├── Check if Every Row and Column Contains All Elements(CPP)
└── Sum of Upper and Lower Triangles(CPP)


/Check if Every Row and Column Contains All Elements(CPP):
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 1 | class Solution {
 2 | public:
 3 |     bool checkValid(vector<vector<int>>& matrix) {
 4 |         int a=matrix.size();
 5 |         int b=matrix[0].size();
 6 |         for(int i=0;i<a;i++){
 7 |             map<int,int>mp;
 8 |             for(int j=0;j<a;j++){
 9 |                 mp[matrix[i][j]]++;
10 |             }
11 |             for(int j=1;j<=a;j++){
12 |                 if(mp[j]!=1){
13 |                     return false;
14 |                 }
15 |             }
16 |         }
17 |         for(int j=0;j<b;j++){
18 |             map<int,int>mp;
19 |             for(int i=0;i<b;i++){
20 |                 mp[matrix[i][j]]++;
21 |             }
22 |             for(int i=1;i<=a;i++){
23 |                 if(mp[i]!=1){
24 |                     return false;
25 |                 }
26 |             }
27 |         }
28 |         return true;
29 |     }
30 | };
31 | 


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/Sum of Upper and Lower Triangles(CPP):
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 1 | #include<bits/stdc++.h>
 2 | using namespace std;
 3 | class Solution
 4 | {   
 5 |     public:
 6 |     vector<int> sumTriangles(const vector<vector<int> >& matrix, int n)
 7 |     {
 8 |         vector<int> a;
 9 |         int d=0;
10 |         int e=0;
11 |         int f=0;
12 |         for(int i=0;i<n;i++){
13 |             for(int j=0;j<n;j++){
14 |                 if(i==j){
15 |                     d+=matrix[i][j];
16 |                 }
17 |                 else if(i<j){
18 |                     e+=matrix[i][j];
19 |                 }
20 |                 else if(i>j){
21 |                     f+=matrix[i][j];
22 |                 }
23 |             }
24 |         }a.push_back(d+e);
25 |         a.push_back(d+f);
26 |         return a;
27 |     }
28 | };
29 | int main() {
30 | int t;
31 | cin>>t;
32 | while(t--)
33 | {
34 | int n;
35 | cin>>n;
36 | vector<vector<int> > matrix(n); for(int i=0; i<n; i++)
37 | {
38 | matrix[i].assign(n, 0); 
39 | for(int j=0; j<n; j++)
40 | {
41 | cin>>matrix[i][j];
42 | }
43 | Solution ob;
44 | vector<int> result = ob.sumTriangles (matrix,n); 
45 | for (int i = 0; i < result.size(); ++i){
46 | cout<<result[i]<<" ";
47 | }
48 | cout<<endl;
49 | return 0;
50 | }
51 | 


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