TONGDS C++

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

int n,i,s,x;
int a[1000000]
void nhap()
{
    cin>>n;
    for(int i=1;i<=n;i++) 
        cin>>a[i];
}
void giai()
{
    s=0;
    for(int i=1;i<=n;i++)
        if(a[i]%2==1)
            s=s+a[i];
    cout<<s;
}

int main(){
    freopen("tongds.inp","r",stdin);
    freopen("tongds.out","w",stdout);
    nhap();
    giai();
}