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#include<iostream>
using namespace std;
int main(){
float a[10], sum=0, proiz=1;
int i,j,n,k,l;
cout<<"Vvedite elementy massiva";
for(i=0; i<n; i++) cin>>a[i]>>"\n";
float max=a[0],min=a[0];
for(i=0;i<=n;i++){
if(a[i]<0) sum+=a[i];
if(max>a[i]) k=i;
if(min<a[i]) l=i;
};
cout<<"\nsum="<<sum<<"\n";
while(i<=n){
if(l<k) for(i=l;i<=k;i++) proiz*=a[i]; else for(i=k;i<=l;i++) proiz*=a[i];};
cout<<"\nproiz="<<proiz;
for (i=0;i<=n-1;i++)
for (j=i+1;j<=n;i++)
if(a[i]>a[j]){
sum=a[i];
a[i]=a[j];
a[j]=sum;
}
for(i=0;i<=n;i++){cout<<"\na[i]="<<a[i]<<"\n";};
system("pause");
return 0;
}
#include <iostream>
#include <vector>
using namespace std;
#define ll long long
#define ld long double
ll find_sum(vector<vector<ll>> a){
ll sum = 0;
for(ll i = 0; i < a.size(); i++)
for(ll j = 0; j < a[i].size(); j++)
if(i == j)
sum += a[i][j];
return sum;
}
signed main(){
ll n,m;
cin >> n >> m;
vector<vector<ll>> a(n);
for(ll i = 0; i < n; i++){
vector<ll> temp(m);
for(ll j = 0; j < m; j++)
cin >> temp[j];
a[i] = temp;
}
cout << find_sum(a);
}