HDU-2044

原题点击打开链接

#include<stdio.h>int main(void){int i,n,a,b;double f[51]={1,2};for(i=2;i<51;i++)f[i]=f[i-1]+f[i-2];scanf("%d",&n);while(n--){    scanf("%d%d",&a,&b);    printf("%.lf\n",f[b-a-1]);}return 0;}