Submission #1090764

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
1090764	2024-09-18T17:33:10 Z	Tymond	Saveit (IOI10_saveit)	C++17	Compilation error	0 ms	0 KB

encoder

#include "grader.h"
#include "encoder.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
#define fi first
#define se second
#define vi vector<int>
#define vll vector<long long>
#define pii pair<int, int>
#define pll pair<long long, long long>
#define pb push_back
#define mp make_pair
#define eb emplace_back
#define all(x) (x).begin(), (x).end()
#define sz(x) (int)(x).size()
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
mt19937_64 rng64(chrono::steady_clock::now().time_since_epoch().count());
inline int rand(int l,int r){return uniform_int_distribution<int>(l, r)(rng);}
inline ll rand(ll l,ll r){return uniform_int_distribution<ll>(l, r)(rng64);}
#ifdef DEBUG
auto&operator<<(auto&o,pair<auto,auto>p){return o<<"("<<p.first<<", "<<p.second<<")";}
auto operator<<(auto&o,auto x)->decltype(x.end(),o){o<<"{";int i=0;for(auto e:x)o<<","+!i++<<e;return o<<"}";}
#define debug(X...)cerr<<"["#X"]: ",[](auto...$){((cerr<<$<<"; "),...)<<endl;}(X)
#else
#define debug(...){}
#endif

struct custom_hash {
    static uint64_t splitmix64(uint64_t x) {
        x += 0x9e3779b97f4a7c15;
        x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;
        x = (x ^ (x >> 27)) * 0x94d049bb133111eb;
        return x ^ (x >> 31);
    }

    size_t operator()(uint64_t x) const {
        static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count();
        return splitmix64(x + FIXED_RANDOM);
    }
};

const int MAXN = 1e3 + 7;
const int MAXH = 40;
int dist[MAXH][MAXN];
int rep[MAXN];
int parent[MAXN];
vi g[MAXN];
vi gt[MAXN];
int n, h, m;

int Find(int a){
    if(a == rep[a]){
        return a;
    }
    return rep[a] = Find(rep[a]);
}

void Union(int a, int b){
    rep[Find(a)] = Find(b);
}

void dfs(int v, int p){
    parent[v] = p;
    for(auto u : g[v]){
        if(u == p){
            continue;
        }
        dfs(u, v);
    }
}

void countDist(int start){
    dist[start][start] = 0;
    queue<int> q;
    q.push(start);
    while(sz(q)){
        int v = q.front();
        q.pop();
 
        for(auto u : gt[v]){
            if(u == start){
                continue;
            }
            if(dist[start][u] == 0){
                dist[start][u] = dist[start][v] + 1;
                q.push(u);
            }
        }
    }
}

void encode(int nv, int nh, int ne, int *v1, int *v2){
    n = nv;
    h = nh;
    m = ne;
    for(int i = 0; i < n; i++){
        rep[i] = i;
    }
    for(int i = 0; i < m; i++){
        if(Find(v1[i]) != Find(v2[i])){
            g[v1[i]].pb(v2[i]);
            g[v2[i]].pb(v1[i]);
            Union(v1[i], v2[i]);
        }
        gt[v1[i]].pb(v2[i]);
        gt[v2[i]].pb(v1[i]);
    }

    dfs(0, 0);
    for(int i = 1; i < n; i++){
        for(int y = 0; y < 10; y++){
            if(parent[i] & (1 << y)){
                encode_bit(1);
            }else{
                encode_bit(0);
            }
        }
    }

    for(int i = 0; i < h; i++){
        countDist(i);
    }

    for(int j = 0; j < h; j++){
        for(int i = 0; i < n; i++){
            if(i + 2 >= n){
                if(dist[j][i] == dist[j][parent[i]]){
                    encode_bit(0);
                    encode_bit(0);
                }else if(dist[j][i] == dist[j][parent[i]] - 1){
                    encode_bit(0);
                    encode_bit(1);
                }else{
                    encode_bit(1);
                    encode_bit(1);
                }
                continue;
            }

            int r = 0;
            for(int y = i; y <= i + 2; y++){
                r = r * 3 + (dist[j][i] - dist[j][parent[i]] + 1);
            }

