Submission #831726

#	Time	Username	Problem	Language	Result	Execution time	Memory
831726		OrazB	Martian DNA (IOI16_dna)	C++14	36 / 100	16 ms	400 KiB

dna

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

string analyse(int n, int t) {
    string s = "";
    while(1){
        if (s.size() == n) break;
        if (make_test(s+'0') == true) s += '0';
        else s += '1';
    }
    int l = 0, r = n-1, x = 0;
    while(l <= r){
        int md = (l+r)>>1;
        string str = ""; 
        for (int i = 0; i <= md; i++) str += s[i];
        if (make_test(str) == true){
            x = n-md-1;            
            l = md + 1;
        }else r = md - 1;
    }
    if (!x) return s;
    while(x--) s.pop_back();
    while(1){
        if (s.size() == n) return s;
        if (make_test('0'+s) == true) s = '0'+s;
        else s = '1'+s;
    }
}

Compilation message (stderr)

dna.cpp: In function 'std::string analyse(int, int)':
dna.cpp:9:22: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
    9 |         if (s.size() == n) break;
      |             ~~~~~~~~~^~~~
dna.cpp:26:22: 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 (s.size() == n) return s;
      |             ~~~~~~~~~^~~~
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