點選檢視:藍橋杯曆年真題 題解目錄
煤球數目
![](https://img.laitimes.com/img/9ZDMuAjOiMmIsIjOiQnIsICM38FdsYkRGZkRG9lcvx2bjxiNx8VZ6l2cs0TPB1UerpnT3VEROBDOsJGcohVYsR2MMBjVtJWd0ckW65UbM5WOHJWa5kHT20ESjBjUIF2X0hXZ0xCMx81dvRWYoNHLrdEZwZ1Rh5WNXp1bwNjW1ZUba9VZwlHdssmch1mclRXY39CXldWYtlWPzNXZj9mcw1ycz9WL49zZuBnL4gTMxADNxEjM4EjMwAjMwIzLc52YucWbp5GZzNmLn9Gbi1yZtl2Lc9CX6MHc0RHaiojIsJye.png)
根據題目找出規律即可
public class Main001_煤球數目 {
public static void main(String[] args) {
int[] a = new int[100];
a[0]=1;
int t =2,sum = 1;;
for(int i=1;i<100;i++) {
a[i]=a[i-1]+t++;
sum+=a[i];
}
System.out.println(sum);
}
}