题解

#include<string>
#include<iostream>
#include<cmath>
using namespace std;
int main(){
int a,c=1;
cin >> a;
int b[105][105];
b[1][1]={1};

for(int i=2;i<=a;i++){
b[i][1]=1;b[i][i]=1;
for(int j=2;j<=i-1;j++){
	b[i][j]=b[i-1][j-1]+b[i-1][j];
}

}
for(int i =1;i<=a;i++){
	for(int j=1;j<=i;j++){
		cout <<b[i][j]<<" ";
		
	}
	cout << endl;
}
return 0;  
}