oj.uz

Submission #667036

# Submission time Handle Problem Language Result Execution time Memory
667036 2022-11-30T08:30:24 Z Darren0724 JJOOII 2 (JOI20_ho_t2) C++17
100 / 100
 10 ms 5976 KB 
#include<bits/stdc++.h>
using namespace std;
#define int long long
#define all(x) x.begin(),x.end()
int INF=1e18;
signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    int n,k;cin>>n>>k;
    string s;cin>>s;
    vector<int> pre(n);
    pre[0]=(s[0]=='O');
    for(int i=1;i<n;i++){
        pre[i]=pre[i-1]+(s[i]=='O');
    }
    auto f=[&](int a,int b)->int{
        if(a>b){
            return 0;
        }
        if(a==0){
            return pre[b];
        }
        return pre[b]-pre[a-1];
    };
    vector<int> dp1(n),dp2(n);
    int cnt=0;
    queue<int> q;
    for(int i=0;i<n;i++){
        if(s[i]=='J'){
            q.push(i);
        }
        if(q.size()>k){
            q.pop();
        }
        if(q.size()<k){
            dp1[i]=-INF;
        }
        else{
            dp1[i]=q.front();
        }
    }
    while(q.size()){
        q.pop();
    }
    for(int i=n-1;i>=0;i--){
        if(s[i]=='I'){
            q.push(i);
        }
        if(q.size()>k){
            q.pop();
        }
        if(q.size()<k){
            dp2[i]=INF;
        }
        else{
            dp2[i]=q.front();
        }
    }
    int j=n-1;
    int ans=INF;
    for(int i=n-2;i>=0;i--){
        while(f(i+1,j-2)>=k){
            j--;
        }
        if(f(i+1,j-1)>=k){
            ans=min(ans,dp2[j]-dp1[i]+1-k*3);
        }
    }
    if(ans>=n){
        cout<<-1<<endl;
    }
    else{
        cout<<ans<<endl;
    }

    return 0;
}

Compilation message

ho_t2.cpp: In function 'int main()':
ho_t2.cpp:32:20: warning: comparison of integer expressions of different signedness: 'std::queue<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   32 |         if(q.size()>k){
      |            ~~~~~~~~^~
ho_t2.cpp:35:20: warning: comparison of integer expressions of different signedness: 'std::queue<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   35 |         if(q.size()<k){
      |            ~~~~~~~~^~
ho_t2.cpp:49:20: warning: comparison of integer expressions of different signedness: 'std::queue<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   49 |         if(q.size()>k){
      |            ~~~~~~~~^~
ho_t2.cpp:52:20: warning: comparison of integer expressions of different signedness: 'std::queue<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   52 |         if(q.size()<k){
      |            ~~~~~~~~^~
ho_t2.cpp:26:9: warning: unused variable 'cnt' [-Wunused-variable]
   26 |     int cnt=0;
      |         ^~~

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 316 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 320 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 324 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 316 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 320 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 324 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 6 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 320 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 320 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 1 ms 340 KB Output is correct
31 Correct 1 ms 340 KB Output is correct
32 Correct 1 ms 340 KB Output is correct
33 Correct 1 ms 340 KB Output is correct
34 Correct 1 ms 340 KB Output is correct
35 Correct 1 ms 340 KB Output is correct

Subtask #3
87.0 / 87.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 316 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 320 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 324 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 6 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 320 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 320 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 1 ms 340 KB Output is correct
31 Correct 1 ms 340 KB Output is correct
32 Correct 1 ms 340 KB Output is correct
33 Correct 1 ms 340 KB Output is correct
34 Correct 1 ms 340 KB Output is correct
35 Correct 1 ms 340 KB Output is correct
36 Correct 8 ms 5088 KB Output is correct
37 Correct 9 ms 5464 KB Output is correct
38 Correct 8 ms 5472 KB Output is correct
39 Correct 9 ms 5460 KB Output is correct
40 Correct 9 ms 5616 KB Output is correct
41 Correct 8 ms 5480 KB Output is correct
42 Correct 10 ms 5552 KB Output is correct
43 Correct 6 ms 3512 KB Output is correct
44 Correct 7 ms 4348 KB Output is correct
45 Correct 8 ms 5572 KB Output is correct
46 Correct 8 ms 5600 KB Output is correct
47 Correct 9 ms 5600 KB Output is correct
48 Correct 8 ms 5572 KB Output is correct
49 Correct 6 ms 3856 KB Output is correct
50 Correct 10 ms 5600 KB Output is correct
51 Correct 9 ms 5596 KB Output is correct
52 Correct 8 ms 5600 KB Output is correct
53 Correct 7 ms 5888 KB Output is correct
54 Correct 7 ms 5572 KB Output is correct
55 Correct 6 ms 5808 KB Output is correct
56 Correct 6 ms 5976 KB Output is correct