checkIfallElementspresent.cpp

#include<bits/stdc++.h>
using namespace std;

bool checkValid(vector<vector<int>>& matrix) {
        int n=matrix[0].size();
        int trueSum=n*(n*(n+1))/2;
        int sum=0;
        for(auto i:matrix){
            sum+=accumulate(i.begin(),i.end(),0);
        }
        
        if(sum==trueSum){
            return true;
        }
        return false;
    }

    int main(){
        vector<vector<int>> x={{15,7,18,11,19,10,14,16,8,2,3,6,5,1,17,12,9,4,13},{17,15,9,8,11,13,7,6,5,1,3,16,12,19,10,2,4,14,18},{19,14,12,10,8,9,17,16,4,3,13,18,1,5,7,11,2,15,6},{4,2,10,15,19,16,8,9,5,3,1,11,13,14,6,18,12,17,7},{13,19,9,16,5,8,6,12,14,11,18,10,7,2,3,4,15,17,1},{4,7,18,11,17,16,5,12,10,1,15,13,14,6,19,2,3,9,8},{14,5,15,1,18,6,12,7,8,9,3,13,2,10,19,4,11,16,17},{10,3,1,8,14,19,11,18,15,13,9,12,16,17,7,4,5,2,6},{14,13,19,18,7,2,4,8,10,17,12,5,15,1,6,9,11,3,16},{19,8,10,18,16,12,11,17,4,9,7,2,5,13,15,3,6,1,14},{1,10,6,14,7,18,3,9,4,16,5,11,13,17,15,8,19,2,12},{13,10,5,16,1,19,17,3,9,11,7,8,12,6,4,2,14,15,18},{17,2,1,6,9,19,18,14,4,11,12,13,16,5,8,7,3,10,15},{1,4,10,5,13,6,18,11,3,2,15,14,16,12,17,19,8,9,7},{2,14,3,12,16,17,11,9,1,6,5,19,10,13,4,18,7,15,8},{15,9,8,18,14,13,4,12,5,17,6,1,11,16,19,3,7,2,10},{15,8,12,16,13,2,6,19,18,14,10,5,11,9,7,1,3,17,4},{15,6,17,7,5,3,1,9,19,12,10,11,16,14,18,8,2,13,4},{6,11,10,14,2,13,16,1,9,15,8,19,17,3,5,18,7,4,12}};
        cout<<checkValid(x)<<endl;
    }