oj.uz

Submission #212142

# Submission time Handle Problem Language Result Execution time Memory
212142 2020-03-22T10:46:37 Z kshitij_sodani JJOOII 2 (JOI20_ho_t2) C++17
100 / 100
 38 ms 9984 KB 
#include <iostream>
#include <bits/stdc++.h>
using namespace std;
typedef  long long llo;
#define mp make_pair
#define pb push_back
#define a first
#define b second
int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	int n,k;
	cin>>n>>k;
	char ss;
	int it[n];
	for(int i=0;i<n;i++){
		cin>>ss;
		if(ss=='O'){
			it[i]=1;
		}
		else if(ss=='I'){
			it[i]=2;
		}
		else{
			it[i]=0;
		}
	}
	int pre[n];
	pre[0]=0;
	if(it[0]==1){
		pre[0]=1;
	}
	for(int i=1;i<n;i++){
		pre[i]=pre[i-1];
		pre[i]+=it[i]%2;
	}
	multiset<int> aa;
	multiset<int,greater<int>> bb;
	int dp[n];
	int dp2[n];
	for(int i=0;i<n;i++){
		dp[i]=n+1;
		dp2[i]=n+1;
	}

	for(int i=0;i<n;i++){
		if(it[i]==0){
			aa.insert(i);
			if(aa.size()>k){
				auto ac=aa.begin();
				aa.erase(ac);
			}
			if(aa.size()==k){
				dp[i]=(i-(*aa.begin())+1-k);
			}
		}
		if(i>0){
			dp[i]=min(dp[i],dp[i-1]+1);
		}
	}

	for(int i=n-1;i>=0;i--){
		if(it[i]==2){
			bb.insert(i);
			if(bb.size()>k){
				auto ac=bb.begin();
				bb.erase(ac);
			}
			if(bb.size()==k){
				dp2[i]=((*bb.begin())-i+1-k);
			}
		}
		if(i<n-1){
			dp2[i]=min(dp2[i],dp2[i+1]+1);
		}
	}
	int mi=n+1;
	int ind=0;	
	int ans=n+1;
	/*for(int i=0;i<n;i++){
		cout<<dp[i]<<" ";
	}
	cout<<endl;*/
/*	muliset<int> ak;
	multiset<int> bk;
*/
	for(int i=2;i<n;i++){
		mi+=1;
		while(ind<i-1){
			if(pre[i-1]-pre[ind]>=k){
				mi=min(mi,dp[ind]+(i-1-ind-k));
				ind+=1;
			}
			else{
				break;
			}

		}
		
		ans=min(ans,mi+dp2[i]);
	}	
	if(ans<=n){
		cout<<ans<<endl;
	}
	else{
		cout<<-1<<endl;
	}




	



























	return 0;
}

Compilation message

ho_t2.cpp: In function 'int main()':
ho_t2.cpp:49:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    if(aa.size()>k){
       ~~~~~~~~~^~
ho_t2.cpp:53:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    if(aa.size()==k){
       ~~~~~~~~~^~~
ho_t2.cpp:65:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    if(bb.size()>k){
       ~~~~~~~~~^~
ho_t2.cpp:69:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    if(bb.size()==k){
       ~~~~~~~~~^~~

Subtask #1
1.0 / 1.0

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

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 4 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 4 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 4 ms 384 KB Output is correct
14 Correct 5 ms 384 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 384 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 10 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 512 KB Output is correct

Subtask #3
87.0 / 87.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 4 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 4 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 4 ms 384 KB Output is correct
14 Correct 5 ms 384 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 384 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 10 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 512 KB Output is correct
36 Correct 20 ms 3456 KB Output is correct
37 Correct 22 ms 3712 KB Output is correct
38 Correct 23 ms 3712 KB Output is correct
39 Correct 31 ms 4088 KB Output is correct
40 Correct 36 ms 5376 KB Output is correct
41 Correct 34 ms 4480 KB Output is correct
42 Correct 30 ms 3840 KB Output is correct
43 Correct 23 ms 3712 KB Output is correct
44 Correct 29 ms 4480 KB Output is correct
45 Correct 36 ms 5760 KB Output is correct
46 Correct 37 ms 5760 KB Output is correct
47 Correct 37 ms 5788 KB Output is correct
48 Correct 37 ms 5788 KB Output is correct
49 Correct 26 ms 3968 KB Output is correct
50 Correct 36 ms 5752 KB Output is correct
51 Correct 37 ms 5760 KB Output is correct
52 Correct 36 ms 8696 KB Output is correct
53 Correct 37 ms 8824 KB Output is correct
54 Correct 17 ms 3712 KB Output is correct
55 Correct 38 ms 7808 KB Output is correct
56 Correct 36 ms 9984 KB Output is correct