CSES - HIIT Open 2018 - Results
Submission details
Task:Inversions
Sender:Ukkonen Fan Club
Submission time:2018-05-26 11:14:03
Language:C++
Status:READY
Result:ACCEPTED
Test results
testverdicttime
#1ACCEPTED0.02 sdetails
#2ACCEPTED0.02 sdetails
#3ACCEPTED0.03 sdetails
#4ACCEPTED0.02 sdetails
#5ACCEPTED0.02 sdetails

Compiler report

input/code.cpp: In function 'int main()':
input/code.cpp:8:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i=0;i<s.size();++i){
                  ~^~~~~~~~~

Code

#include <iostream>
using namespace std;
string s;
int main(){
    ios_base::sync_with_stdio(0);cin.tie(0);
    cin >> s;
    int a=0;int b=0;
    for (int i=0;i<s.size();++i){
        a+=(s[i]=='1')==(i&1);
        b+=(s[i]=='1')!=(i&1);
    }
    cout << min(a, b) << "\n";
}

Test details

Test 1

Verdict: ACCEPTED

input
000000000000000000000000000000...

correct output
500000

user output
500000

Test 2

Verdict: ACCEPTED

input
111111111111111111111111111111...

correct output
500000

user output
500000

Test 3

Verdict: ACCEPTED

input
010101010101010101010101010101...

correct output
0

user output
0

Test 4

Verdict: ACCEPTED

input
101010101010101010101010101010...

correct output
0

user output
0

Test 5

Verdict: ACCEPTED

input
110101011010110100100111110110...

correct output
499476

user output
499476