Submission #831638

#	Time	Username	Problem	Language	Result	Execution time	Memory
831638		KemalK	Martian DNA (IOI16_dna)	C++17	0 / 100	1 ms	212 KiB

dna

#include "dna.h"
#include <bits/stdc++.h>
#include <cstdlib>
using namespace std;

std::string analyse(int n, int t) {
    string ans = "";
    if (n <= 5){
        cout << "first" << "\n";
        bool ok = false;
        for (int mask = 0; mask < (1<<n) - 1; mask++){
            string cur = "";
            for (int j = 0; j < n; j++){
                if (mask>>j&1){
                    cur += "1";
                }
                else{
                    cur += "0";
                }
            }
            ok = make_test(cur);
            if (ok){
                return cur;
            }
        }
        if (!ok){
            for(int i = 0; i < n; i++){
                ans += "1";
            }
            return ans;
        }
    }
    else if (n <= 100 and n > 5){
        while (1){
            if (make_test(ans + "0")){
                ans += '0';
            }
            else if (make_test(ans + "1")){
                ans += '1';
            }
            else{
                break;
            }
        }
        while(1){
            if (make_test("1" + ans)){
                ans = '1' + ans;
            }
            else if (make_test("0" + ans)){
                ans = '0' + ans;
            }
            else{
                break;
            }
        }
        return ans;
    }
    return ans;
}                       

Compilation message (stderr)

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: 0 / 11
• Subtask 2: 0 / 25
• Subtask 3: 0 / 64