#include<stdio.h>

int main () {

int n; long long a[50000] = {0},b[50000] = {0};

a[1] = 1; b[1] = 1;

while(scanf("%d",&n)  != EOF){

for(int i = 1; i <= n; i++) {

if(i == 1) {

a[i] = 1,b[i] = 1;

} else {

a[i] = 0,b[i] =0;

}

if(n == 1) {

printf("%lli %lli\n",a[n],b[n]);

break;

}

for(int j = 1; j <= i; j++) {

a[i] += j;

}

if(i > 1) {

b[i] = a[i] + b[i-1];

}

}

if(n != 1)

printf("%lli %lli\n",a[n],b[n]);

}

return 0;

}

使用long long 注意印出是用%lli 

注意n=1時直接印出

a[i]就是1+2+3+4....i