Submission #582948

#	Time	Username	Problem	Language	Result	Execution time	Memory
582948		Cyanmond	Boarding Passes (BOI22_passes)	C++17	5 / 100	3 ms	480 KiB

passes

#include <iostream>
#include <string>

using namespace std;

using i64 = long long int;

#define ALL(x) (x).begin(), (x).end()
#define REP(i, N) for (int i = 0; i < (N); ++i)
#define REP_3(i, l, r) for (int i = (l); i < (r); ++i)

void answer(const i64 x) {
    cout << x / 2;
    if (x % 2 == 1) cout << ".5" << endl;
}

int main() {
    string S;
    cin >> S;
    const int N = (int)S.size();
    i64 sum = 0;
    REP(i, N) {
        const int x = min(i, N - i - 1);
        sum += x;
    }
    answer(sum);
}

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