            for(int y = 0; y < 5; y++){
                if((1 << y) & r){
                    encode_bit(1);
                }else{
                    encode_bit(0);
                }
            }
            i += 2;
        }
    }

    return;
}

decoder

#include "grader.h"
#include "decoder.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
#define fi first
#define se second
#define vi vector<int>
#define vll vector<long long>
#define pii pair<int, int>
#define pll pair<long long, long long>
#define pb push_back
#define mp make_pair
#define eb emplace_back
#define all(x) (x).begin(), (x).end()
#define sz(x) (int)(x).size()
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
mt19937_64 rng64(chrono::steady_clock::now().time_since_epoch().count());
inline int rand(int l,int r){return uniform_int_distribution<int>(l, r)(rng);}
inline ll rand(ll l,ll r){return uniform_int_distribution<ll>(l, r)(rng64);}
#ifdef DEBUG
auto&operator<<(auto&o,pair<auto,auto>p){return o<<"("<<p.first<<", "<<p.second<<")";}
auto operator<<(auto&o,auto x)->decltype(x.end(),o){o<<"{";int i=0;for(auto e:x)o<<","+!i++<<e;return o<<"}";}
#define debug(X...)cerr<<"["#X"]: ",[](auto...$){((cerr<<$<<"; "),...)<<endl;}(X)
#else
#define debug(...){}
#endif

struct custom_hash {
    static uint64_t splitmix64(uint64_t x) {
        x += 0x9e3779b97f4a7c15;
        x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;
        x = (x ^ (x >> 27)) * 0x94d049bb133111eb;
        return x ^ (x >> 31);
    }

    size_t operator()(uint64_t x) const {
        static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count();
        return splitmix64(x + FIXED_RANDOM);
    }
};

const int MAXN = 1e3 + 7;
const int MAXH = 40;
int dist[MAXH][MAXN];
int parent[MAXN];
vi g[MAXN];
int n, h;

void countDist(int start){
    dist[start][start] = 0;
    queue<int> q;
    q.push(start);
    while(sz(q)){
        int v = q.front();
        q.pop();
 
        for(auto u : g[v]){
            if(u == start){
                continue;
            }
            if(dist[start][u] == 0){
                dist[start][u] = dist[start][v] + 1;
                q.push(u);
            }
        }
    }
}

void decode(int nv, int nh) {
    n = nv;
    h = nh;

    for(int i = 1; i < n; i++){
        for(int y = 0; y < 10; y++){
            if(decode_bit()){
                parent[i] += (1 << y);
            }
        }
        g[i].pb(parent[i]);
        g[parent[i]].pb(i);
    }

    for(int i = 0; i < n; i++){
        sort(all(g[i]));
    }

    for(int i = 0; i < h; i++){
        countDist(i);
    }

    for(int j = 0; j < h; j++){
        vi vec(n, 0);
        for(int i = 0; i < n; i++){
            if(i + 2 >= n){
                int x = decode_bit();
                int y = decode_bit();
                if(x == 0){
                    vec[i] = -y;
                }else{
                    vec[i] = 1;
                }
                continue;
            }

            int r = 0;
            for(int y = 0; y < 5; y++){
                r += (decode_bit() * (1 << y));
            }
            for(int y = i + 2; y >= i; y--){
                vec[y] = (r % 3) - 1;
                r /= 3;
            }

            i += 2;
        }

        queue<int> q;
        q.push(j);
        for(int i = 0; i < n; i++){
            dist[j][i] = -1;
        }
        dist[i][i] = 0;
        while(sz(q)){
            int v = q.front();
            q.pop();

            for(auto u : g[v]){
                if(u == parent[v] && dist[j][u] == -1){
                    dist[j][u] = dist[j][v] - vec[u];
                    q.push(u);
                }
                if(dist[j][u] == -1 && u != parent[v]){
                    dist[j][u] = dist[j][v] + vec[u];
                    q.push(u);
                }   
            }
        }
    }

    for(int i = 0; i < h; i++){
        for(int j = 0; j < n; j++){
            hops(i, j, dist[i][j]);
        }
    }

    return;
}

Compilation message

decoder.cpp: In function 'void decode(int, int)':
decoder.cpp:124:14: error: 'i' was not declared in this scope
  124 |         dist[i][i] = 0;
      |              ^