Submission #38581

#	Time	Username	Problem	Language	Result	Execution time	Memory
38581		oTTo_22	Sequence (BOI14_sequence)	C++14	0 / 100	0 ms	2364 KiB

sequence

#include <bits/stdc++.h>
#define se second
#define fi first
using namespace std;

int main () {

    ios_base::sync_with_stdio(false);
    cin.tie(0);
  
    int n;
    cin >> n;

    //for (int i=1; i<=11111; i++)
    //    cout << 9 << " ";
    //return 0;

    bool ind=0;
    int a[n+1];

    cin >> a[1];

    for (int i=2; i<=n; i++) {
        cin >> a[i];
        if (a[i]!=a[i-1])
            ind=1;
    }

    if (!ind) {
        int m=0;
        int N=n;
        while (n>0) {
            n/=10;
            m++;
        }

        string ans9;
        if (a[1]==9) {
            for (int i=1; i<=m; i++)
                ans9+='8';
            int kk=N/10;
            if (N%10<=1)
                ans9.erase(ans9.size()-1,1);

            ans9+='9';
            cout << ans9;
            return 0;
        }

        if (pow(10,m-1)==N)
            m--;

        string s;
        int k=a[1]-1;
        for (int i=1; i<=m-1; i++)
            s+='0';

        if (a[1]==0)
            cout << 1 << a[1] << s << 0;
        else
            cout << a[1] << s << 0;
    }

    return 0;
}

Compilation message (stderr)

sequence.cpp: In function 'int main()':
sequence.cpp:41:17: warning: unused variable 'kk' [-Wunused-variable]
             int kk=N/10;
                 ^
sequence.cpp:54:13: warning: unused variable 'k' [-Wunused-variable]
         int k=a[1]-1;
             ^

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