Submission #107668

#	Time	Username	Problem	Language	Result	Execution time	Memory
107668		patrikpavic2	Sequence (BOI14_sequence)	C++17	34 / 100	365 ms	888 KiB

sequence

#include <cstdio>
#include <cstring>
#include <cstdlib>
#include <ctime>
#include <algorithm>
#include <set>
#include <vector>
#include <queue>
#include <map>

#define X first
#define Y second
#define PB push_back

using namespace std;

typedef long long ll;
typedef long double ld;
typedef pair < int, int > pii;
typedef vector < int > vi;
typedef set < int > si;

const int N = 1e5 + 500;
const int M = 1e6 + 500;
const int INF = 0x3f3f3f3f;
const int MOD = 1e9 + 7;
const int OFF = (1 << 18);
const int LOG = 20;
const double EPS = 1e-9;
const double PI = 3.1415926535;

int n, x, a[N], tr[N];
ll fin = (ll)INF * INF;

bool inside(int i,int k){
    for(;k;k /= 10)
        if(k % 10 == i && k != 0) return 1;
    return 0;
}

vector < int > v;

int main(){
    scanf("%d", &n);
    if(n <= 1000){
        for(int i = 0;i < n;i++) scanf("%d", a + i);
        for(int st = 0;st < 10000;st++){
            memset(tr, 0, sizeof(tr));
            int bad = 0;
            for(int i = 0;i < n;i++){
                if(!inside(a[i], st + i)) bad = 1, tr[a[i]] = 1;
            }

            ll ans = st, pot = 10000LL, lst = -1;
            //printf("ANS %lld POT %lld\n", ans, pot);
            for(int i = 9;i >= 1;i--){
                //printf("%d", tr[i]);
                if(tr[i]){
                    ans += i * pot;
                    lst = i * pot;
                    pot *= 10LL;
                }
            }
            //printf("\nST: %d\n", st);
            if(tr[0]) {
                if(lst != -1)
                    ans += 9 * lst;
                else
                    ans += 100000LL;
            }
            //printf("%lld\n", ans);
            //char c; scanf("%c", &c);
            if(ans) fin = min(fin, ans);
        }
        printf("%lld\n", fin);
        return 0;
    }
    scanf("%d", &x);
    if(x == 0){
        int pot = 1;
        while(pot - (pot / 10 * 9) - 1 < n){
            pot = 10 * pot + 1;
        }
        printf("%d\n", (pot / 10 * 9) + 1);
        return 0;
    }
    if(x == 9){
        int pot = 1, pot2 = 1;
        while(pot2 - (pot / 10 * 8) - 1 < n){
            pot = 10 * pot + 1;
            pot2 = 10 * pot2;
        }
        printf("%d\n", (pot / 10 * 8) + 1);
        return 0;
    }
    printf("%d", x);
    for(int i = 1;i < n;i *= 10) printf("0");
    printf("\n");
    return 0;
}

Compilation message (stderr)

sequence.cpp: In function 'int main()':
sequence.cpp:49:17: warning: variable 'bad' set but not used [-Wunused-but-set-variable]
             int bad = 0;
                 ^~~
sequence.cpp:44:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &n);
     ~~~~~^~~~~~~~~~
sequence.cpp:46:39: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         for(int i = 0;i < n;i++) scanf("%d", a + i);
                                  ~~~~~^~~~~~~~~~~~~
sequence.cpp:78:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &x);
     ~~~~~^~~~~~~~~~

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