Submission #434382

#	Time	Username	Problem	Language	Result	Execution time	Memory
434382		79brue	Martian DNA (IOI16_dna)	C++14	0 / 100	11 ms	544 KiB

dna

#include <bits/stdc++.h>
#include "dna.h"

using namespace std;

typedef long long ll;

string analyse(int n, int t){
    int MIN = 1, MAX = n, ANS = 0;
    while(MIN <= MAX){
        int MID = (MIN + MAX) / 2;
        if(make_test(string(MID, '0'))){
            ANS = MID;
            MIN = MID + 1;
        }
        else MAX = MID - 1;
    }

    if(!ANS) return string(n, '1');

    string str (1, ANS);
    int cnt = ANS;
    while(cnt <= ANS){
        if(!make_test(str + '1')){
            cnt++;
            str += '0';
        }
        else{
            cnt = 0;
            str += '1';
        }
    }

    while(cnt--) str.pop_back();

    MIN = 1, MAX = n, ANS = 0;
    while(MIN <= MAX){
        int MID = (MIN + MAX) / 2;
        if(make_test(str + string(MID, '0'))){
            ANS = MID;
            MIN = MID + 1;
        }
        else MAX = MID - 1;
    }
    str += string(ANS, '0');

    while((int)str.size() < n){
        if(make_test("1" + str)) str = "1" + str;
        else str = "0" + str;
    }

    return str;
}

Compilation message (stderr)

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: 0 / 11
• Subtask 2: 0 / 25
• Subtask 3: 0 / 64