Submission #923120

#	Time	Username	Problem	Language	Result	Execution time	Memory
923120		Lobo	Parrots (IOI11_parrots)	C++17	100 / 100	1264 ms	24316 KiB

encoder

#include "encoder.h"
#include "encoderlib.h"
#include <bits/stdc++.h>
using namespace std;
#define mp make_pair
#define pb push_back
#define fr first
#define sc second
#define int long long
// const int maxn = 1e5+10;
// const int inf = 1e18+10;
static int R;
static int k;
static int base = 1e8;

bool geq(vector<int> s, vector<int> t) {
	if(s.size() > t.size()) return 1;
	if(t.size() > s.size()) return 0;

	for(int i = (int) s.size() -1; i >= 0; i--) {
		if(s[i] > t[i]) return 1;
		if(t[i] > s[i]) return 0;
	}
	return 1;
}

vector<int> mult(vector<int> s, vector<int> t) {
	vector<int> ans((int) s.size()+(int) t.size(),0);
	if(s == vector<int>{0} or t == vector<int>{0}) return vector<int>{0};

	for(int i = 0; i < s.size(); i++) {
		for(int j = 0; j < t.size(); j++) {
			ans[i+j]+= s[i]*t[j];
		}
	}

	for(int i = 0; i < ans.size(); i++) {
		if(ans[i] >= base) {
			if(i+1 == (int) ans.size()) ans.pb(0);
			ans[i+1]+= ans[i]/base;
			ans[i]%= base;
		}
	}
	while(ans.size() > 1 && ans.back() == 0) ans.pop_back();
	return ans;
}

vector<int> add(vector<int> s, vector<int> t) {
	vector<int> ans = s;

	for(int i = 0; i < t.size(); i++) {
		if(i == (int) ans.size()) ans.pb(0);
		ans[i]+= t[i];
	}

	for(int i = 0; i < ans.size(); i++) {
		if(ans[i] >= base) {
			if(i+1 == (int) ans.size()) ans.pb(0);
			ans[i+1]+= ans[i]/base;
			ans[i]%= base;
		}
	}
	while(ans.size() > 1 && ans.back() == 0) ans.pop_back();
	return ans;
}

vector<int> addref(vector<int> &s, vector<int> &t) {
	vector<int> ans = s;

	for(int i = 0; i < t.size(); i++) {
		if(i == (int) ans.size()) ans.pb(0);
		ans[i]+= t[i];
	}

	for(int i = 0; i < ans.size(); i++) {
		if(ans[i] >= base) {
			if(i+1 == (int) ans.size()) ans.pb(0);
			ans[i+1]+= ans[i]/base;
			ans[i]%= base;
		}
	}
	while(ans.size() > 1 && ans.back() == 0) ans.pop_back();
	return ans;
}

vector<int> trans(int x) {
	if(x == 0) return vector<int>{0};
	vector<int> ans;
	while(x != 0) {
		ans.pb(x%base);
		x/= base;
	}
	return ans;
}

int transback(vector<int> s) {
	int ans = 0;
	int p10 = 1;
	for(int i = 0; i < s.size(); i++) {
		ans+= p10*s[i];
		p10*= base;
	}
	return ans;
}

vector<int> dp[260][10*64+10];

void precomp() {
	// dp(i,sum) = # de (q_0,q_1,...,q_i) tal que a soma é no maximo sum
	for(int i = 0; i < R; i++) {
		for(int j = 0; j <= k; j++) {
			dp[i][j] = vector<int>{0};
		}
	}

	for(int j = 0; j <= k; j++) {
		dp[0][j] = trans(j+1);
	}

	for(int i = 1; i < R; i++) {
		dp[i][0] = trans(1);
		for(int j = 1; j <= k; j++) {
			dp[i][j] = addref(dp[i][j-1],dp[i-1][j]);
		}
	}
}

vector<int> querysmaller(vector<int> q) {
	vector<int> ans = {0};

