Submission #1062857

#	Time	Username	Problem	Language	Result	Execution time	Memory
1062857		TimDee	Floppy (RMI20_floppy)	C++17	Compilation error	0 ms	0 KiB

floppy

    // Guess who we ran into at the shops?
    // Walking in circles like she was lost
    // Didn't you hear?
    // They called it all off
     
    #include "floppy.h"
    #include <algorithm>
    #include <bitset>
    #include <cassert>
    #include <chrono>
    #include <cmath>
    #include <deque>
    #include <iomanip>
    #include <iostream>
    #include <map>
    #include <queue>
    #include <random>
    #include <set>
    #include <string>
    #include <vector>
    typedef long long ll;
    typedef long double ld;
    using namespace std;
     
    struct sgt
    {
        vector<pair<int, int> > st;
        int n;
        void init(vector<int> v)
        {
            n = v.size();
            st.resize(v.size() * 2);
            for (int i = n; i < 2 * n; i++) st[i] = { v[i - n], i - n };
            for (int i = n - 1; i > 0; i--) st[i] = max(st[i * 2], st[i * 2 + 1]);
        }
        int query(int l, int r)
        {
            pair<int, int> p(-1, -1);
            for (l += n, r += n + 1; l < r; l >>= 1, r >>= 1)
            {
                if (l & 1) p = max(p, st[l++]);
                if (r & 1) p = max(p, st[--r]);
            }
            return p.second;
        }
    };
     
    sgt s;
     
    void make(int l, int r, string& ans)
    {
        if (r < l) return;
        int i = s.query(l, r);
        if (l < i) ans.push_back('1');
        else ans.push_back('0');
        if (r > i) ans.push_back('1');
        else ans.push_back('0');
        make(l, i - 1, ans);
        make(i + 1, r, ans);
    }
     
    void read_array(int subtask_id, const vector<int> &v) 
    {
        s.init(v);
        string ans;
      if (n<=500)
        make(0, v.size() - 1, ans);
      else {for(int i=0; i<v.size()-1; ++i) ans+="10"; ans+="00";}
        save_to_floppy(ans);
    }
     
    int tim = 0; // :) :wave:
    int val;
    vector<int> v2;
    int dfs(int u, const string &b)
    {
        int x = val, siz = 1; val--;
        if (b[u * 2] == '1') siz += dfs(u + 1, b);
        v2[tim++] = x;
        if (b[u * 2 + 1] == '1') siz += dfs(u + siz, b);
        return siz;
    }
     
    vector<int> solve_queries(int subtask_id, int n, const string &bits, const vector<int> &a, const vector<int> &b) 
    {
        val = n - 1;
        v2.resize(n, -1);
        dfs(0, bits);
        s.init(v2);
        vector<int> ans;
        for (int i = 0; i < a.size(); i++) ans.push_back(s.query(a[i], b[i]));
        return ans;
    }

Compilation message (stderr)

floppy.cpp: In function 'void read_array(int, const std::vector<int>&)':
floppy.cpp:66:11: error: 'n' was not declared in this scope
   66 |       if (n<=500)
      |           ^
floppy.cpp:68:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   68 |       else {for(int i=0; i<v.size()-1; ++i) ans+="10"; ans+="00";}
      |                          ~^~~~~~~~~~~
floppy.cpp: In function 'std::vector<int> solve_queries(int, int, const string&, const std::vector<int>&, const std::vector<int>&)':
floppy.cpp:91:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   91 |         for (int i = 0; i < a.size(); i++) ans.push_back(s.query(a[i], b[i]));
      |                         ~~^~~~~~~~~~
stub.cpp: In function 'void run2()':
stub.cpp:101:30: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  101 |     if (query_answers.size() != M) {
      |         ~~~~~~~~~~~~~~~~~~~~~^~~~