Submission #290625

#	Time	Username	Problem	Language	Result	Execution time	Memory
290625		Kastanda	Martian DNA (IOI16_dna)	C++11	36 / 100	23 ms	384 KiB

dna

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

string analyse(int n, int t)
{
        if (!make_test("1"))
                return string(n, '0');
        string now;
        string w = "1";
        while ((int)now.size() < n)
        {
                string extra = w;
                while (make_test(now + extra + w))
                        extra += w;
                now += extra;
                w = (w == "1") ? "0" : "1";
        }
        int le = 1, ri = n + 1, md;
        while (ri - le > 1)
        {
                md = (le + ri) >> 1;
                if (make_test(now.substr(0, md)))
                        le = md;
                else
                        ri = md;
        }
        now = now.substr(0, le);
        w = "0";
        while ((int)now.size() < n)
        {
                string extra = w;
                while (make_test(w + extra + now))
                        extra += w;
                now = extra + now;
                w = (w == "1") ? "0" : "1";
        }
        now = now.substr((int)now.size() - n, n);
        return now;
}

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