Submission #284814

#TimeUsernameProblemLanguageResultExecution timeMemory
284814TMJNParrots (IOI11_parrots)C++17
81 / 100
10 ms1792 KiB
#include "encoder.h"
#include "encoderlib.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

static ll c[41][41];

ll comb(int n,int r){
	if(n<r)return 0;
	return c[n-r][r];
}

vector<int>F(ll t){
	vector<int>v(28,0);
	int s=32;
	for(int i=0;i<27;i++){
		ll k=0;
		for(int j=0;j<=s;j++){
			k+=comb(26-i+j,j);
		}
		if(t>k){
			t-=k;
			v[i]++;
			s--;
			i--;
		}
	}
	v[27]=t;
	return v;
}

void encode(int N, int M[]){
	for(int i=0;i<=40;i++){
		for(int j=0;j<=40;j++){
			c[i][j]=0;
		}
	}
	c[0][0]=1;
	for(int i=0;i<=40;i++){
		for(int j=0;j<=40;j++){
			if(i)c[i][j]+=c[i-1][j];
			if(j)c[i][j]+=c[i][j-1];
		}
	}
	for(int i=0;i*7<N;i++){
		ll t=0;
		for(int j=i*7;j<i*7+7;j++){
			t*=256;
			if(N<=j)continue;
			t+=M[j];
		}
		vector<int>v=F(t);
		for(int j=0;j<28;j++){
			for(int k=0;k<v[j];k++){
				send(i*28+j);
			}
		}
	}
}
#include "decoder.h"
#include "decoderlib.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

static int C[300],res[70];
static ll c[41][41];

ll dcomb(int n,int r){
	if(n<r)return 0;
	return c[n-r][r];
}

ll f(vector<int>v){
	ll t=0;
	int s=32;
	for(int i=0;i<27;i++){
		if(v[i]){
			v[i]--;
			for(int j=0;j<=s;j++){
				t+=dcomb(26-i+j,j);
			}
			s--;
			i--;
		}
	}
	t+=v[27];
	return t;
}

void decode(int N, int L, int X[]){
	for(int i=0;i<=40;i++){
		for(int j=0;j<=40;j++){
			c[i][j]=0;
		}
	}
	c[0][0]=1;
	for(int i=0;i<=40;i++){
		for(int j=0;j<=40;j++){
			if(i)c[i][j]+=c[i-1][j];
			if(j)c[i][j]+=c[i][j-1];
		}
	}
	for(int i=0;i<256;i++){
		C[i]=0;
	}
	for(int i=0;i<L;i++){
		C[X[i]]++;
	}
	for(int i=0;i<10;i++){
		vector<int>v(28,0);
		for(int j=0;j<28;j++){
			v[j]=C[i*28+j];
		}
		ll t=f(v);
		for(int j=6;j>=0;j--){
			res[i*7+j]=t%256;
			t/=256;
		}
	}
	for(int i=0;i<N;i++){
		output(res[i]);
	}
}
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