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#include <bits/stdc++.h>

using namespace std;

long long x,n,i,t;

int main()

{

cin>>n;

t=0;

for (i=1; i<=n; i++)

{

cin>>x;

t+=x;

}

cout<<t;

return 0;

}

Bài 1: 

#include <bits/stdc++.h>

using namespace std;

long long a[250],i,n,k;

int main()

{

cin>>n>>k;

for (i=1; i<=n; i++)

cin>>a[i];

for (i=1; i<=n; i++)

if (a[i]==k) cout<<i<<" ";

return 0;

}

26 tháng 2 2021

Program HOC24;

var d,i,n,x: integer;

t: longint;

a: array[1..32000] of integer;

begin

write('Nhap N: '); readln(n);

for i:=1 to n do

begin

write('A[',i,']='); readln(a[i]);

end;

write('Chi so cac phan tu co gia tri bang 0 la: '); 

for i:=1 to n do if a[i]=0 then write(i,' ');

writeln;

d:=0; t:=0;

write('Nhap X: '); readln(x);

for i:=1 to n do if a[i]>x then d:=d+1;

writeln('Co ',d,' phan tu co gia tri lon hon ',x);

if n=20 then

begin

for i:=5 to 20 do t:=t+a[i];

end else write('Du lieu da cho chua du 20 phan tu');

write('Tong cac phan tu co gia tri nam trong doan 5 den 20 la: ',t);

readln

end.

uses crt;

var a:array[1..250]of integer;

i,n,t,x,dem:integer;

begin

clrscr;

write('Nhap n='); readln(n);

for i:=1 to n do 

begin

write('A[',i,']='); readln(a[i]);

end;

writeln('Chi so cac phan tu co gia tri bang 0 la: ');

for i:=1 to n do 

  if a[i]=0 then write(i:4);

writeln;

write('Nhap x='); readln(x);

dem:=0;

for i:=1 to n do 

  if a[i]>x then inc(dem);

writeln('So phan tu lon hon ',x,' la: ',dem);

t:=0;

for i:=1 to n do 

  if (5<=a[i]) and (a[i]<=20) then t:=t+a[i];

writeln(t);

readln;

end.

Bài 1: 

#include <bits/stdc++.h>

using namespace std;

long long a[250],i,n,k;

int main()

{

cin>>n>>k;

for (i=1; i<=n; i++)

cin>>a[i];

for (i=1; i<=n; i++)

if (a[i]==k) cout<<i<<" ";

return 0;

}

Bài 1: 

#include <bits/stdc++.h>

using namespace std;

long long a[250],i,n,k;

int main()

{

cin>>n>>k;

for (i=1; i<=n; i++)

cin>>a[i];

for (i=1; i<=n; i++)

if (a[i]==k) cout<<i<<" ";

return 0;

}

Bài 1: 

#include <bits/stdc++.h>

using namespace std;

long long a[250],i,n,k;

int main()

{

cin>>n>>k;

for (i=1; i<=n; i++)

cin>>a[i];

for (i=1; i<=n; i++)

if (a[i]==k) cout<<i<<" ";

return 0;

}

uses crt;

var a:array[1..250]of integer;

i,n,dem,t,t1,t2,t3,t4:integer;

begin

clrscr;

repeat

write('Nhap n='); readln(n);

until (0<n) and (n<=250);

for i:=1 to n do 

  begin

repeat

write('A[',i,']='); readln(a[i]);

until (0<a[i]) and (a[i]<=500);

end;

dem:=0;

for i:=1 to n do 

  if a[i] mod 2=1 then inc(dem);

writeln('So phan tu co gia tri le la: ',dem);

t:=0;

for i:=1 to n do 

  if i mod 2=0 then t:=t+a[i];

writeln('Tong cac phan tu co chi so chan la: ',t);

t1:=0;

for i:=1 to n do 

  if i mod 2=1 then t1:=t1+a[i];

writeln('Tong cac phan tu co chi so le la: ',t1);

t2:=0;

for i:=1 to n do 

  if (i mod 2=0) and (a[i] mod 2=0) then t2:=t2+a[i];

writeln('Tong cac phan tu chan co chi so chan la: ',t2);

t3:=0;

for i:=1 to n do 

  if (i mod 2=1) and (a[i] mod 2=1) then t3:=t3+a[i];

writeln('Tong cac phan tu co chi so le la: ',t3);

t4:=0;

for i:=1 to n do 

  t4:=t4+a[i];

writeln('Trung binh cong cac so trong day la: ',t4/n:4:2);

readln;

end.

uses crt;

var a:array[1..250]of integer;

i,n,t:integer;

begin

clrscr;

write('Nhap n='); readln(n);

for i:=1 to n do

begin

write('A[',i,']='); readln(a[i]);

end;

t:=0;

for i:=1 to n do 

  if a[i] mod 2=0 then t:=t+a[i];

writeln(t);

readln;

end.