Submission #498814

#	Time	Username	Problem	Language	Result	Execution time	Memory
498814		SlavicG	Speedrun (RMI21_speedrun)	C++17	Compilation error	0 ms	0 KiB

speedrun

#include "speedrun.h"
#include "bits/stdc++.h"
using namespace std;
 
#define pb push_back
#define sz(a) (int)a.size()

/*
void setHintLen (int l){}
void setHint(int i, int j, bool b){}
int getLength(){}
bool getHint(int j){}
bool goTo(int x){}
*/

void dfsHint(int u, int par, vector<vector<int>>& adj, vector<int>& right_neighbor, vector<int>& parent, vector<int>& left_child){
    parent[u] = par;
    vector<int> nodes;
    for(int v: adj[u]){
        if(v == par)continue;
        dfsHint(v, u, adj, right_neighbor, parent, left_child);
        nodes.pb(v);
    }
    if(sz(nodes))left_child[i] = nodes[0];
    for(int i = 0;i + 1 < sz(nodes); ++i){
        right_neighbor[nodes[i]] = nodes[i + 1];
    }
}
void assignHints(int subtask , int n, int a[], int b[]){
    setHintLen(30);

    vector<vector<int>> adj(n + 1);
    for(int i = 1;i <= n - 1; ++i){
        adj[a[i]].pb(b[i]);
        adj[b[i]].pb(a[i]);
    }  
    vector<int> right_neighbor(n + 1, 0), parent(n + 1, 0), left_child(n + 1, 0);
    dfsHint(1, 0, adj, right_neighbor, parent, left_child);

    for(int i = 1;i <= n; ++i){
        int idx = 1;
        for(int j = 9;j >= 0; --j){
            if(parent[i] & (1 << j))setHint(i, idx, 1);
            ++idx;
        }
        for(int j = 9;j >= 0; --j){
            if(left_child[i] & (1 << j))setHint(i, idx, 1);
            ++idx;
        }
        for(int j = 9;j >= 0; --j){
            if(right_neighbor[i] & (1 << j))setHint(i, idx, 1);
            ++idx;
        }
    }
}

void dfs(int u, vector<bool>& vis){
    int lc = 0, rn = 0, par = 0, idx = 1;

    for(int j = 9;j >= 0; --j){
        if(getHint(idx))par += (1 << j);
        ++idx;
    }
    for(int j = 9;j >= 0; --j){
        if(getHint(idx))lc += (1 << j);
        ++idx;
    }
    for(int j = 9;j >= 0; --j){
        if(getHint(idx))rn += (1 << j);
        ++idx;
    }

    if(vis[u]){
        if(par == 0)exit(0);
        goTo(par);
        dfs(par, vis);
    }

    vis[u] = true;

    if(lc && !vis[lc]){
        goTo(lc);
        dfs(lc, vis);
    }

    if(rn && !vis[rn]){
        goTo(par);
        goTo(rn);
        dfs(rn, vis);
    }
    if(par != 0){
        goTo(par);
        dfs(par, vis);
    }else exit(0);
}
void speedrun(int subtask, int n, int start){
    int l = getLength();
    vector<bool> vis(n + 1, false);
    dfs(start, vis);
}

/*
int main(){

}
*/

Compilation message (stderr)

speedrun.cpp: In function 'void dfsHint(int, int, std::vector<std::vector<int> >&, std::vector<int>&, std::vector<int>&, std::vector<int>&)':
speedrun.cpp:24:29: error: 'i' was not declared in this scope
   24 |     if(sz(nodes))left_child[i] = nodes[0];
      |                             ^
speedrun.cpp: In function 'void speedrun(int, int, int)':
speedrun.cpp:97:9: warning: unused variable 'l' [-Wunused-variable]
   97 |     int l = getLength();
      |         ^