Submission #1008098

#	Time	Username	Problem	Language	Result	Execution time	Memory
1008098		devariaota	Fancy Fence (CEOI20_fancyfence)	C++17	15 / 100	13 ms	1884 KiB

fancyfence

#include <bits/stdc++.h>
#define ll long long
#define pb push_back
#define pp pop_back
#define fi first
#define se second
#define lb lower_bound
#define ub upper_bound
#define pll pair<ll,ll> 
#define pii pair<int,int> 
#define vl vector<ll> 
#define nikah ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
const ll maxn = 1e5+7, modn1 = 1e9+7, modn2 = 998244353;
using namespace std;
 
// kalo kamu ngga emas nanti nadya merasa bersalah, ayo san demi nadya!!!
// Kalo emang soalnya susah, pindah soal dulu 
// Jangan sampe diem, pikirin sesuatu, pasti bisa!!!
// Cobain semua approach, jangan ngestuck di satu pemikiran
// Jangan overthinking, jangan panik, tenangin pikiranmu
 
 
ll t,n;
ll h[maxn], w[maxn];
 
ll f (ll x) {
  return ((x * (x+1)) / 2) % modn1;
}
 
void solve () {
  cin>>n;
  for (ll i=1; i<=n; i++) {
    cin>>h[i];
  }
  ll sum = 0;
  for (ll i=1; i<=n; i++) {
    cin>>w[i];
    sum = (sum + w[i]) % modn1;
  }
  /*for (ll i=1; i<=n; i++) {
    if (h[i] == 2) {
      cnt+=w[i];
    } else {
      ans += (cnt * (cnt + 1)) % modn1;
      cnt = 0;
    }
  }
  ans += (cnt * (cnt + 1)) % modn1;*/
  ll ans = (f(sum) * f(h[1])) % modn1; 
  cout<<ans<<endl;
}           
 
 
int main () {
  nikah
  t = 1;
//  cin>>t;
  while (t--) {
    solve();
  //  cout<<endl;
  }
}

• Subtask 1: 0 / 0
• Subtask 2: 0 / 12
• Subtask 3: 0 / 13
• Subtask 4: 15 / 15
• Subtask 5: 0 / 15
• Subtask 6: 0 / 18
• Subtask 7: 0 / 27