Submission #534440

#	Time	Username	Problem	Language	Result	Execution time	Memory
534440		MrDeboo	Combo (IOI18_combo)	C++17	0 / 100	3059 ms	200 KiB

combo

#include "combo.h"
#include <bits/stdc++.h>
// #define int long long
using namespace std;
std::string guess_sequence(int n) {
    srand(time(NULL));
    char f[]={'A','B','X','Y'};
    string s;
    vector<char>ve;
    for(auto &i:f)ve.push_back(i);
    vector<char>v=ve;
    int cnt=0;
    while(s.size()!=n){
        bool bl=0;
        map<char,bool>mp;
        cnt++;
        for(int w=0;w<v.size()-1;w++){
            string G;
            G+=v[w];
            for(int i=0;i<50;i++){
                if(s.size()==0){
                    char a=ve[rand()%ve.size()];
                    while(a==G[0]){
                        a=ve[rand()%ve.size()];
                    }
                }
                else G+=ve[rand()%ve.size()];
            }
            int k=press(s+G);
            if(k>s.size()){
                int F=s.size();
                if(k!=G.size()+F)mp[G[k-s.size()]]=1;
                for(int i=0;i<k-F;i++){
                    s+=G[i];
                }
                bl=1;
                break;
            }
        }
        if(!bl)s+=v.back();
        if(cnt==1){
            vector<int>a;
            for(auto i:ve)if(i!=s[0])a.push_back(i);
            ve.clear();
            while(a.size()){
                ve.push_back(a.back());
                ve.pop_back();
            }
        }
        vector<char>V;
        for(auto i:ve)if(!mp[i])V.push_back(i);
        v=V;
    }
    return s;
  // std::string p = "";
  // for (int i = 0; i < 4 * N; ++i) {
  //   p += 'A';
  // }
  // int coins = press(p);
  // std::string S = "";
  // for (int i = 0; i < N; ++i) {
  //   S += 'A';
  // }
  // return S;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:13:19: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   13 |     while(s.size()!=n){
      |           ~~~~~~~~^~~
combo.cpp:17:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   17 |         for(int w=0;w<v.size()-1;w++){
      |                     ~^~~~~~~~~~~
combo.cpp:30:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |             if(k>s.size()){
      |                ~^~~~~~~~~
combo.cpp:32:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |                 if(k!=G.size()+F)mp[G[k-s.size()]]=1;
      |                    ~^~~~~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 95