Submission #285788

#	Time	Username	Problem	Language	Result	Execution time	Memory
285788		kevlee	Martian DNA (IOI16_dna)	C++17	100 / 100	14 ms	384 KiB

dna

#include "dna.h"
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define mod 1000000007
#define h1 7897897897897897
#define h2 7897466719774591
#define b1 98762051
#define b2 98765431
#define inf 1000000000
#define pi 3.1415926535897932384626
#define LMAX 9223372036854775807
#define ll long long
#define fi first
#define se second
#define pii pair<int, int>
#define pll pair<ll, ll>
#define vi vector<int>
#define vl vector<ll>
#define vp vector<pii>
#define SET(a, b) memset(a, b, sizeof(a));
#define all(x) (x).begin(), (x).end()
#define FOR(i, a, b) for (int i = (a); i <= (b); i++)
#define FORD(i, a, b) for (int i = (a); i >= (b); i--)
int init(int n, char c) {
  int lo = 1, hi = n, ans = 0;
  while (lo <= hi) {
    int mid = (lo + hi) / 2;
    string s = string(mid, c);
    if (make_test(s)) {
      ans = mid;
      lo = mid + 1;
    } else {
      hi = mid - 1;
    }
  }
  return ans;
}
int bs(int n, string str) {
  int lo = 1, hi = n, ans = 0;
  while (lo <= hi) {
    int mid = (lo + hi) / 2;
    if (make_test(str.substr(0, mid))) {
      ans = mid;
      lo = mid + 1;
    } else {
      hi = mid - 1;
    }
  }
  return ans;
}
string analyse(int n, int t) {
  int maxzero = init(n, '0');
  if (maxzero == 0) {
    return string(n, '1');
  }
  string s = string(maxzero, '0');
  int rem = n - maxzero, cnt = maxzero;
  while (rem > 0 && cnt <= maxzero) {
    if (make_test(s + "1")) {
      s += "1";
      cnt = 0;
    } else {
      s += "0";
      cnt++;
    }
    rem--;
  }
  rem = n - bs(s.length(), s);
  s = s.substr(0, n - rem);
  while (rem > 0) {
    if (make_test("0" + s)) s = "0" + s;
    else s = "1" + s;
    rem--;
  }
  return s;
}                       

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