Submission #974874

#	Time	Username	Problem	Language	Result	Execution time	Memory
974874		hirayuu_oj	Martian DNA (IOI16_dna)	C++17	36 / 100	11 ms	600 KiB

dna

#include "dna.h"
#include<bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0; i<n; i++)
#define all(x) x.begin(),x.end();
string randchr(){
    int s=rand();
    rep(i,10){
        s*=rand();
        s++;
        s^=s>>13;
        s^=s<<15;
        s^=s>>17;
    }
    if(s%2==0){
        return "1";
    }
    else{
        return "0";
    }
}
std::string analyse(int n, int t) {
    string s="";
    int cnt=0;
    rep(i,n){
        s+=randchr();
        if(make_test(s)){
            cnt=0;
        }
        else{
            s.back()^=1;
            cnt++;
            if(cnt==20)break;
        }
    }
    while(cnt>0){
        if(make_test(s)){
            break;
        }
        s.pop_back();
        cnt--;
    }
    while(s.size()<n){
        s="0"+s;
        if(!make_test(s)){
            s[0]='1';
        }
    }
    return s;
}

Compilation message (stderr)

dna.cpp: In function 'std::string analyse(int, int)':
dna.cpp:43:19: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   43 |     while(s.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: 0 / 64