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Submission #303648

# Submission time Handle Problem Language Result Execution time Memory
303648 2020-09-20T13:55:45 Z AmineWeslati Packing Biscuits (IOI20_biscuits) C++14
9 / 100
 833 ms 384 KB 
//Never stop trying
#include "biscuits.h"
#include <bits/stdc++.h>
using namespace std;
#define boost ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0)

typedef string str;
typedef long long ll;
typedef double db;
typedef long double ld;
typedef pair<int, int> pi;
#define fi first
#define se second
typedef vector<int> vi;
typedef vector<pi> vpi;
typedef vector<str> vs;
typedef vector<ld> vd;
#define pb push_back
#define sz(x) (int)x.size()
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
#define endl "\n"

#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define F0R(i,a) FOR(i,0,a)
#define ROF(i,a,b) for (int i = (b)-1; i >= (a); --i)
#define R0F(i,a) ROF(i,0,a)

const int MOD = 1e9 + 7; //998244353
const ll INF = 1e18;
const int MX = 2e5 + 10;
const int nx[4] = {0, 0, 1, -1}, ny[4] = {1, -1, 0, 0}; //right left down up

template<class T> using V = vector<T>;
template<class T> bool ckmin(T& a, const T& b) { return a > b ? a = b, 1 : 0; }
template<class T> bool ckmax(T& a, const T& b) { return a < b ? a = b, 1 : 0; }

ll cdiv(ll a, ll b) { return a / b + ((a ^ b) > 0 && a % b); } // divide a by b rounded up
constexpr int log2(int x) { return 31 - __builtin_clz(x); } // floor(log2(x))

#define dbg(x) cerr << " - " << #x << " : " << x << endl;
#define dbgs(x,y) cerr << " - " << #x << " : " << x << " / " << #y << " : " << y << endl;
#define dbgv(v) cerr << " - " << #v << " : " << endl << "[ "; for(auto it : v) cerr << it << ' '; cerr << ']' << endl;

void IO() {
#ifndef ONLINE_JUDGE
	freopen("input.txt", "r", stdin);
	freopen("output.txt", "w", stdout);
#endif
}

ll K,x; 
ll a[65];

ll S=0;

unordered_map<ll,ll> memo[61];

ll solve(ll i, ll r){
	if(i==60) return 1;
	if(memo[i].count(r)) return memo[i][r];
	ll ans=solve(i+1,(r+a[i])/2);
	if(r+a[i]>0) ans+=solve(i+1,(r+a[i]-1)/2);
	return memo[i][r]=ans;
}

ll count_tastiness(ll xx, V<ll>aa){
	K=sz(aa); FOR(i,0,K) a[i]=aa[i]; 
	FOR(i,0,K) S+=(int)(pow(2,i)+0.5)*a[i];
	x=xx;  
	
	aa.resize(60); FOR(i,K,60) a[i]=0; 
	if(S<=1e6){
		int ans=0;
		for(ll y=0; y<=S; y++){
			FOR(i,0,60) aa[i]=a[i];
			bool p=true;
			bitset <60> bs(y);
			FOR(i,0,60){
				if(bs[i]){
					if(aa[i]>=x) aa[i]-=x;
					else{p=false;}
				}
				if(!p) break;
				if(i<59) aa[i+1]+=aa[i]/2;
			}
			if(p) ans++;
		}
		return ans;
	}
	else if(x==1){
		return solve(0,0);
	}

}




/* Careful!!!
	.Array bounds
	.Infinite loops
	.Uninitialized variables / empty containers
	.Order of input

   Some insights:
	.Binary search
	.Graph representation
	.Write brute force code
	.Change your approach
*/

Compilation message

biscuits.cpp: In function 'void IO()':
biscuits.cpp:47:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   47 |  freopen("input.txt", "r", stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
biscuits.cpp:48:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   48 |  freopen("output.txt", "w", stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
biscuits.cpp: In function 'll count_tastiness(ll, V<long long int>)':
biscuits.cpp:95:1: warning: control reaches end of non-void function [-Wreturn-type]
   95 | }
      | ^

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 81 ms 256 KB Output is correct
2 Correct 241 ms 364 KB Output is correct
3 Correct 136 ms 256 KB Output is correct
4 Correct 296 ms 376 KB Output is correct
5 Correct 55 ms 256 KB Output is correct
6 Correct 826 ms 256 KB Output is correct
7 Correct 38 ms 256 KB Output is correct
8 Correct 833 ms 360 KB Output is correct
9 Correct 76 ms 256 KB Output is correct
10 Correct 330 ms 256 KB Output is correct
11 Correct 53 ms 256 KB Output is correct
12 Correct 650 ms 364 KB Output is correct
13 Correct 625 ms 368 KB Output is correct
14 Correct 493 ms 372 KB Output is correct

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 82 ms 256 KB Output is correct
2 Incorrect 1 ms 256 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 256 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 35.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 384 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 81 ms 256 KB Output is correct
2 Correct 241 ms 364 KB Output is correct
3 Correct 136 ms 256 KB Output is correct
4 Correct 296 ms 376 KB Output is correct
5 Correct 55 ms 256 KB Output is correct
6 Correct 826 ms 256 KB Output is correct
7 Correct 38 ms 256 KB Output is correct
8 Correct 833 ms 360 KB Output is correct
9 Correct 76 ms 256 KB Output is correct
10 Correct 330 ms 256 KB Output is correct
11 Correct 53 ms 256 KB Output is correct
12 Correct 650 ms 364 KB Output is correct
13 Correct 625 ms 368 KB Output is correct
14 Correct 493 ms 372 KB Output is correct
15 Correct 82 ms 256 KB Output is correct
16 Incorrect 1 ms 256 KB Output isn't correct
17 Halted 0 ms 0 KB -