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Câu 1:
#include <bits/stdc++.h>
using namespace std;
long long i,n,k,dem,x;
int main()
{
cin>>n;
cin>>k;
dem=0;
for (i=1; i<=n; i++)
{
cin>>x;
if (x==k) dem++;
}
cout<<dem;
return 0;
}
uses crt;
var a,vtmax,vtmin:array[1..100]of integer;
n,i,max,min,dem,t,dem1,t1,dem2,t2,dem3,t3,dem4,t4,k:integer;
begin
clrscr;
write('Nhap n='); readln(n);
for i:=1 to n do
begin
write('A[',i,']='); readln(a[i]);
end;
max:=a[1];
for i:=1 to n do
if max<a[i] then max:=a[i];
writeln('So lon nhat trong day la: ',max);
dem:=0;
t:=0;
for i:=1 to n do
if max=a[i] then
begin
inc(dem);
t:=t+a[i];
vtmax[dem]:=i;
end;
if dem>1 then
begin
writeln('Tong cac so max la: ',t);
writeln('Cac vi tri co so max la: ');
for i:=1 to dem do
write(vtmax[i]:4);
end;
min:=a[1];
for i:=1 to n do
if min>a[i] then min:=a[i];
writeln('So nho nhat trong day la: ',min);
dem1:=0;
t1:=0;
for i:=1 to n do
if min=a[i] then
begin
inc(dem1);
t1:=t1+a[i];
vtmin[dem1]:=i;
end;
if dem1>1 then
begin
writeln('Tong cac so min la: ',t1);
writeln('Cac vi tri co so min la: ');
for i:=1 to dem1 do
write(vtmin[i]:4);
end;
write('Nhap k='); readln(k);
dem2:=0;
t2:=0;
for i:=1 to n do
if (i mod 2=0) and (a[i] mod k=0) then
begin
dem2:=dem2+1;
t2:=t2+a[i];
end;
writeln('So phan tu o vi tri chan trong day la boi cua ',k,' la: ',dem2);
writeln('Tong cac so o vi tri chan trong day la boi cua ',k,' la: ',t2);
dem3:=0;
t3:=0;
for i:=1 to n do
if (i mod 2=1) and (k mod a[i]=0) then
begin
inc(dem3);
t3:=t3+a[i];
end;
writeln('So phan tu o vi tri le trong day la uoc cua ',k,' la: ',dem3);
writeln('Tong cac so o vi tri le trong day la uoc cua ',k,' la: ',t3);
dem4:=0;
t4:=0;
for i:=1 to n do
if (a[i]+k=1) or (a[i]=k+1) then
begin
inc(dem4);
t4:=t4+a[i];
end;
writeln('So phan tu la anh em cua ',k,' trong day la: ',dem4);
writeln('Tong cac phan tu la anh em cua ',k,' trong day la: ',t4);
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..1000]of integer;
i,n,k,dem:integer;
begin
clrscr;
write('Nhap n='); readln(n);
for i:=1 to n do
begin
write('A[',i,']='); readln(a[i]);
end;
write('Nhap k='); readln(k);
for i:=1 to n do
if a[i]=k then
begin
writeln(i);
break;
end;
dem:=0;
for i:=1 to n do
if a[i]=k then inc(dem);
if dem>0 then writeln('Co ',dem,' phan tu bang ',k)
else writeln('Khong co phan tu nao bang ',k);
readln;
end.
Câu 1:
var a:array[1..100]of integer;
Câu 2:
uses crt;
var a:array[1..10]of integer;
i:integer;
begin
clrscr;
for i:=1 to 10 do
begin
write('A[',i,']='); readln(a[i]);
end;
for i:=1 to 10 do
write(a[i]:4);
readln;
end.
Câu 3:
uses crt;
var a:array[1..15]of integer;
i,n,t:integer;
begin
clrscr;
repeat
write('Nhap n='); readln(n);
until (0<n) and (n<=15);
for i:=1 to n do
begin
repeat
write('A[',i,']='); readln(a[i]);
until a[i]<=100;
end;
writeln('Mang da nhap la: ');
for i:=1 to n do
write(a[i]:4);
writeln;
t:=0;
for i:=1 to n do
if a[i] mod 3=0 then t:=t+a[i];
writeln('Tong cac phan tu chia het cho 3 la: ',t);
writeln('Cac so chan o vi tri le trong day la: ');
for i:=1 to n do
if (a[i] mod 2=0) and (i mod 2=1) then write(a[i]:4);
readln;
end.
a:
#include <bits/stdc++.h>
using namespace std;
long long n,i,a[10000];
int main()
{
cin>>n;
for (i=1;i<=n; i++)
cin>>a[i];
for (i=1; i<=n; i++)
cout<<a[i]<<" ";
return 0;
}
uses crt;
var n,k,i,t:integer;
a:array[1..100]of integer;
begin
clrscr;
write('Nhap n='); readln(n);
for i:=1 to n do
begin
write('A[',i,']='); readln(a[i]);
end;
write('Nhap k='); readln(k);
t:=0;
for i:=1 to n do
if a[i] mod k=0 then t:=t+a[i];
writeln('Tong cac so chia het cho ',k,' trong day la: ',t);
readln;
end.
uses crt;
var a:array[1..255]of integer;
i,n,k,kt:integer;
begin
clrscr;
write('Nhap n='); readln(n);
for i:=1 to n do
begin
write('A[',i,']='); readln(a[i]);
end;
write('Nhap k='); readln(k);
kt:=0;
for i:=1 to n do
if a[i]=k then kt:=1;
if kt=0 then writeln(k,' khong co trong day')
else writeln(k,' co trong day');
readln;
end.
\(\dfrac{s}{13}=\dfrac{2s}{3-vn}+\dfrac{2s}{3+vn}\)
\(\dfrac{s}{13}=\dfrac{2s\left(3+vn\right)+2s\left(3-vn\right)}{9-vn^2}\)
\(\dfrac{s}{13}=\dfrac{12s}{9-vn^2}\)
\(s\left(9-vn^2\right)=12s\cdot13\)
\(s\left(9-vn^2\right)=156s\)
\(9-vn^2=156\)
\(vn^2=-147\)