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HDOJ_2041_大二寫_超級電梯

AC程式碼:

#include <iostream>
#include <cstdio>
using namespace std;
int main(void)
{
    freopen("in.txt","r",stdin);
    int N;
    scanf("%d",&N);
    while(N--)
    {
        int m;
        long long sum,sum1,sum2;
        scanf("%d",&m);
        sum1=1;
        sum2=2;
        
if(m==1) sum=0; else if(m==2) sum=sum1; else if(m==3) sum=sum2; else for(int i=4;i<=m;i++) { sum=sum1+sum2; sum1=sum2; sum2=sum; } printf("%d\n",sum); } fclose(stdin);
return 0; }