1.
#include <iostream>
#include <fstream>
using namespace std;
int main()
{
string s1,s2="";
ifstream fileInput("du lieu.txt");
ofstream fileOutput("ket qua.txt");
fileInput>>s1;
for(int i=0;i<s1.size();i++){
if(s1[i]>='0'&&s1[i]<='9'){
s2+=s1[i];
}
}
fileOutput<<s2;
fileInput.close();
fileOutput.close();
//samon247
return 0;
}
2.
#include <iostream>
using namespace std;
int main()
{
int m,n,total=0;
cin>>m>>n;
for(;m<=n;m++){
total+=m;
}
cout<<total;
//samon247
return 0;
}
3.
#include <iostream>
using namespace std;
int main()
{
int n,ln=0,cs=0;
cin>>n;
int arr[n];
for(int i=0;i<n;i++){
cin>>arr[i];
if(ln<arr[i]){
ln=arr[i];
}
}
for(int i=0;i<n;i++){
if(arr[i]==ln){
cs++;
}
}
int arr1[cs],css=0;
for(int i=0;i<n;i++){
if(arr[i]==ln){
arr1[css]=i;
css++;
}
}
cout<<"Phan tu lon nhat trong mang: "<<ln<<"\nChi so cua cac phan tu co cung gia tri voi gia tri lon nhat: ";
for(int i=0;i<cs;i++){
cout<<arr1[i]<<" ";
}
//samon247
return 0;
}