Submission #895848

#	Time	Username	Problem	Language	Result	Execution time	Memory
895848		vjudge1	Rice Hub (IOI11_ricehub)	C++17	Compilation error	0 ms	0 KiB

ricehub

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
#define f first
#define s second

ll n, budget;
vector<ll> psum;
vector<ll> ssum;

bool check(ll rice) {
    ll middle = (rice-1) / 2;
    ll right = middle+(rice)/2;
    ll minb = 1e9;
    for (ll i = 0; i <= n - rice; i++) {
        ll b = psum[i+right] - psum[i+middle] + ssum[i] - ssum[i+middle];
        minb = min(b, minb);
    }
    //cout << "minb: " << minb << endl;
    if (minb <= budget) return true;
    return false;
}


void besthub(ll r, ll maxcoor, ll a[], ll b) {
    n = r;
    budget = b;
    ll diff[n-1];
    for (ll i = 0; i < n-1; i++) {
        diff[i] = a[i+1] - a[i];
    }
    psum.resize(n, 0);
    ssum.resize(n, 0);

    for (ll i = 1; i < n; i++) {
        psum[i] = a[i-1] + psum[i-1];
    }
    for (ll i = n-2; i >= 0; i--) {
        ssum[i] = a[i] + ssum[i+1];
    }

    ll l = 1;
    while (l < r) {
        ll mid = (l + r + 1) / 2;
        //cout << "mid: " << mid << endl;
        if (check(mid)) {
            l = mid;
        }
        else {
            r = mid - 1;
        }
    }
    cout << l << endl;
}

signed main() {
    ll r, l, b; cin >> r >> l >> b;
    ll x[r];
    for (ll i = 0; i < r; i++) cin >> x[i];
    besthub(r, l, x, b);
}

Compilation message (stderr)

ricehub.cpp: In function 'void besthub(ll, ll, ll*, ll)':
ricehub.cpp:29:8: warning: variable 'diff' set but not used [-Wunused-but-set-variable]
   29 |     ll diff[n-1];
      |        ^~~~
/usr/bin/ld: /tmp/ccs2jsfc.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/cc8ZVVT9.o:ricehub.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/ccs2jsfc.o: in function `main':
grader.cpp:(.text.startup+0xae): undefined reference to `besthub(int, int, int*, long long)'
collect2: error: ld returned 1 exit status