Submission #850139

#	Time	Username	Problem	Language	Result	Execution time	Memory
850139		divad	Speedrun (RMI21_speedrun)	C++14	33 / 100	116 ms	1620 KiB

speedrun

#include <bits/stdc++.h>
#include "speedrun.h"
#define pii pair<int, int>
using namespace std;

const int NMAX = 1002;
vector<int> v[NMAX];
int n,l,t[NMAX],tour[NMAX],pos[NMAX],k;
int st[NMAX];

void euler(int nod, int tata = -1){
    if(tata > 0){
        t[nod] = tata;
    }
    if(!pos[nod]){
        tour[++k] = nod;
        pos[nod] = k;
    }
    for(int fiu: v[nod]){
        if(fiu == tata){
            continue;
        }
        euler(fiu, nod);
    }
}

pii split(int x){
    x >>= 1;
    int mask = (1<<10)-1;
    return {x&mask, x>>10};
}

void assignHints (int subtask , int N, int A[], int B[]){
    setHintLen(41);
    n = N;
    for(int i = 1; i < N; i++){
        v[A[i]].push_back(B[i]);
        v[B[i]].push_back(A[i]);
    }
    euler(1);
    for(int i = 1; i <= n; i++){
        int val = t[i] + ((tour[pos[i]+1]) << 10);
        val <<= 1;
        pii aux = split(val);
        for(int j = 1; j <= 20; j++){
            int bt = ((val>>j)&1);
            setHint(i, j, bt);
        }
    }
}

int getWholeHint(){
    int ans = 0;
    for(int i = 1; i <= 20; i++){
        ans += (1<<i)*getHint(i);
    }
    return ans;
}

void speedrun(int subtask , int N, int start){
    n = N;
    l = getLength();
    while(start != 1){
        int val = getWholeHint();
        start = split(val).first;
        goTo(start);
    }
    int vf = 0;
    st[++vf] = 1;
    int cnt = 1;
    while(cnt != n){
        int nxt = split(getWholeHint()).second;
        while(!goTo(nxt)){
            vf--;
            goTo(st[vf]);
        }
        goTo(nxt);
        st[++vf] = nxt;
        cnt++;
    }
}

Compilation message (stderr)

speedrun.cpp: In function 'void assignHints(int, int, int*, int*)':
speedrun.cpp:44:13: warning: variable 'aux' set but not used [-Wunused-but-set-variable]
   44 |         pii aux = split(val);
      |             ^~~

• Subtask 1: 21 / 21
• Subtask 2: 0 / 8
• Subtask 3: 0 / 19
• Subtask 4: 12 / 12
• Subtask 5: 0 / 40