Submission #697141

#	Time	Username	Problem	Language	Result	Execution time	Memory
697141		sunwukong123	Packing Biscuits (IOI20_biscuits)	C++14	0 / 100	9 ms	1108 KiB

biscuits

#include "biscuits.h"
#include <bits/stdc++.h>
using namespace std;
#define int long long 
#define FOR(i,s,e) for(int i = s; i <= (int)e; ++i)
#define DEC(i,s,e) for(int i = s; i >= (int)e; --i)
#define IAMSPEED ios_base::sync_with_stdio(false); cin.tie(0);
#ifdef LOCAL
#define db(x) cerr << #x << "=" << x << "\n"
#define db2(x, y) cerr << #x << "=" << x << " , " << #y << "=" << y << "\n"
#define db3(a,b,c) cerr<<#a<<"="<<a<<","<<#b<<"="<<b<<","<<#c<<"="<<c<<"\n"
#define dbv(v) cerr << #v << ":"; for (auto ite : v) cerr << ite << ' '; cerr <<"\n"
#define dbvp(v) cerr << #v << ":"; for (auto ite : v) cerr << "{"  << ite.f << ',' << ite.s << "} "; cerr << "\n"
#define dba(a,ss,ee) cerr << #a << ":"; FOR(ite,ss,ee) cerr << a[ite] << ' '; cerr << "\n"
#define reach cerr << "LINE: " << __LINE__ << "\n";
#else
#define reach 
#define db(x)
#define db2(x,y)
#define db3(a,b,c)
#define dbv(v)
#define dbvp(v)
#define dba(a,ss,ee)
#endif
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
#define pb push_back
#define eb emplace_back
#define all(x) (x).begin(), (x).end()
#define f first 
#define s second
#define g0(x) get<0>(x)
#define g1(x) get<1>(x)
#define g2(x) get<2>(x)
#define g3(x) get<3>(x)
typedef pair <int, int> pi;
typedef tuple<int,int,int> ti3;
typedef tuple<int,int,int,int> ti4;
int rand(int a, int b) { return a + rng() % (b-a+1); }
const int MOD = 1e9 + 7;
const int inf = (int)1e9 + 500;
const long long oo = (long long)1e18 + 500;
template <typename T> bool chmax(T& a, const T b) { return a<b ? a = b, 1 : 0; }
template <typename T> bool chmin(T& a, const T b) { return a>b ? a = b, 1 : 0; }
const int MAXN = -1;

map<int,int> dp[130]; // dp[index done][number of free things carried over] = number of ways
int k;
int l;
int X;

vector<int> V;

int lst = 0;
vector<pi> ranges;
int out=1;
int lim = 123;
pi cur;
bool can(int debt, int idx) {
	if(idx < cur.f && debt<=0)return 1;
	DEC(i,idx,cur.f) {
		if(debt>2*oo)return 0;
		
		debt-=V[i];
		
		debt*=2;
		
		if(debt<=0)return 1;
	}
	if(debt<=0)return 1;
	return 0;
}
int get(pi range) {
	cur=range;
	// just find the biggest thing, and the thing will be continuous.
	// how? biggest thing is just lexographically biggest string from the front or something. yay
	int need = 0;
	int res = 0;
	DEC(i,cur.s,cur.f) { // try to activate it first. else don't
		db2(need,(need + X-V[i])*2 );
		 // you need to make it come from someone before

		if(can((need + X-V[i])*2, i-1)){ // i can turn this on!
			
			res += 1ll<<(i-cur.f);
			db2(i,res);
			need = (need + X-V[i]) * 2;
			db(need);
		} else { // i cannot turn this on. just ignore 
			int dif = V[i];
			db(dif);
			if(dif<0)need*=2;
			else need=(need-dif)*2;

			assert(need<=2*oo);
		}
		chmax(need, 0ll); // you can't carry backwards
	}
	
	return res+1;
}
long long count_tastiness(long long X, std::vector<long long> vec) {
	::X=X;
	out=1;
	l=vec.size();
	V=vector<int>(lim,0);
	ranges.clear();
	lst=0;
	FOR(i,0,l-1)V[i]=vec[i];
	int carry = 0;
	int ed=-1;
	FOR(i,0,123) {
		if(i>=l) {
			reach
			db2(carry,X);
			if(V[i] + carry >= X) {
				reach
				carry = V[i] + carry - X;
				carry/=2;
				ed=i;
			} else {
				break;
			}

			continue;
		}
		if(V[i] + carry >= X) {
			carry = V[i] + carry - X;
			carry/=2;
			ed=i;
		} else {
			ranges.pb({lst, i});
			lst=i+1;
			carry=0;
		}
	}
	ranges.pb({lst,123});

	for(auto i:ranges) {
		int res=get(i);
		db(res);
		out = out * res;
	}
	return out;
}

Compilation message (stderr)

biscuits.cpp: In function 'long long int count_tastiness(long long int, std::vector<long long int>)':
biscuits.cpp:110:6: warning: variable 'ed' set but not used [-Wunused-but-set-variable]
  110 |  int ed=-1;
      |      ^~

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