Submission #34529

#	Time	Username	Problem	Language	Result	Execution time	Memory
34529		top34051	Martian DNA (IOI16_dna)	C++14	100 / 100	13 ms	2020 KiB

dna

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

string analyse(int n, int t) {
    int i,l,r,mid,len,cnt;
    string s;
    //longest 0s
    l = 0; r = n; len = 0;
    while(l<=r) {
        mid = (l+r)/2;
        if(make_test(string(mid,'0'))) {
            len = mid;
            l = mid+1;
        }
        else r = mid-1;
    }
    s = string(len,'0');
    cerr << s << endl;
    //right
    cnt = s.size();
    while(1) {
        if(make_test(s+'1')) s = s + '1', cnt = 0;
        else s = s + '0', cnt++;
        if(cnt>len) break;
    }
    cerr << s << endl;
    //del right
    l = 0; r = s.size(); len = 0;
    while(l<=r) {
        mid = (l+r)/2;
        if(make_test(s.substr(0,mid))) {
            len = mid;
            l = mid+1;
        }
        else r = mid-1;
    }
    s = s.substr(0,len);
    cerr << s << endl;
    //left
    len = s.size();
    for(i=0;i<n-len;i++) {
        if(make_test('1'+s)) s = '1' + s;
        else s = '0' + s;
    }
    return s;
}

Compilation message (stderr)

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: 64 / 64