	int sumq = 0;
	for(int i = R-1; i >= 0; i--) {
		for(int j = 0; j <= q[i]-1 && k-j-sumq >= 0; j++) {
			if(i == 0) ans = add(ans,trans((int)1));
			else ans = add(ans,dp[i-1][k-j-sumq]);
		}
		sumq+= q[i];
	}

	if(sumq <= k) ans = add(ans,trans(1));
	return ans;
}

vector<int> findg(vector<int> g) {
	vector<int> ans(R,0);

	int sumans = 0;
	vector<int> cur = {1};
	for(int i = R-1; i >= 0; i--) {
		ans[i] = 0;
		for(int j = 1; j <= k-sumans; j++) {
			vector<int> newcur;
			if(i == 0) newcur = add(cur,trans(1));
			else newcur = add(cur,dp[i-1][k-sumans-j+1]);
			if(!geq(g,newcur)) break;
			cur = newcur;
			ans[i] = j;
		}
		sumans+= ans[i];
	}
	return ans;
}

void encode(int32_t n, int32_t m[])
{
	k = 5*n;
	R = 220;
  	// clock_t tStart = clock();
	precomp();
  	// printf("Time taken to precomp: %.2fs\n", (double)(clock() - tStart)/CLOCKS_PER_SEC);

	vector<int> vm = trans(0);
	vector<int> p256 = trans(1);
	for(int i = 0; i < n; i++) {
		vm = add(vm,mult(p256,trans(m[i])));
		p256 = mult(p256,trans(256));
	}

	vector<int> ans = findg(add(vm,trans(1)));

	for(int i = 0; i < ans.size(); i++) {
		for(int j = 0; j < ans[i]; j++) {
			send((int32_t) i);
		}
	}	
}

decoder

#include "decoder.h"
#include "decoderlib.h"
#include <bits/stdc++.h>
using namespace std;
#define mp make_pair
#define pb push_back
#define fr first
#define sc second
#define int long long
// const int maxn = 1e5+10;
// const int inf = 1e18+10;
static int R1;
static int k1;
static int base1 = 1e8;
bool geq1(vector<int> s, vector<int> t) {
	if(s.size() > t.size()) return 1;
	if(t.size() > s.size()) return 0;

	for(int i = (int) s.size() -1; i >= 0; i--) {
		if(s[i] > t[i]) return 1;
		if(t[i] > s[i]) return 0;
	}
	return 1;
}

vector<int> mult1(vector<int> s, vector<int> t) {
	vector<int> ans((int) s.size()+(int) t.size(),0);
	if(s == vector<int>{0} or t == vector<int>{0}) return vector<int>{0};

	for(int i = 0; i < s.size(); i++) {
		for(int j = 0; j < t.size(); j++) {
			ans[i+j]+= s[i]*t[j];
		}
	}

	for(int i = 0; i < ans.size(); i++) {
		if(ans[i] >= base1) {
			if(i+1 == (int) ans.size()) ans.pb(0);
			ans[i+1]+= ans[i]/base1;
			ans[i]%= base1;
		}
	}
	while(ans.size() > 1 && ans.back() == 0) ans.pop_back();
	return ans;
}

vector<int> neg(vector<int> s) {
	for(int i = 0; i < s.size(); i++) {
		s[i]*= -1;
	}
	return s;
}

vector<int> add1(vector<int> s, vector<int> t) {
	vector<int> ans = s;

	for(int i = 0; i < t.size(); i++) {
		if(i == (int) ans.size()) ans.pb(0);
		ans[i]+= t[i];
	}

	for(int i = 0; i < ans.size(); i++) {

		if(ans[i] < 0) {
			if(i+1 == (int) ans.size()) ans.pb(0);
			int qt = (ans[i]-1)/base1 + 1;
			ans[i]+= qt*base1;
			ans[i+1]-= qt;
		}
		if(ans[i] >= base1) {
			if(i+1 == (int) ans.size()) ans.pb(0);
			ans[i+1]+= ans[i]/base1;
			ans[i]%= base1;
		}
	}
	while(ans.size() > 1 && ans.back() == 0) ans.pop_back();

