Submission #598028

#	Time	Username	Problem	Language	Result	Execution time	Memory
598028		Pyishtell	Martian DNA (IOI16_dna)	C++17	100 / 100	14 ms	420 KiB

dna

#include "dna.h"
 
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
 
std::string analyse(int n, int t) {
    int start=0, end=n;
    while(end-start>1){
        int middle=(start+end)/2;
        if(make_test(string(middle,'0'))) start=middle;
        else end=middle;
    }
    string s=string(start,'0');
    int index=0;
    while(index<=start){
        if(make_test(s+'1')) s=s+'1', index=0;
        else s=s+'0', index++;
    }
    start=s.size()-start-1, end=s.size();
    while(end-start>1){
        int middle=(start+end)/2;
        if(make_test(s.substr(0,middle))) start=middle;
        else end=middle;
    }
    s=s.substr(0,start);
    while(s.size()<n){
        if(make_test('1'+s)) s='1'+s;
        else s='0'+s;
    }
    return s;
}

Compilation message (stderr)

dna.cpp: In function 'std::string analyse(int, int)':
dna.cpp:27:19: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   27 |     while(s.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