Submission #162295

#	Time	Username	Problem	Language	Result	Execution time	Memory
162295		popovicirobert	Martian DNA (IOI16_dna)	C++14	36 / 100	15 ms	452 KiB

dna

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

using namespace std;

std::string analyse(int n, int t) {
    srand(time(NULL));

    if(make_test("0") == 0) {
        string sol;
        sol.resize(n);
        fill(sol.begin(), sol.end(), '1');
        return sol;
    }

    string sol = "0";
    int cnt = 0;

    while(sol.size() < n) {
        sol.push_back(rand() % 2 + '0');
        if(make_test(sol)) {
            cnt = 0;
            continue;
        }
        sol.back() = '0' + ((sol.back() - '0') ^ 1);
        cnt++;
        if(cnt == 12) {
            break;
        }
    }
    while(cnt > 0 && make_test(sol) == 0) {
        sol.pop_back();
        cnt--;
    }
    while(sol.size() < n) {
        sol = "0" + sol;
        if(make_test(sol)) {
            continue;
        }
        sol[0] = '1';
    }
    return sol;
}

Compilation message (stderr)

dna.cpp: In function 'std::__cxx11::string analyse(int, int)':
dna.cpp:19:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     while(sol.size() < n) {
           ~~~~~~~~~~~^~~
dna.cpp:35:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     while(sol.size() < n) {
           ~~~~~~~~~~~^~~
grader.cpp: In function 'bool make_test(std::__cxx11::string)':
grader.cpp:14:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i < p.size(); i++) {
                  ~~^~~~~~~~~~
grader.cpp:23:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 1; i <= ss.size(); i++) {
                  ~~^~~~~~~~~~~~
grader.cpp:28:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if (pr[i] == p.size()) {

• Subtask 1: 11 / 11
• Subtask 2: 25 / 25
• Subtask 3: 0 / 64