编程练习

#include <iostream>
using namespace std;
int main(){
    int n;
    cin>>n;
    int tempM,sumM;
    int tempR,sumR;
    sumM=0;
    sumR=0;
    tempM=100000;
    tempR=1;
    for(int i=0;i<n;i++){
        sumM+=tempM;
        sumR+=tempR;
        tempR*=2;
    }
    cout<<sumM<<endl;
    cout<<sumR<<endl;
    return 0;
}

#include <iostream>
using namespace std;
int main(){
    int num;
    cin>>num;
    if(num<100||num>999){
        cout<<"-1"<<endl;
        return 0;
    }
    for(int i=1;i<=3;i++){
        if(num%10!=0)
        {cout<<num%10;}
        num/=10;
    }
    return 0;
}

#include <iostream>
#include <cmath>
#include <iomanip>
using namespace std;
    
    double sinh(double x){
    double a=exp(x);
    double b=exp(-x);
    return (a-b)/2;
}

int main(){
    double x;
    cin>>x;
    double res=sinh(x);
    cout<<fixed<<setprecision(5)<<res<<endl;
    return 0;

}

#include <iostream>
using namespace std;
int sum(int x) {
    int total = 0;
    while (x > 0) {
        total += x % 10;
        x /= 10;
    }
    
    return total;
}

int main() {
    int num; 
    cin >> num; 
    int result = sum(num); 
    cout << result << endl;
    return 0;
}

#include <iostream>
using namespace std;

long long fac(int n) {
    if (n == 0 || n == 1) {
        return 1;
    } else {
        return n * fac(n - 1);
    }
}
int main() {
    int n;
    cin >> n;
    cout << fac(n) << endl;
    return 0;
}

#include <iostream>
#include <cmath>
using namespace std;
bool isprime(int n) {
    if (n <= 1) 
    return false;
    if (n == 2) 
    return true;
    if (n % 2 == 0) 
    return false;
    
    for (int i = 3; i * i <= n; i += 2) {
        if (n % i == 0) 
        return false;
    }
    return true;
}

int main() {
    int n;
    cin >> n;
    cout << (isprime(n) ? 1 : 0) << endl;
    return 0;
}