Submission #831678

#	Time	Username	Problem	Language	Result	Execution time	Memory
831678		OrazB	Martian DNA (IOI16_dna)	C++14	0 / 100	8 ms	372 KiB

dna

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

map <string,bool>  mp;

int A(string s, char c){
    s += c;
    string str = "";
    for (int i = s.size()-1; i >= s.size()-10; i--){
        str += s[i];
    }
    reverse(str.begin(), str.end());
    if (mp[str] == true) return 1;
    return 0; 
}
int B(string s, char c){
    s = c+s;
    string str = "";
    for (int i = 0; i < 10; i++){
        str += s[i];
    }
    if (mp[str] == true) return 1;
    return 0; 
}

string analyse(int n, int t) {
    // if (n <= 100){
    //     string s = "";
    //     while(1){
    //         if (s.size() == n) return s;
    //         if (make_test(s+'0') == true) s += '0';
    //         else if (make_test(s+'1') == true) s += '1';
    //         else break;
    //     }
    //     while(1){
    //         if (s.size() == n) return s;
    //         if (make_test('0'+s) == true) s = '0'+s;
    //         else if (make_test('1'+s) == true) s = '1'+s;
    //         else break;
    //     }
    // }
    string str = "";
    for (int mask = 0; mask < (1<<10); mask++){
        string s = "";
        for (int i = 0; i < 10; i++){
            if (mask&(1<<i)) s += '1';
            else s += '0';
        }
        bool tr = make_test(s);
        mp[s] = tr;
        if (tr == true) str = s;
    }
    while(1){
        if (str.size() == n) return str;
        if (A(str, '0')) str += '0';
        else if (A(str, '1')) str += '1';
        else break;
    }
    while(1){
        if (str.size() == n) return str;
        if (B(str, '0') == true) str = '0'+str;
        else if (B(str, '1') == true) str = '1'+str;
        else break;
    }
}

Compilation message (stderr)

dna.cpp: In function 'int A(std::string, char)':
dna.cpp:11:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   11 |     for (int i = s.size()-1; i >= s.size()-10; i--){
      |                              ~~^~~~~~~~~~~~~~
dna.cpp: In function 'std::string analyse(int, int)':
dna.cpp:56:24: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   56 |         if (str.size() == n) return str;
      |             ~~~~~~~~~~~^~~~
dna.cpp:62:24: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   62 |         if (str.size() == n) return str;
      |             ~~~~~~~~~~~^~~~
dna.cpp:67:1: warning: control reaches end of non-void function [-Wreturn-type]
   67 | }
      | ^
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