Submission #304889

#	Time	Username	Problem	Language	Result	Execution time	Memory
304889		MarcoMeijer	Packing Biscuits (IOI20_biscuits)	C++14	42 / 100	1062 ms	10272 KiB

biscuits

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

// macros
typedef long long ll;
typedef long double ld;
typedef pair<int, int> ii;
typedef pair<ll, ll> lll;
typedef tuple<int, int, int> iii;
typedef vector<int> vi;
typedef vector<ii> vii;
typedef vector<iii> viii;
typedef vector<ll> vll;
typedef vector<lll> vlll;
#define REP(a,b,c) for(int a=int(b); a<int(c); a++)
#define RE(a,c) REP(a,0,c)
#define RE1(a,c) REP(a,1,c+1)
#define REI(a,b,c) REP(a,b,c+1)
#define REV(a,b,c) for(int a=int(c-1); a>=int(b); a--)
#define FOR(a,b) for(auto& a : b)
#define all(a) a.begin(), a.end()
#define INF 1e9
#define EPS 1e-9
#define pb push_back
#define popb pop_back
#define fi first
#define se second
#define sz size()

const int MX=60, MX2=21000;

ll x; vll a;
ll dp[MX][MX2];

ll getDP(ll i, ll j) {
    if(j < 0) j = 0;
    if(j >= MX2) return 0;
    return dp[i][j];
}

ll count_tastiness(ll X, vll A) {
    x=X; a=A;

    while(a.size() < MX) a.pb(0);
    RE(i,MX) {
        if(a[i] >= x+2) {
            ll rem = ((a[i]-x)/2ll)*2ll;
            a[i] -= rem;
            a[i+1] += rem/2ll;
        }
    }

    RE(i,MX) RE(j,MX2) {
        dp[i][j] = 0ll;
        if(i == 0) {
            ll remaining = a[i]-j;
            if(remaining >= 0)
                dp[i][j]++;
            if(remaining >= x)
                dp[i][j]++;
            continue;
        }
        dp[i][j] += getDP(i-1,(j-a[i])*2ll);
        dp[i][j] += getDP(i-1,(j+x-a[i])*2ll);
    }

	return dp[MX-1][0];
}

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