Submission #847400

#	Time	Username	Problem	Language	Result	Execution time	Memory
847400		TahirAliyev	Speedrun (RMI21_speedrun)	C++17	100 / 100	139 ms	2184 KiB

speedrun

#include "speedrun.h"
#include <bits/stdc++.h>
 
using namespace std;
 
const int MAX = 2002;
 
int par[MAX];
vector<int> g[MAX];
vector<int> tour;
 
string convert(int a){
    string s = "";
    while(a){
        if(a % 2) s += '1';
        else s += '0'; 
        a /= 2;
    }
    while(s.size() < 10){
        s += '0';
    }
    return s;
}
 
int convert2(string s){
    int a = 0;
    for(int i = 0; i < s.size(); i++){
        a += (1 << i) * (s[i] == '1');
    }
    return a;
}
 
void dfs(int node, int p){
    par[node] = p;
    tour.push_back(node);
    for(int to : g[node]){
        if(to == p) continue;
        dfs(to, node);
    }
}
 
 
void assignHints(int subtask, int N, int A[], int B[]) {
    for(int i = 1; i < N; i++){
        g[A[i]].push_back(B[i]);
        g[B[i]].push_back(A[i]);
    }
    setHintLen(20);
    dfs(1, 0);
    for(int i = 1; i <= N; i++){
        string s = convert(par[i]);
        for(int j = 1; j <= 10; j++){
            setHint(i, j, (s[j - 1] == '1'));
        }
    }
    for(int i = 1; i <= N; i++){
        if(i == N) continue;
        string s = convert(tour[i]);
        for(int j = 11; j <= 20; j++){
            setHint(tour[i - 1], j, (s[j - 11] == '1'));
        }
    }
    for(int j = 11; j <= 20; j++){
        setHint(tour[N - 1], j, 0);
    }
}   
 
void speedrun(int subtask, int N, int start) {
    int nxt = -1, p = 0;
    while(start != 1){
        string s1 = "";
        for(int j = 1; j <= 10; j++){
            if(getHint(j)){
                s1 += '1';
            }
            else{
                s1 += '0';
            }
        }
        p = convert2(s1);
        goTo(p);
        start = p;
    }
    while(true){
        string s1 = "", s2 = "";
        for(int j = 1; j <= 10; j++){
            if(getHint(j)){
                s1 += '1';
            }
            else{
                s1 += '0';
            }
        }
        for(int j = 11; j <= 20; j++){
            if(getHint(j)){
                s2 += '1';
            }
            else{
                s2 += '0';
            }
        }
        p = convert2(s1);
        if(nxt == -1){
            nxt = convert2(s2);
        }
        if(nxt == 0) break;
        if(goTo(nxt)){
            start = nxt;
            nxt = -1;
        }
        else{
            goTo(p);
            start = p;
        }
    }
}

Compilation message (stderr)

speedrun.cpp: In function 'int convert2(std::string)':
speedrun.cpp:27:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |     for(int i = 0; i < s.size(); i++){
      |                    ~~^~~~~~~~~~

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