Submission #831679

#	Time	Username	Problem	Language	Result	Execution time	Memory
831679		KemalK	Martian DNA (IOI16_dna)	C++17	100 / 100	11 ms	472 KiB

dna

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

std::string analyse(int n, int t) {
    string ans = "";
    int l = 0, r = n;
    while (l < r){
        int mid = (l + r + 1)>>1;
        string cur = "";
        for (int i = 0; i < mid; i++){
            cur += "0";
        }
        if (make_test(cur)){
            l = mid;
        }
        else{
            r = mid - 1;
        }
    }
    for (int i = 0; i < l; i++){
        ans += "0";
    }
    int k = 0;
    while(ans.size() < n && k <= l){
        if (make_test(ans + "1")){
            k = 0;
            ans += "1";
        }
        else{
            k++;
            ans += "0";
        }
    }
    while(k--){
        ans.pop_back();
    }
    while(make_test(ans + "0")){
        ans += "0";
    }
    while(ans.size() < n){
        if (make_test("1" + ans)){
            ans = "1" + ans;
        }
        else{
            ans = "0" + ans;
        }
    }
    return ans;
}                       

Compilation message (stderr)

dna.cpp: In function 'std::string analyse(int, int)':
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 |     while(ans.size() < n && k <= l){
      |           ~~~~~~~~~~~^~~
dna.cpp:42:22: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   42 |     while(ans.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