NrLipsa2

/* [A][M][C][B][N] / [K][R][I][P][6][8] */
#include <bits/stdc++.h>
#pragma warning(disable : 4996 4267 4068)
using namespace std;
template<typename type>
using matrix = vector<vector<type>>;
typedef long long ll;
const char sp = ' ', nl = '\n';
const int MOD = 1000000007;

int main() {
    ios::sync_with_stdio(NULL);
    cin.tie(nullptr), cout.tie(nullptr);
    (void)!freopen("nrlipsa2.in", "r", stdin);
    (void)!freopen("nrlipsa2.out", "w", stdout);
    bool F[201]{ 0 };
    bool* f = F + 100, found(0);
    int n;
    while (cin >> n)
        if (-100 <= n && n <= 100)
            f[n] = 1;

    for (int i = -100; i <= 100; ++i)
        if (!f[i]) {
            cout << i;
            found = 1;
            break;
        }
    if (!found) cout << "nu exista";
}