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Bài 6:
#include <bits/stdc++.h>
using namespace std;
int main () {
int n;
cin >> n;
int p=n/60;
int s=n%60;
if (p<60) {
if (p<10) {
if (s<10) cout <<"00:0" << p << ":0" << s; else cout <<"00:0" << p << ":" << s;} else
if ((p>=10) and (p<60)) {if (s<10) cout << "00:" << p << ":0" << s;
else cout << "00:" << p << ":" << s;}}
if (p>=60) {
int h = p/60;
p = p%60;
if (h<10) { if (p<10) {
if (s<10) cout << "0" << h << ":" << "0" << p <<":0" <<s;
else cout << "0" << h << ":" << "0" << p <<":" <<s; } else {
if (s<10) cout << "0" << h << ":" << p <<":0" <<s;
else cout << "0" << h << ":" << p <<":" <<s;} } else {
if (p<10) { if (s<10) cout << h << ":" << "0" << p <<":0" <<s;
else cout << h << ":" << "0" << p <<":" <<s; } else {
if (s<10) cout << h << ":" << p <<":0" <<s;
else cout << h << ":" << p <<":" <<s;} } }
return 0;
}
Bài 5:
#include <bits/stdc++.h>
using namespace std;
int main () {
int n;
cin >> n;
int m=n;
int t100 = n/100;
n = n - t100 * 100;
int t50 = n/50;
n = n - t50*50;
int t20 = n/20;
n = n - t20*20;
int t10 = n/10;
n = n - t10*10;
int t5 = n/5;
n = n - t5*5;
int t2 = n/2;
n = n - t2*2;
int t1 = n;
if (m>=100) cout << t100 << " to menh gia 100" << endl;
if (t50!=0) cout << t50<< " to menh gia 50" << endl;
if (t20!=0) cout << t20<< " to menh gia 20" << endl;
if (t10!=0) cout << t10<< " to menh gia 10" << endl;
if (t5!=0) cout << t5<< " to menh gia 5" << endl;
if (t2!=0) cout << t2<< " to menh gia 2" << endl;
if (t1!=0) cout << t50<< " to menh gia 1" << endl;
return 0;
}
#include <bits/stdc++.h>
using namespace std;
long long a,b;
int main()
{
cin>>a>>b;
cout<<a*b;
return 0;
}
#include <iostream>
using namespace std;
int main() {
float sd, td;
int muc1 = 1000, muc2 = 1500, muc3 = 2000;
cin >> sd;
if (sd <= 50) {
td = sd * muc1;
} else if (sd <= 100) {
td = 50 * muc1 + (sd - 50) * muc2;
} else {
td = 50 * muc1 + 50 * muc2 + (sd - 100) * muc3;
}
cout << td;
return 0;
}
#include <bits/stdc++.h>
using namespace std;
long long n;
int main()
{
freopen("fibonacci.inp","r",stdin);
freopen("fibonacci.out","w",stdout);
cin>>n;
double c5=sqrt(5);
cout<<fixed<<setprecision(0)<<((1/c5)*(pow((1+c5)/2,n)-pow((1-c5)/2,n)));
return 0;
}