Submission #786928

#	Time	Username	Problem	Language	Result	Execution time	Memory
786928		PagodePaiva	Martian DNA (IOI16_dna)	C++14	100 / 100	11 ms	380 KiB

dna

#include "dna.h"
#include <bits/stdc++.h>
#include <cstdlib>
#define pb push_back
#define all(v) v.begin(), v.end()

using namespace std;
string res;
string per;

string analyse(int n, int t) {

    int con = 0;
    vector <int> bk;

    // frente

    while(res.size() < n){
        // cout << ":)\n";
        string aux;
        aux = per;
        int t = rand() % 2;

        aux.pb('0' + t);

        if(aux.size() > n and con == 0){
            break;
        }

        else if(con > 0 and aux.size() > n){
            for(int i = 0;i < con;i++){
                if(res.size() == n) break;
                res.pb('0'+bk[i]);
                if(!make_test(res)){
                    res.pop_back();
                    break;
                }
            }
            break;
        }

        if(make_test(aux)){
            res = aux;
            per = aux;
            con = 0;
            bk.clear();
        }

        else{
            aux.pop_back();
            aux.pb('0'+(t+1)%2);
            per = aux;
            bk.push_back((t+1)%2);
            con++;
            if(con >= 15){
                for(int i = 0;i < con;i++){
                    res.pb('0'+bk[i]);
                    if(!make_test(res)){
                        res.pop_back();
                        break;
                    }
                }
                break;
            }
        }
    }

    // bunda

    while(res.size() < n){
        reverse(all(res));
        res.pb('0');
        reverse(all(res));

        if(!make_test(res)){
            reverse(all(res));
            res.pop_back();
            res.pb('1');
            reverse(all(res));
        }
    }

    return res;
}                       

Compilation message (stderr)

dna.cpp: In function 'std::string analyse(int, int)':
dna.cpp:18:22: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   18 |     while(res.size() < n){
      |           ~~~~~~~~~~~^~~
dna.cpp:26:23: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   26 |         if(aux.size() > n and con == 0){
      |            ~~~~~~~~~~~^~~
dna.cpp:30:40: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   30 |         else if(con > 0 and aux.size() > n){
      |                             ~~~~~~~~~~~^~~
dna.cpp:32:31: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   32 |                 if(res.size() == n) break;
      |                    ~~~~~~~~~~~^~~~
dna.cpp:70:22: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   70 |     while(res.size() < n){
      |           ~~~~~~~~~~~^~~
grader.cpp: In function 'bool make_test(std::string)':
grader.cpp:14:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   14 |  for (int i = 0; i < p.size(); i++) {
      |                  ~~^~~~~~~~~~
grader.cpp:23:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |  for (int i = 1; i <= ss.size(); i++) {
      |                  ~~^~~~~~~~~~~~
grader.cpp:28:13: warning: comparison of integer expressions of different signedness: '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'} and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |   if (pr[i] == p.size()) {

• Subtask 1: 11 / 11
• Subtask 2: 25 / 25
• Subtask 3: 64 / 64