#include "encoder.h"
#include "encoderlib.h"
#include <cstring>
#include <vector>
using namespace std;
struct bignum{
vector<short> arr;
void init(char i){
arr.clear();
arr.push_back(i);
}
};
bignum operator+(bignum a, bignum b){
for (int i=0; i<a.arr.size(); i++) {
a.arr[i] += b.arr[i];
if(a.arr[i] >= 256) {
a.arr[i] -= 256;
if(i + 1 == a.arr.size()) a.arr.push_back(0);
a.arr[i+1] ++;
}
}
for (int i=a.arr.size(); i<b.arr.size(); i++) {
a.arr.push_back(b.arr[i]);
}
return a;
}
bool operator<(bignum a, bignum b){
if(a.arr.size() != b.arr.size()) return a.arr.size() < b.arr.size();
for (int i=a.arr.size(); i>=0; i--) {
if(a.arr[i] < b.arr[i]) return 1;
if(a.arr[i] > b.arr[i]) return 0;
}
return 0;
}
bignum bino[600][600];
void encode(int N, int* M){
for (int i=0; i<600; i++) {
bino[i][0].init(1);
for (int j=1; j<=i; j++) {
bino[i][j] = bino[i-1][j] + bino[i-1][j-1];
}
for (int j=i+1; j<600; j++) {
bino[i][j].init(0);
}
}
bignum base, t;
t.init(0);
for (int i=0; i<N; i++) {
t.arr[i] = M[i];
}
base.init(0);
t = t + base;
base.init(0);
int length = 255 + 5 * N;
for(int i=0; i<5*N; i++){
while (t < bino[length-1][5 * N - i] + base) {
length--;
}
send(5 * N + 255 - length - i - 1);
base = base + bino[length-1][5 * N - i];
length--;
}
}
#include "decoder.h"
#include "decoderlib.h"
#include <algorithm>
#include <cstring>
#include <vector>
using namespace std;
struct bignum{
vector<short> arr;
void init(char i){
arr.clear();
arr.push_back(i);
}
};
bignum operator+(bignum a, bignum b){
for (int i=0; i<a.arr.size(); i++) {
a.arr[i] += b.arr[i];
if(a.arr[i] >= 256) {
a.arr[i] -= 256;
if(i + 1 == a.arr.size()) a.arr.push_back(0);
a.arr[i+1] ++;
}
}
for (int i=a.arr.size(); i<b.arr.size(); i++) {
a.arr.push_back(b.arr[i]);
}
return a;
}
bool operator<(bignum a, bignum b){
if(a.arr.size() != b.arr.size()) return a.arr.size() < b.arr.size();
for (int i=a.arr.size(); i>=0; i--) {
if(a.arr[i] < b.arr[i]) return 1;
if(a.arr[i] > b.arr[i]) return 0;
}
return 0;
}
bignum bino[600][600];
void decode(int N, int L, int X[])
{
for (int i=0; i<600; i++) {
bino[i][0].init(1);
for (int j=1; j<=i; j++) {
bino[i][j].init(0);
bino[i][j] = bino[i-1][j] + bino[i-1][j-1];
}
for (int j=i+1; j<600; j++) {
bino[i][j].init(0);
}
}
sort(X,X+L);
bignum ret;
ret.init(0);
for (int i=0; i<L; i++) {
ret = ret + bino[5 * N + 255 - X[i] - i - 2][5 * N - i];
}
while(ret.arr.size() < N)ret.push_back(0);
for (int i=0; i<N; i++) {
output(ret.arr[i]);
}
}
Compilation message
encoder.cpp: In function 'bignum operator+(bignum, bignum)':
encoder.cpp:16:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for (int i=0; i<a.arr.size(); i++) {
~^~~~~~~~~~~~~
encoder.cpp:20:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
if(i + 1 == a.arr.size()) a.arr.push_back(0);
~~~~~~^~~~~~~~~~~~~~~
encoder.cpp:24:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for (int i=a.arr.size(); i<b.arr.size(); i++) {
~^~~~~~~~~~~~~
decoder.cpp: In function 'bignum operator+(bignum, bignum)':
decoder.cpp:17:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for (int i=0; i<a.arr.size(); i++) {
~^~~~~~~~~~~~~
decoder.cpp:21:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
if(i + 1 == a.arr.size()) a.arr.push_back(0);
~~~~~~^~~~~~~~~~~~~~~
decoder.cpp:25:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for (int i=a.arr.size(); i<b.arr.size(); i++) {
~^~~~~~~~~~~~~
decoder.cpp: In function 'void decode(int, int, int*)':
decoder.cpp:60:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
while(ret.arr.size() < N)ret.push_back(0);
~~~~~~~~~~~~~~~^~~
decoder.cpp:60:33: error: 'struct bignum' has no member named 'push_back'
while(ret.arr.size() < N)ret.push_back(0);
^~~~~~~~~