Submission #897545

#	Time	Username	Problem	Language	Result	Execution time	Memory
897545		bleahbleah	Security Guard (JOI23_guard)	C++17	0 / 100	13 ms	1660 KiB

guard

#include <bits/stdc++.h>
#define all(x) (x).begin(),(x).end()
using namespace std;

using ll = long long;
using ld = long double;

//#define int ll
#define sz(x) ((int)(x).size())

using pii = pair<int,int>;
using tii = tuple<int,int,int>;

vector<int> S;

signed main() {
  cin.tie(0) -> sync_with_stdio(0);
  int n, m, q;
  cin >> n >> m >> q;
  S.resize(n);
  
  for(auto &x : S) cin >> x;
  
  ll sum = 0, cnt = 0;
  for(int i = 0; i < n - 1; i++) {
    sum += max(S[i], S[i + 1]);
    if(S[i] != S[i + 1]) {
      cnt ^= 1;
      if(cnt == 1) sum--;
    }
  }
  
  cout << sum << '\n';
  
  
}

/**
      nu toate numerele mari sunt semne de ceva bine
      -- Si pe mine m-a surprins sa fiu sincer, dar pbn cautati pe net, sunt sigur ca se gasesc mai multe exemple
*/

• Subtask 1: 0 / 12
• Subtask 2: 0 / 13
• Subtask 3: 0 / 12
• Subtask 4: 0 / 13
• Subtask 5: 0 / 8
• Subtask 6: 0 / 18
• Subtask 7: 0 / 24