Submission #107661

#	Time	Username	Problem	Language	Result	Execution time	Memory
107661		dfistric	Sequence (BOI14_sequence)	C++14	0 / 100	2 ms	384 KiB

sequence

#include <bits/stdc++.h>

#define FOR(i, a, b) for (int i = (a); i < (b); i++)
#define FORd(i, a, b) for (int i = (a); i >= (b); i--)
#define REP(i, n) FOR(i, 0, n)
#define ll long long

using namespace std;

const int MAXN = 100100;
ll arr[MAXN];

int main() {
    ios_base::sync_with_stdio(false);
 
    int n;
    cin >> n;
    REP(i, n) cin >> arr[i];

    n--;
    ll t = 1;
    while (t <= n) t *= 10;

    if (arr[0] == 0) cout << 10LL * t << "\n";
    else {
        if (arr[0] == 9) {
            if (n == 1) {
                cout << "89\n";
                return 0;
            }

            ll out = 0;
            while (t) {
                out += t * 8;
                t /= 10;
            }
            cout << out + 1 << endl;
        } else {
            cout << arr[0] * t << "\n";
        }
    }

    return 0;
}

• Subtask 1: 0 / 9
• Subtask 2: 0 / 33
• Subtask 3: 0 / 25
• Subtask 4: 0 / 33