Submission #286056

#	Time	Username	Problem	Language	Result	Execution time	Memory
286056		emanIaicepsa	Holiday (IOI14_holiday)	C++14	Compilation error	0 ms	0 KiB

holiday

#include"holiday.h"
#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define vi vector<int>
#define fi first
#define se second
#define pii pair<ll,ll>
#define all(n) (n).begin(),(n).end()
#define pb push_back
#define dbg(x) cerr<<#x<<" = "<<x<<'\n';

struct Persistent_tree{
	int l, r, tot, cnt;
}tr[4000005];

ll idx = 0, rt[100005];

void insert(ll copy, ll &now, ll val, ll L, ll R){
	now = ++idx;
	if(copy > 0) tr[now] = tr[copy];
	tr[now].cnt++;
	tr[now].tot += val;
	if(L == R) return;
	ll M = (L+R)/2;
	if(val <= M) insert(tr[copy].l, tr[now].l, val, L, M);
	else insert(tr[copy].r, tr[now].r, val, M+1, R);
}

ll query(int lid, int rid, int num){
	if(tr[rid].cnt - tr[lid].cnt <= num) return tr[rid].tot - tr[lid].tot;
	if(num <= 0) return 0;
	int Rr = tr[rid].r, Rl = tr[rid].l, Lr = tr[lid].r, Ll = tr[lid].l;
	if(!Rr && !Rl) return (tr[rid].tot - tr[lid].tot) / (tr[rid].cnt - tr[lid].cnt) * num;
	if(tr[Rr].cnt - tr[Lr].cnt <= num){
		num -= tr[Rr].cnt - tr[Lr].cnt;
		return tr[Rr].tot - tr[Lr].tot + query(Ll, Rl, num);
	}
	else return query(Lr, Rr, num);
}

ll arr[100005];
ll solve(int n, int s, int d){
	ll ans = 0;
	for(int i=1;i<=idx;i++) tr[i].l = tr[i].r = tr[i].tot = tr[i].cnt = 0;
	idx = 1;
	rt[0] = 1;
	
	for(int i=1;i<=n;i++) insert(rt[i-1], rt[i], arr[i], 0, 1000000);
	for(int i=1;i<=s;i++){
		if(d <= s-i) continue;
		ll tans = query(rt[i-1], rt[s], d - (s-i));
		
		for(int j=s+1;j<=n;j++){
			ll left = d - (s-i) - (j-i);
			if(left <= 0) break;
			ll que = query(rt[i-1], rt[j], left);
			tans = max(tans, que);
		}
		ans = max(ans, tans);
	}
	return ans;
}

ll findMaxAttraction(int n, int start, int d, int in[]) {
	start++;
	for(int i=1;i<=n;i++) arr[i] = in[i-1];
	ll al = solve(n, start, d);
	reverse(arr+1, arr+1+n);
	start = n + 1 - start;
	ll ar = solve(n, start, d);
	return max(al, ar);
}

Compilation message (stderr)

holiday.cpp: In function 'void insert(long long int, long long int&, long long int, long long int, long long int)':
holiday.cpp:26:42: error: cannot bind non-const lvalue reference of type 'long long int&' to an rvalue of type 'long long int'
   26 |  if(val <= M) insert(tr[copy].l, tr[now].l, val, L, M);
      |                                  ~~~~~~~~^
holiday.cpp:19:26: note:   initializing argument 2 of 'void insert(long long int, long long int&, long long int, long long int, long long int)'
   19 | void insert(ll copy, ll &now, ll val, ll L, ll R){
      |                          ^
holiday.cpp:27:34: error: cannot bind non-const lvalue reference of type 'long long int&' to an rvalue of type 'long long int'
   27 |  else insert(tr[copy].r, tr[now].r, val, M+1, R);
      |                          ~~~~~~~~^
holiday.cpp:19:26: note:   initializing argument 2 of 'void insert(long long int, long long int&, long long int, long long int, long long int)'
   19 | void insert(ll copy, ll &now, ll val, ll L, ll R){
      |                          ^