题解

#include<iostream>
using namespace std;
int main(){
    cout<<"                                1"<<endl;
    cout<<"                             1     1"<<endl;
    cout<<"                          1     2     1"<<endl;
    cout<<"                       1     3     3     1"<<endl;
    cout<<"                    1     4     6     4     1"<<endl;
    cout<<"                 1     5    10    10     5     1"<<endl;
    cout<<"              1     6    15    20    15     6     1"<<endl;
    cout<<"           1     7    21    35    35    21     7     1"<<endl;
    cout<<"        1     8    28    56    70    56    28     8     1"<<endl;
    cout<<"     1     9    36    84   126   126    84    36     9     1";
	return 0;
}

print("                                1")
print("                             1     1")
print("                          1     2     1")
print("                       1     3     3     1")
print("                    1     4     6     4     1")
print("                 1     5    10    10     5     1")
print("              1     6    15    20    15     6     1")
print("           1     7    21    35    35    21     7     1")
print("        1     8    28    56    70    56    28     8     1")
print("     1     9    36    84   126   126    84    36     9     1")