Submission #412259

#	Time	Username	Problem	Language	Result	Execution time	Memory
412259		nxteru	Martian DNA (IOI16_dna)	C++14	100 / 100	14 ms	380 KiB

dna

#include "dna.h"
using namespace std;
string analyse(int n,int t){
    int l=0,r=n+1;
    while(r-l>1){
        int m=(l+r)/2;
        if(make_test(string(m,'0')))l=m;
        else r=m;
    }
    string s(l,'0');
    int p=0;
    while(p<=l){
        s+='1';
        if(!make_test(s)){
            s.back()='0';
            p++;
        }else p=0; 
    }
    s=s.substr(0,s.size()-l-1);
    while(1){
        if(!make_test(s+'0'))break;
        s+='0';
    }
    while(s.size()<n){
        s='1'+s;
        if(!make_test(s))s[0]='0';
    }
    return s;
}                       

Compilation message (stderr)

dna.cpp: In function 'std::string analyse(int, int)':
dna.cpp:24:19: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   24 |     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