Submission #564379

#	Time	Username	Problem	Language	Result	Execution time	Memory
564379		thecodingwizard	Holiday (IOI14_holiday)	C++11	Compilation error	0 ms	0 KiB

holiday

#include <bits/stdc++.h>
#include "holiday.h"

using namespace std;
using ll = long long;

#define f first
#define s second
#define ii pair<int, int>
#define pb push_back
#define mp make_pair
#define all(x) x.begin(), x.end()

const int maxn = 100000;
int n, start, d;

int stIndex[maxn];
struct node {
    ll val;
    int initVal;
    int ct;
} st[maxn*4];

void buildST(int attraction[]) {
    vector<ii> attractions;
    for (int i = 0; i < n; i++) {
        attractions.pb(mp(attraction[i], i));
    }
    sort(all(attractions));
    reverse(all(attractions));
    int i = 0;
    for (auto x : attractions) {
        stIndex[x.s] = i;
        i++;
    }
    auto build = [&](int p, int i, int j, const auto &build)->void {
        if (i == j) {
            st[p] = node{0, attractions[i].f, 0};
        } else {
            build(p*2, i, (i+j)/2, build);
            build(p*2+1, (i+j)/2+1, j, build);
            st[p] = node{0,-1,0};
        }
    };
    build(1, 0, n-1, build);
}

void upd(int p, int i, int j, int k, bool isActive) {
    if (i > k || j < k) return;
    if (i == j && i == k) {
        st[p].val = isActive ? st[p].initVal : 0;
        st[p].ct = isActive;
    } else {
        upd(p*2, i, (i+j)/2, k, isActive);
        upd(p*2+1, (i+j)/2+1, j, k, isActive);
        st[p].val = st[p*2].val + st[p*2+1].val;
        st[p].ct = st[p*2].ct + st[p*2+1].ct;
    }
}

ll qry(int p, int i, int j, int k) {
    if (st[p].ct <= k) return st[p].val;
    if (i == j) return k == 0 ? 0 : st[p].val;
    if (st[p*2].ct >= k) return qry(p*2, i, (i+j)/2, k);
    return st[p*2].val + qry(p*2+1, (i+j)/2+1, j, k - st[p*2].ct);
}

vector<ll> oneWayLeft(3*maxn), oneWayRight(3*maxn);

void compute(int l, int r, int optl, int optr, vector<ll> &dp) {
    if (l > r) return;

    int mid = (l+r)/2;
    ll best = -1; int bestTransition = -1;
    for (int k = optl; k <= optr; k++) {
        upd(1, 0, n-1, stIndex[k], 1);
        int stepsRemaining = d - k - start;
        ll val = qry(1, 0, n-1, stepsRemaining);
        if (best < val) {
            best = val;
            bestTransition = k;
        }
    }

    dp[mid] = best;

    for (int k = bestTransition+1; k <= optr; k++) {
        upd(1, 0, n-1, stIndex[k], 0);
    }
    compute(mid+1, r, bestTransition, optr, dp);

    for (int k = optl; k <= bestTransition; k++) {
        upd(1, 0, n-1, stIndex[k], 0);
    }
    compute(l, mid-1, optl, bestTransition, dp);
}

long long int findMaxAttraction(int N, int Start, int D, int attraction[]) {
    assert(Start == 0);
    n = N, start = Start, d = D;

    buildST(attraction);
    compute(0, d, 0, n-1, oneWayRight);

    cout << oneWayRight[d] << endl;

    return 0;
}

Compilation message (stderr)

holiday.cpp: In function 'void buildST(int*)':
holiday.cpp:36:49: error: use of 'auto' in lambda parameter declaration only available with '-std=c++14' or '-std=gnu++14'
   36 |     auto build = [&](int p, int i, int j, const auto &build)->void {
      |                                                 ^~~~
holiday.cpp: In lambda function:
holiday.cpp:40:41: error: expression cannot be used as a function
   40 |             build(p*2, i, (i+j)/2, build);
      |                                         ^
holiday.cpp:41:45: error: expression cannot be used as a function
   41 |             build(p*2+1, (i+j)/2+1, j, build);
      |                                             ^
holiday.cpp: In function 'void buildST(int*)':
holiday.cpp:45:27: error: no match for call to '(buildST(int*)::<lambda(int, int, int, const int&)>) (int, int, int, buildST(int*)::<lambda(int, int, int, const int&)>&)'
   45 |     build(1, 0, n-1, build);
      |                           ^
holiday.cpp:36:18: note: candidate: 'buildST(int*)::<lambda(int, int, int, const int&)>'
   36 |     auto build = [&](int p, int i, int j, const auto &build)->void {
      |                  ^
holiday.cpp:36:18: note:   no known conversion for argument 4 from 'buildST(int*)::<lambda(int, int, int, const int&)>' to 'const int&'