Submission #301787

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
301787	2020-09-18 08:08:14	tatyam	Saveit (IOI10_saveit)	C++17	100 / 100	689 ms	11504 KiB

encoder

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#include <bits/stdc++.h>
using namespace std;
const int INF = 0x3fffffff;
template<class T> bool chmin(T& a, const T& b){ if(a > b){ a = b; return 1; } return 0; }
void encode_bit(int b);
void encode(int N, int H, int P, int A[], int B[]);
void encode_num(int num, int size){
    for(int i = size; i--; ) encode_bit(num >> i & 1);
}
using BigInt = array<int, 1585>; // 1000 * log_2(3) = 1585
void encode_BigInt(vector<int> B){ // ternary to binary
    BigInt a;
    a.fill(0);
    reverse(B.begin(), B.end());
    for(int b : B){
        for(int i = a.size() - 1; i--; ) a[i + 1] += a[i];
        if(b & 1) a[0]++;
        if(b & 2) a[1]++;
        for(int i = 0; i < a.size() - 1; i++){
            a[i + 1] += a[i] >> 1;
            a[i] &= 1;
        }
    }
    for(int i : a) encode_bit(i);
}
void encode(int N, int H, int P, int A[], int B[]){
    vector<vector<int>> g(N);
 
 
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decoder

 
 
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Compilation message (stderr)

encoder.cpp: In function 'void encode_BigInt(std::vector<int>)':
encoder.cpp:22:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::array<int, 1585>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |         for(int i = 0; i < a.size() - 1; i++){
      |                        ~~^~~~~~~~~~~~~~

decoder.cpp: In function 'std::vector<int> decode_BigInt(int)':
decoder.cpp:25:51: warning: comparison of integer expressions of different signedness: 'int' and 'std::array<int, 1585>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |         for(int i = a.size() - 1; i--; ) if(i + 2 < a.size() && a[i + 2] || a[i + 1] && a[i]){
      |                                             ~~~~~~^~~~~~~~~~
decoder.cpp:25:62: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   25 |         for(int i = a.size() - 1; i--; ) if(i + 2 < a.size() && a[i + 2] || a[i + 1] && a[i]){

• Subtask 1: 25 / 25
• Subtask 2: 25 / 25
• Subtask 3: 25 / 25
• Subtask 4: 25 / 25