Submission #595056

#	Time	Username	Problem	Language	Result	Execution time	Memory
595056		MadokaMagicaFan	Packing Biscuits (IOI20_biscuits)	C++14	9 / 100	1090 ms	340 KiB

biscuits

#include <bits/stdc++.h>

using namespace std;

using ll = long long;
using vi = vector<int>;
using pi = pair<int,int>;

#define all(v)          v.begin(),v.end()
#define sort(v)         sort(all(v))
#define endl            '\n'
#define forn(i,n)       for(int i = 0; i < n; ++i)
#define forbe(i,b,e)    for(int i = b; i < e; ++i)
#define forr(i,n)       for(int i = n-1; i >= 0; --i)
#define sz(v)           ((int)v.size())
#define pb              push_back
#define f               first
#define s               second

ll count_tastiness(ll x, vector<ll> a){
    int k = sz(a);
    ll ans = 0;

    forn(j,k-1) {
        if (a[j] < x)
            continue;
        ll delta = a[j]-x;
        a[j] -= delta;

        if (delta&1) ++a[j];
        a[j+1] += (delta)/2l;
    }

    if (x == -1) {
        vector<ll> dp(k+1, 0);

        int lz = -1;
        int l2 = -2;

        dp[0] = 1;
        ans = 1;
        forn(j, k) {
            if (a[j]) {
                ans += dp[j];
                dp[j+1] = ans;
                if (a[j] > 1) l2=j;
                continue;
            }
            
            if (l2 < lz) {
                dp[j+1] = ans;
                lz = j;
                continue;
            }

            ans += dp[l2];
            dp[j+1] = ans;
            lz = j;
        }

        return ans;
    }

    int mval = 100000;

    ll rem;

    int t;

    forbe(i,0, mval+4) {
        ++ans;

        rem = 0;
        t = 1;
        forn(j, 25) {
            rem = (rem/2l);
            if (j < k) rem += a[j];
//            cout << i << ' ' << j << ' ' << rem << endl;
            if ((i&(1<<j)) == 0) continue;
//            cout << i << endl;
            if (rem < x) {
                t = 0;
                --ans;
//                cout << i << endl;
                break;
            }
            rem -= x;
        }

//        if (t)
//            cout << i << endl;
    }

    return ans;
}

#ifdef ONPC
void solve() {
    int k, x;
    cin >> k >> x;

    vector<ll> a(k);

    forn(i,k)
        cin >> a[i];

    cout << count_tastiness(x,a) << endl;
}

int main() {
    freopen("in", "r", stdin);
//    ios_base::sync_with_stdio(0);cin.tie(0);
    solve();
}
#endif

Compilation message (stderr)

biscuits.cpp: In function 'll count_tastiness(ll, std::vector<long long int>)':
biscuits.cpp:68:9: warning: variable 't' set but not used [-Wunused-but-set-variable]
   68 |     int t;
      |         ^

• Subtask 1: 9 / 9
• Subtask 2: 0 / 12
• Subtask 3: 0 / 21
• Subtask 4: 0 / 35
• Subtask 5: 0 / 23