Submission #521645

#	Time	Username	Problem	Language	Result	Execution time	Memory
521645		M_W	Martian DNA (IOI16_dna)	C++14	0 / 100	11 ms	396 KiB

dna

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

string analyse(int N, int T){
	int l = 0, r = N;
	while(l < r){
		int mid = (l + r + 1) >> 1;
		string tmp = "";
		for(int i = 0; i < mid; i++) tmp += "0";
		bool t = make_test(tmp);
		
		if(t) l = mid;
		else r = mid - 1;
	}
	string a = "";
	for(int i = 0; i < l; i++) a += "0";
	int cnt = l;
	while(cnt <= l){
		string test = a + "1";
		bool t = make_test(test);
		
		if(t){
			cnt = 0;
			a += "1";
		}
		else{
			cnt++;
			a += "0";
		}
	}
	while(a.back() == '0') a.pop_back();
	int l2 = 0, r2 = l;
	while(l2 < r2){
		int mid = (l2 + r2 + 1) >> 1;
		string tmp = a;
		for(int i = 0; i < mid; i++) tmp += "0";
		bool t = make_test(tmp);
		
		if(t) l2 = mid;
		else r2 = mid - 1;
	}
	for(int i = 0; i < l2; i++) a += "0";
	
	int len = a.size();
	for(int i = len; i <= N; i++){
		bool t = make_test("1" + a);
		
		if(t) a = "1" + a;
		else a = "0" + a;
	}
	return a;
}

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