Submission #356843

#	Time	Username	Problem	Language	Result	Execution time	Memory
356843		Kerim	Packing Biscuits (IOI20_biscuits)	C++17	100 / 100	867 ms	1388 KiB

biscuits

#include "biscuits.h"
#include "bits/stdc++.h"
#define MAXN 100009
#define INF 1000000007
#define mp(x,y) make_pair(x,y)
#define all(v) v.begin(),v.end()
#define pb(x) push_back(x)
#define wr cout<<"----------------"<<endl;
#define ppb() pop_back()
#define tr(ii,c) for(__typeof((c).begin()) ii=(c).begin();ii!=(c).end();ii++)
#define ff first
#define ss second
#define my_little_dodge 46
#define debug(x)  cerr<< #x <<" = "<< x<<endl;
using namespace std;
 
typedef long long ll;
typedef pair<int,int> PII;
template<class T>bool umin(T& a,T b){if(a>b){a=b;return 1;}return 0;}
template<class T>bool umax(T& a,T b){if(a<b){a=b;return 1;}return 0;}
ll X;
map<ll,ll>dp[61];
vector<ll>a;
ll rec(int pos,ll cur){
	if(pos==61)return 1;
  	__typeof((dp[pos]).begin())it=dp[pos].lower_bound(cur),itt;
	if(it!=dp[pos].end()){
		if(it->ff==cur)return it->ss;itt=it;
		if(itt!=dp[pos].begin()){
			itt--;if(itt->ss==it->ss)return it->ss;	
		}
	}	
	ll &ret=dp[pos][cur];
	ret=rec(pos+1,(cur+a[pos])/2);
	if(a[pos]+cur>=X)ret+=rec(pos+1,(a[pos]+cur-X)/2);
	it=dp[pos].upper_bound(cur);
	if(it!=dp[pos].end() and it->ss==ret){
		itt=it;itt++;
		if(itt!=dp[pos].end() and itt->ss==ret)
			dp[pos].erase(it);
	}it--;
	if(it!=dp[pos].begin()){it--;
		if(it->ss==ret){
			itt=it;
			if(itt!=dp[pos].begin()){itt--;
				if(itt->ss==ret)
					dp[pos].erase(it);
			}
		}
	}
	return ret;
}
long long count_tastiness(long long x, vector<long long> A) {
	X=x;a=A;
	for(int i=0;i<61;i++)dp[i].clear();
	while(int(a.size())<61)a.pb(0);
	for(int i=0;i<60;i++)
		if(a[i]>x){
			ll tmp=(a[i]-x)/2;
			a[i+1]+=tmp;a[i]-=tmp<<1;	
		}
	return rec(0,0);
}

Compilation message (stderr)

biscuits.cpp: In function 'll rec(int, ll)':
biscuits.cpp:28:3: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   28 |   if(it->ff==cur)return it->ss;itt=it;
      |   ^~
biscuits.cpp:28:32: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   28 |   if(it->ff==cur)return it->ss;itt=it;
      |                                ^~~

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