#include <bits/stdc++.h> using namespace std; int n; int t[1000006]; int main(){ scanf("%d", &n); int maks = 0; for (int i = 1; i <= n; ++i){ int a;scanf("%d", &a); maks = max(maks,a); ++t[a]; } for (int i = 0; i <= 1000000; ++i){ if (t[i] == 0 && i > maks) break; if (t[i] == 1 && i >= maks){ printf("%d\n", i); return 0; } t[i + 1] += t[i] / 2; } }
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 | #include <bits/stdc++.h> using namespace std; int n; int t[1000006]; int main(){ scanf("%d", &n); int maks = 0; for (int i = 1; i <= n; ++i){ int a;scanf("%d", &a); maks = max(maks,a); ++t[a]; } for (int i = 0; i <= 1000000; ++i){ if (t[i] == 0 && i > maks) break; if (t[i] == 1 && i >= maks){ printf("%d\n", i); return 0; } t[i + 1] += t[i] / 2; } } |