| 8 | #define optimize() ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0); |
| 9 | #define endl '\n' |
| 10 | int calcu(vector<int>&v) |
| 11 | { |
| 12 | |
| 13 | map<int,int>m; |
| 14 | int i,b,c; |
| 15 | b=-1,c=-1; |
| 16 | for(i=0;i<v.size();i++) |
| 17 | { |
| 18 | m[v[i]]++; |
| 19 | } |
| 20 | for(i=0;i<v.size()+1;i++) |
| 21 | { |
| 22 | if(m[i]>0)m[i]--; |
| 23 | else |
| 24 | { |
| 25 | b=i; |
| 26 | break; |
| 27 | } |
| 28 | } |
| 29 | for(i=0;i<v.size()+1;i++) |
| 30 | { |
| 31 | if(m[i]>0)m[i]--; |
| 32 | else |
| 33 | { |
| 34 | c=i; |
| 35 | break; |
| 36 | } |
| 37 | } |
| 38 | v.clear(); |
| 39 | |
| 40 | return b+c; |
| 41 | } |
| 42 | int main() |
| 43 | { |
| 44 | optimize(); |