Submission #374122

#	Time	Username	Problem	Language	Result	Execution time	Memory
374122		mariowong	Bigger segments (IZhO19_segments)	C++14	Compilation error	0 ms	0 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[def.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[def.front().ss])
      deq.pop_back();
    deq.push_back(pre[i]-pre[def.front().ss], i);
  }
  cout << dp[n] << '\n';
}

Compilation message (stderr)

segments.cpp: In function 'int main()':
segments.cpp:30:37: error: 'def' was not declared in this scope; did you mean 'deq'?
   30 |     while (deq.size() && pre[i]-pre[def.front().ss] >= deq.front().ff) {
      |                                     ^~~
      |                                     deq
segments.cpp:36:54: error: 'def' was not declared in this scope; did you mean 'deq'?
   36 |     while (deq.size() && deq.back().ff >= pre[i]-pre[def.front().ss])
      |                                                      ^~~
      |                                                      deq
segments.cpp:38:30: error: 'def' was not declared in this scope; did you mean 'deq'?
   38 |     deq.push_back(pre[i]-pre[def.front().ss], i);
      |                              ^~~
      |                              deq