Submission #380425

#	Time	Username	Problem	Language	Result	Execution time	Memory
380425		denkendoemeer	Martian DNA (IOI16_dna)	C++14	100 / 100	13 ms	512 KiB

dna

#include<bits/stdc++.h>
#include "dna.h"
using namespace std;
mt19937 ran(time(0));
string analyse(int n,int t)
{
    string s="";
    int w=0;
    while(w<16){
        char x='0'+ran()%2;
        if (make_test(s+x))
            s=s+x,w=0;
        else
            s=s+(char)(x^1),w++;
    }
    int st=0,dr=16,mij;
    while(st<=dr){
        mij=(st+dr)/2;
        if (make_test(s.substr(0,s.size()-mij)))
            dr=mij-1;
        else
            st=mij+1;
    }
    s=s.substr(0,s.size()-st);
    while(s.size()<n){
        if (make_test('0'+s))
            s='0'+s;
        else
            s='1'+s;
    }
    return s;
}

Compilation message (stderr)

dna.cpp: In function 'std::string analyse(int, int)':
dna.cpp:25:19: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   25 |     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