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![](https://rs.olm.vn/images/avt/0.png?1311)
uses crt;
const fi='dulieu.inp';
var f1:text;
a:array[1..100]of integer;
n,i,t1,t2:integer;
begin
clrscr;
assign(f1,fi); reset(f1);
readln(f1,n);
for i:=1 to n do
read(f1,a[i]);
t1:=0;
t2:=0;
for i:=1 to n do
begin
if a[i]>0 then t1:=t1+a[i];
if a[i]<0 then t2:=t2+a[i];
end;
writeln('Tong cac so duong la: ',t1);
writeln('Tong cac so am la: ',t2);
close(f1);
readln;
end.
![](https://rs.olm.vn/images/avt/0.png?1311)
const fi='dl.inp';
fo='dl.out';
var f1,f2:text;
st:string;
i,d:integer;
begin
assign(f1,fi); reset(f1);
assign(f2,fo); rewrite(f2);
readln(f1,st);
d:=length(st);
for i:=2 to d-1 do
write(f2,st[i]);
close(f1);
close(f2);
end.
![](https://rs.olm.vn/images/avt/0.png?1311)
const fi='input.txt';
fo='output.txt';
var f1,f2:text;
a:array[1..100]of integer;
i,n,t:integer;
begin
assign(f1,fi); reset(f1);
assign(f2,fo); rewrite(f2);
n:=0;
while not eof(f1) do
begin
inc(n);
read(f1,a[n]);
end;
t:=0;
for i:=1 to n do t:=t+a[i];
write(f2,t);
close(f1);
close(f2);
end.
![](https://rs.olm.vn/images/avt/0.png?1311)
#include <bits/stdc++.h>
using namespace std;
long long s,i,n;
int main()
{
cin>>n;
s=0;
for (i=1; i<=n; i++)
if (i%3==0) s=s+i;
cout<<s;
return 0;
}
![](https://rs.olm.vn/images/avt/0.png?1311)
uses crt;
var i,t:integer;
begin
clrscr;
t:=0;
for i:=1 to 100 do
if i mod 5<>0 then t:=t+i;
writeln(t);
readln;
end.
![](https://rs.olm.vn/images/avt/0.png?1311)
program du_lieu;
uses crt;
var i,n:integer;
a:array[1..100]of integer;
tbc:real;
f:text;
begin
clrscr;
assign(f,'DULIEU.INP');reset(f);
readln(f,n);
for i:=1 to n do
begin
read(f,a[i]);
end;
close(f);
for i:=1 to n do
tbc:=tbc+a[i];
writeln(tbc/n);
readln;
end.
const fi='baitap.out';
var f1:text;
i,t:integer;
begin
assign(f1,fi); rewrite(f1);
t:=0;
for i:=1 to 20 do
t:=t+i;
writeln(f1,t);
close(f1);
end.