oj.uz

Submission #968277

# Submission time Handle Problem Language Result Execution time Memory
968277 2024-04-23T09:19:22 Z Darren0724 Line Town (CCO23_day1problem3) C++17
6 / 25
 39 ms 12768 KB 
#include <bits/stdc++.h>
using namespace std;
#define all(x) x.begin(),x.end()
#define ll long long 
#define LCBorz ios_base::sync_with_stdio(false);cin.tie(0);
const int N=1000005;
const int mod=1e6+3;
const ll INF=1e18;
int32_t main(){
    LCBorz;
    int n;cin>>n;
    vector<ll> v(n+2),pre(n+2),suf(n+2);
    for(int i=1;i<=n;i++){
        cin>>v[i];
        assert(abs(v[i])<=1);
    }
    ll cnt=0;
    vector<int> st;
    int lz=0,zero=0,id=0;
    for(int i=1;i<=n;i++){
        if(v[i]==0){
            lz^=1;
            zero++;
        }
        else {
            id++;
            cnt+=zero;
            if((v[i]==1)^lz){
                if(st.size()&&(st.back()+id)%2==1){
                    cnt+=(id-st.back());
                    st.pop_back();
                } 
                else{
                    st.push_back(id);
                }
            }
        }
        if(st.size()==0){
            pre[i]=cnt;
        }
        else{
            pre[i]=INF;
        }
    }
    st.clear();
    cnt=0;
    lz=0;
    zero=0;
    id=0;
    for(int i=n;i>=1;i--){
        if(v[i]==0){
            lz^=1;
            zero++;
        }
        else {
            id++;
            cnt+=zero;
            if((v[i]==-1)^lz){
                if(st.size()&&(st.back()+id)%2==1){
                    cnt+=(id-st.back());
                    st.pop_back();
                } 
                else{
                    st.push_back(id);
                }
            }
        }
        if(st.size()==0){
            suf[i]=cnt;
        }
        else{
            suf[i]=INF;
        }
    }
    ll ans=INF;
    for(int i=0;i<=n;i++){
        ans=min(ans,pre[i]+suf[i+1]);
        //cout<<pre[i]<<' '<<suf[i+1]<<endl;
    }
    if(ans==INF){
        cout<<-1<<endl;
    }
    else{
        cout<<ans<<endl;
    }
    
    return 0;
}
/*
20
1 1 1 1 1 1 1 1 1 1 1 1 -1 1 1 -1 1 -1 -1 1
4
*/

Subtask #1
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct

Subtask #2
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 33 ms 12220 KB Output is correct
16 Correct 39 ms 12120 KB Output is correct
17 Correct 39 ms 12124 KB Output is correct
18 Correct 33 ms 12120 KB Output is correct
19 Correct 34 ms 12120 KB Output is correct
20 Correct 28 ms 12592 KB Output is correct
21 Correct 27 ms 12760 KB Output is correct
22 Correct 27 ms 12768 KB Output is correct
23 Correct 28 ms 12756 KB Output is correct
24 Correct 27 ms 12756 KB Output is correct

Subtask #3
0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Incorrect 0 ms 348 KB Output isn't correct
16 Halted 0 ms 0 KB -

Subtask #4
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 33 ms 12220 KB Output is correct
16 Correct 39 ms 12120 KB Output is correct
17 Correct 39 ms 12124 KB Output is correct
18 Correct 33 ms 12120 KB Output is correct
19 Correct 34 ms 12120 KB Output is correct
20 Correct 28 ms 12592 KB Output is correct
21 Correct 27 ms 12760 KB Output is correct
22 Correct 27 ms 12768 KB Output is correct
23 Correct 28 ms 12756 KB Output is correct
24 Correct 27 ms 12756 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Incorrect 0 ms 348 KB Output isn't correct
27 Halted 0 ms 0 KB -

Subtask #5
0 / 4.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 600 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -

Subtask #6
0 / 3.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 600 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -

Subtask #7
0 / 2.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Incorrect 0 ms 348 KB Output isn't correct
16 Halted 0 ms 0 KB -

Subtask #8
0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 33 ms 12220 KB Output is correct
16 Correct 39 ms 12120 KB Output is correct
17 Correct 39 ms 12124 KB Output is correct
18 Correct 33 ms 12120 KB Output is correct
19 Correct 34 ms 12120 KB Output is correct
20 Correct 28 ms 12592 KB Output is correct
21 Correct 27 ms 12760 KB Output is correct
22 Correct 27 ms 12768 KB Output is correct
23 Correct 28 ms 12756 KB Output is correct
24 Correct 27 ms 12756 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Incorrect 0 ms 348 KB Output isn't correct
27 Halted 0 ms 0 KB -