Submission #666496

#	Time	Username	Problem	Language	Result	Execution time	Memory
666496		mychecksedad	Boarding Passes (BOI22_passes)	C++17	0 / 100	1 ms	336 KiB

passes

/* Author : Mychecksdead */
#include<bits/stdc++.h>
using namespace std;
#define setp() cout << setprecision(15)
#define all(x) x.begin(), x.end()
const int N = 1e5 + 100;

int n;
string s;
double dp[N];
void solve(){
    cin >> n >> s;

    double k1 = n/2;
    double k2 = (n+1)/2;

    cout << (k1*(k1-1) + k2*(k2-1) / 4.0);
}



int main(){
    cin.tie(0); ios::sync_with_stdio(0);
    int T = 1, aa;
    // cin >> T;aa=T;
    setp();
    while(T--){
        // cout << "Case #" << aa-T << ": ";
        solve();
        cout << '\n';
    }
    return 0;
 
}

Compilation message (stderr)

passes.cpp: In function 'int main()':
passes.cpp:24:16: warning: unused variable 'aa' [-Wunused-variable]
   24 |     int T = 1, aa;
      |                ^~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 25
• Subtask 3: 0 / 30
• Subtask 4: 0 / 40