	return ans;
}
vector<int> add1ref(vector<int> &s, vector<int> &t) {
	vector<int> ans = s;

	for(int i = 0; i < t.size(); i++) {
		if(i == (int) ans.size()) ans.pb(0);
		ans[i]+= t[i];
	}

	for(int i = 0; i < ans.size(); i++) {

		if(ans[i] < 0) {
			if(i+1 == (int) ans.size()) ans.pb(0);
			int qt = (ans[i]-1)/base1 + 1;
			ans[i]+= qt*base1;
			ans[i+1]-= qt;
		}
		if(ans[i] >= base1) {
			if(i+1 == (int) ans.size()) ans.pb(0);
			ans[i+1]+= ans[i]/base1;
			ans[i]%= base1;
		}
	}
	while(ans.size() > 1 && ans.back() == 0) ans.pop_back();

	return ans;
}

vector<int> trans1(int x) {
	if(x == 0) return vector<int>{0};
	vector<int> ans;
	while(x != 0) {
		ans.pb(x%base1);
		x/= base1;
	}
	return ans;
}

int trans1back1(vector<int> s) {
	int ans = 0;
	int p10 = 1;
	for(int i = 0; i < s.size(); i++) {
		ans+= p10*s[i];
		p10*= base1;
	}
	return ans;
}

vector<int> dp1[260][10*64+10];

void precomp1() {
	// dp(i,sum) = # de (q_0,q_1,...,q_i) tal que a soma é no maximo sum
	for(int i = 0; i < R1; i++) {
		for(int j = 0; j <= k1; j++) {
			dp1[i][j] = vector<int>{0};
		}
	}

	for(int j = 0; j <= k1; j++) {
		dp1[0][j] = trans1(j+1);
	}

	for(int i = 1; i < R1; i++) {
		dp1[i][0] = trans1(1);
		for(int j = 1; j <= k1; j++) {
			dp1[i][j] = add1ref(dp1[i][j-1],dp1[i-1][j]);
			// dp1[i][j] = add1(dp1[i][j],dp1[i][j-1]);
			// dp1[i][j] = add1(dp1[i][j],dp1[i-1][j]);
		}
	}
}

vector<int> querysmaller1(vector<int> q) {
	vector<int> ans = {0};

	int sumq = 0;
	for(int i = R1-1; i >= 0; i--) {
		for(int j = 0; j <= q[i]-1 && k1-j-sumq >= 0; j++) {
			if(i == 0) ans = add1(ans,trans1((int)1));
			else ans = add1(ans,dp1[i-1][k1-j-sumq]);
		}
		sumq+= q[i];
	}

	if(sumq <= k1) ans = add1(ans,trans1(1));
	return ans;
}

vector<int> findg1(vector<int> g) {
	vector<int> ans(R1,0);

	int sumans = 0;
	for(int i = R1-1; i >= 0; i--) {
		ans[i] = 0;
		for(int j = 1; j+sumans <= k1; j++) {
			ans[i] = j;
			if(!(geq1(g,querysmaller1(ans)))) {
				ans[i] = j-1;
				break;
			}
		}
		sumans+= ans[i];
	}
	return ans;
}

void decode(int32_t n, int32_t L, int32_t X[])
{
	k1 = 5*n;
	R1 = 220;
  	// clock_t tStart = clock();
	precomp1();
  	// printf("Time taken to precomp1: %.2fs\n", (double)(clock() - tStart)/CLOCKS_PER_SEC);

	vector<int> q(R1,0);
	for(int i = 0; i < L; i++) {
		q[X[i]]++;
	}
	vector<int> vm = add1(querysmaller1(q),neg(trans1(1)));


	vector<int> m(n);
	vector<vector<int>> ps;
	ps.pb(trans1(1));
	for(int i = 1; i <= n-1; i++) {
		ps.pb(mult1(ps.back(),trans1(256)));
	}
	for(int i = n-1; i >= 0; i--) {
		m[i] = 0;
		while(geq1(vm,ps[i])) {
			m[i]++;
			vm = add1(vm,neg(ps[i]));
		}
	}

