Submission #364712

#	Time	Username	Problem	Language	Result	Execution time	Memory
364712		Mamnoon_Siam	Fire (JOI20_ho_t5)	C++17	1 / 100	1092 ms	4884 KiB

ho_t5

#include <bits/stdc++.h>
using namespace std;

/* sorry, this is the bare minimum :'( */
using ll = long long;
using ii = pair<int, int>;
using vi = vector<int>;
#define all(v) begin(v), end(v)
#define sz(v) (int)(v).size()
#define fi first
#define se second

const int N = 2e5 + 5;

int n, q;
int a[N];
int prv[N];
int sub[N];

int intersect(int l1, int r1, int l2, int r2) {
  return max(0, min(r1, r2) - max(l1, l2) + 1);
}

int main(int argc, char const *argv[])
{
  cin.sync_with_stdio(0); cin.tie(0);
  cin.exceptions(cin.failbit);
#ifdef LOCAL
  freopen("in", "r", stdin);
#endif
  cin >> n >> q;
  for(int i = 1; i <= n; ++i) {
    cin >> a[i];
  }
  a[0] = INT_MAX;
  vector<int> stk = {0};
  for(int i = 1; i <= n; ++i) {
    while(a[stk.back()] <= a[i]) {
      stk.pop_back();
    }
    prv[i] = stk.back();
    stk.push_back(i);
  }
  fill(sub+1, sub+1+n, 1);
  for(int i = n; i >= 1; --i) {
    sub[prv[i]] += sub[i];
  }
  while(q--) {
    int T, l, r;
    cin >> T >> l >> r;
    ll ans = 0;
    for(int i = l; i <= r; ++i) ans += a[i];
    for(int i = 1; i <= n; ++i) if(prv[i]) {
      ll f = a[prv[i]] - a[i];
      int intersex;
      if(i+sub[i]-1 <= prv[i]+T) {
        intersex = intersect(i, i+sub[i]-1, l, r);
      } else {
        intersex = intersect(i, prv[i]+T, l, r);
      }
      ans += f * intersex;
    }
    cout << ans << endl;
  }
  return 0;
}

• Subtask 1: 1 / 1
• Subtask 2: 0 / 6
• Subtask 3: 0 / 7
• Subtask 4: 0 / 6
• Subtask 5: 0 / 80