Submission #374124

#	Time	Username	Problem	Language	Result	Execution time	Memory
374124		mariowong	Bigger segments (IZhO19_segments)	C++14	0 / 100	1 ms	384 KiB

segments

#include <bits/stdc++.h>
#define int long long
#define push_back emplace_back
#define push_front emplace_front
#define pii pair<int,int>
#define ff first
#define ss second
using namespace std;
#define debug(args...) kout("[ " + string(#args) + " ]", args)
void kout() { cerr << endl; }
template <class T, class ...U> void kout(T a, U ...b) { cerr << a << ' ',kout(b...); }
template <class T> void pary(T L, T R) { while (L != R) cerr << *L << " \n"[++L==R]; }
 
const int MAXN = 500000;
int n;
int a[MAXN+1];
int pre[MAXN+1];
int dp[MAXN+1];
int len[MAXN+1];
deque <pii> deq;
 
signed main() {
  ios_base::sync_with_stdio(0), cin.tie(0);
  cin >> n;
  for (int i = 1; i <= n; i++)
    cin >> a[i], pre[i] = pre[i-1] + a[i];
  deq.push_back(0, 0);
  pii tmp;
  for (int i = 1; i <= n; i++) {
    while (deq.size() && pre[i]-pre[deq.front().ss] >= deq.front().ff) {
      dp[i] = dp[deq.front().ss] + 1;
      tmp = deq.front();
      deq.pop_front();
    }
    deq.push_front(tmp);
    while (deq.size() && deq.back().ff >= pre[i]-pre[deq.front().ss])
      deq.pop_back();
    deq.push_back(pre[i]-pre[deq.front().ss], i);
  }
  cout << dp[n] << '\n';
}

• Subtask 1: 0 / 13
• Subtask 2: 0 / 14
• Subtask 3: 0 / 10
• Subtask 4: 0 / 36
• Subtask 5: 0 / 27