Submission #127538

#	Time	Username	Problem	Language	Result	Execution time	Memory
127538		Osama_Alkhodairy	Martian DNA (IOI16_dna)	C++17	100 / 100	15 ms	416 KiB

dna

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

std::string analyse(int n, int t) {
    int l = 0, r = n;
    while(l <= r){
        int mid = (l + r) / 2;
        if(make_test(string(mid, '0'))) l = mid + 1;
        else r = mid - 1;
    }
    string ret = string(r, '0');
    int zeros = 0;
    while(ret.size() != n){
        if(make_test("1" + ret)){
            ret = '1' + ret;
            zeros = 0;
        }
        else{
            ret = '0' + ret;
            zeros++;
        }
        if(zeros > r) break;
    }
    l = 0, r = (int)ret.size() - 1;
    while(l <= r){
        int mid = (l + r) / 2;
        if(make_test(ret.substr(mid))) r = mid - 1;
        else l = mid + 1;
    }
    ret = ret.substr(l);
    while(ret.size() != n){
        if(make_test(ret + "0")) ret += '0';
        else ret += '1';
    }
    return ret;
}

Compilation message (stderr)

dna.cpp: In function 'std::__cxx11::string analyse(int, int)':
dna.cpp:15:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     while(ret.size() != n){
           ~~~~~~~~~~~^~~~
dna.cpp:33:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     while(ret.size() != n){
           ~~~~~~~~~~~^~~~
grader.cpp: In function 'bool make_test(std::__cxx11::string)':
grader.cpp:14:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i < p.size(); i++) {
                  ~~^~~~~~~~~~
grader.cpp:23:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 1; i <= ss.size(); i++) {
                  ~~^~~~~~~~~~~~
grader.cpp:28:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if (pr[i] == p.size()) {

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