Submission #817952

#	Time	Username	Problem	Language	Result	Execution time	Memory
817952		AdamGS	Dungeon 3 (JOI21_ho_t5)	C++17	0 / 100	4040 ms	9700 KiB

Main

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define rep(a, b) for(int a = 0; a < (b); ++a)
#define st first
#define nd second
#define pb push_back
#define all(a) a.begin(),a.end()
const int LIM=2e5+7;
ll A[LIM], pos[LIM], B[LIM], mi[LIM], mil[LIM];
ll solve(int l, int r, ll u) {
  for(int i=l; i<r; ++i) if(A[i]>u) return -1;
  int pocz=l;
  ll ans=0;
  while(l<r) {
    ll prawo=min(pos[mi[l]], pos[r]);
    if(mil[l]<pocz || pos[l]-pos[mil[l]]>=u) {
      ans+=B[l]*min(prawo-pos[l], u);
    } else if(prawo-pos[mil[l]]>u) {
      ans+=B[l]*min(prawo-pos[mil[l]]-u, u);
    }
    ++l;
  }
  return ans;
}
int main() {
  ios_base::sync_with_stdio(0); cin.tie(0);
  int n, m;
  cin >> n >> m;
  rep(i, n) {
    cin >> A[i];
    pos[i+1]=pos[i]+A[i];
  }
  rep(i, n) cin >> B[i];
  A[n]=-1;
  stack<pair<ll,ll>>S;
  S.push({-1, n});
  for(int i=n-1; i>=0; --i) {
    while(S.top().st>B[i]) S.pop();
    mi[i]=S.top().nd;
    S.push({B[i], i});
  }
  while(!S.empty()) S.pop();
  S.push({-1, -1});
  rep(i, n) {
    while(S.top().st>=B[i]) S.pop();
    mil[i]=S.top().nd;
    S.push({B[i], i});
  }
  while(m--) {
    ll l, r, u;
    cin >> l >> r >> u; --l; --r;
    cout << solve(l, r, u) << '\n';
  }
}

• Subtask 1: 0 / 11
• Subtask 2: 0 / 14
• Subtask 3: 0 / 31
• Subtask 4: 0 / 44