| using namespace std; | |
| int main() | |
| { | |
| int t,k=1; | |
| cin>>t; | |
| while(t--) | |
| { | |
| int n,a,b,d=0; | |
| vector<int>v; | |
| vector<int>v1; | |
| cin>>n; | |
| for(int i=0;i<n;i++) | |
| { | |
| cin>>a; | |
| cin>>b; | |
| v.push_back(a+b); | |
| } | |
| for(int i=n-1,j=0;i>=0;i--) | |
| { | |
| if(v[i]>=10) | |
| { | |
| v1.push_back(v[i]%10); | |
| d=v[i]/10; | |
| v[i-1]=v[i-1]+d; | |
| d=0; | |
| } | |
| else | |
| v1.push_back(v[i]); | |
| } | |
| if(d!=0) | |
| v1.push_back(d); | |
| for(int i=v1.size()-1;i>=0;i--) | |
| cout<<""<<v1[i]; | |
| if(t) | |
| pf("\n\n"); | |
| else | |
| pf("\n"); | |
| } | |
| return 0; | |
| } | |