Submission #968247

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
968247	2024-04-23 08:46:53	Darren0724	Line Town (CCO23_day1problem3)	C++17	6 / 25	37 ms	14060 KiB

Main

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#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;
    for(int i=1;i<=n;i++){
        if(v[i]==1){
            if(st.size()&&(st.back()+i)%2==1){
                cnt+=(i-st.back());
                st.pop_back();
            } 
            else{
                st.push_back(i);
            }
        }
        if(st.size()==0){
            pre[i]=cnt;
 
 
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• Subtask 1: 3 / 3
• Subtask 2: 3 / 3
• Subtask 3: 0 / 3
• Subtask 4: 0 / 4
• Subtask 5: 0 / 4
• Subtask 6: 0 / 3
• Subtask 7: 0 / 2
• Subtask 8: 0 / 3