 ms 3928 KB Output is correct
38 Correct 27 ms 3916 KB Output is correct
39 Correct 25 ms 3916 KB Output is correct
40 Correct 22 ms 4044 KB Output is correct
41 Correct 25 ms 4044 KB Output is correct
42 Correct 27 ms 4044 KB Output is correct
43 Correct 15 ms 2708 KB Output is correct
44 Correct 17 ms 2936 KB Output is correct
45 Correct 23 ms 4044 KB Output is correct
46 Correct 22 ms 3936 KB Output is correct
47 Correct 22 ms 4172 KB Output is correct
48 Correct 21 ms 3916 KB Output is correct
49 Correct 15 ms 2828 KB Output is correct
50 Correct 22 ms 3916 KB Output is correct
51 Correct 22 ms 3936 KB Output is correct
52 Correct 18 ms 3668 KB Output is correct
53 Correct 18 ms 4040 KB Output is correct
54 Correct 21 ms 4040 KB Output is correct
55 Correct 19 ms 4040 KB Output is correct
56 Correct 17 ms 4040 KB Output is correct