	for(int i =0; i < n; i++) {
		output((int32_t) m[i]);
	}

}

Compilation message (stderr)

encoder.cpp: In function 'std::vector<long long int> mult(std::vector<long long int>, std::vector<long long int>)':
encoder.cpp:31:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |  for(int i = 0; i < s.size(); i++) {
      |                 ~~^~~~~~~~~~
encoder.cpp:32:20: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |   for(int j = 0; j < t.size(); j++) {
      |                  ~~^~~~~~~~~~
encoder.cpp:37:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |  for(int i = 0; i < ans.size(); i++) {
      |                 ~~^~~~~~~~~~~~
encoder.cpp: In function 'std::vector<long long int> add(std::vector<long long int>, std::vector<long long int>)':
encoder.cpp:51:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   51 |  for(int i = 0; i < t.size(); i++) {
      |                 ~~^~~~~~~~~~
encoder.cpp:56:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   56 |  for(int i = 0; i < ans.size(); i++) {
      |                 ~~^~~~~~~~~~~~
encoder.cpp: In function 'std::vector<long long int> addref(std::vector<long long int>&, std::vector<long long int>&)':
encoder.cpp:70:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   70 |  for(int i = 0; i < t.size(); i++) {
      |                 ~~^~~~~~~~~~
encoder.cpp:75:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   75 |  for(int i = 0; i < ans.size(); i++) {
      |                 ~~^~~~~~~~~~~~
encoder.cpp: In function 'long long int transback(std::vector<long long int>)':
encoder.cpp:99:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   99 |  for(int i = 0; i < s.size(); i++) {
      |                 ~~^~~~~~~~~~
encoder.cpp: In function 'void encode(int32_t, int32_t*)':
encoder.cpp:181:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  181 |  for(int i = 0; i < ans.size(); i++) {
      |                 ~~^~~~~~~~~~~~

decoder.cpp: In function 'std::vector<long long int> mult1(std::vector<long long int>, std::vector<long long int>)':
decoder.cpp:30:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |  for(int i = 0; i < s.size(); i++) {
      |                 ~~^~~~~~~~~~
decoder.cpp:31:20: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |   for(int j = 0; j < t.size(); j++) {
      |                  ~~^~~~~~~~~~
decoder.cpp:36:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |  for(int i = 0; i < ans.size(); i++) {
      |                 ~~^~~~~~~~~~~~
decoder.cpp: In function 'std::vector<long long int> neg(std::vector<long long int>)':
decoder.cpp:48:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   48 |  for(int i = 0; i < s.size(); i++) {
      |                 ~~^~~~~~~~~~
decoder.cpp: In function 'std::vector<long long int> add1(std::vector<long long int>, std::vector<long long int>)':
decoder.cpp:57:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   57 |  for(int i = 0; i < t.size(); i++) {
      |                 ~~^~~~~~~~~~
decoder.cpp:62:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   62 |  for(int i = 0; i < ans.size(); i++) {
      |                 ~~^~~~~~~~~~~~
decoder.cpp: In function 'std::vector<long long int> add1ref(std::vector<long long int>&, std::vector<long long int>&)':
decoder.cpp:83:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   83 |  for(int i = 0; i < t.size(); i++) {
      |                 ~~^~~~~~~~~~
decoder.cpp:88:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   88 |  for(int i = 0; i < ans.size(); i++) {
      |                 ~~^~~~~~~~~~~~
decoder.cpp: In function 'long long int trans1back1(std::vector<long long int>)':
decoder.cpp:120:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  120 |  for(int i = 0; i < s.size(); i++) {
      |                 ~~^~~~~~~~~~

• Subtask 1: 17 / 17
• Subtask 2: 17 / 17
• Subtask 3: 18 / 18
• Subtask 4: 29 / 29
• Subtask 5: 19 / 19