Submission #968252

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
968252	2024-04-23 08:51:26	pcc	Line Town (CCO23_day1problem3)	C++17	0 / 25	1 ms	348 KiB

Main

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#include <bits/stdc++.h>
using namespace std;
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,popcnt,sse4")
#define ll long long
#define pii pair<int,int>
#define fs first
#define sc second
const int mxn = 5e5+10;
int N;
int arr[mxn];
int main(){
  ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
  cin>>N;
  for(int i = 1;i<=N;i++)cin>>arr[i];
  int cnt[2] = {};
  for(int i = 1;i<=N;i++){
    if(arr[i]<0)cnt[i&1]++;
  }
  if(cnt[1]-cnt[0] != 1&&cnt[1]-cnt[0] != 0){
    cout<<"-1\n";
    return 0;
  }
  int lp = N,rp = 0;
  for(int i = 1;i<=N;i++){
 
 
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• Subtask 1: 0 / 3
• Subtask 2: 0 / 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