CCF 201803-01（跳一跳）

 題目信息：參考鏈接

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
void jump(){
    int cur, pre, flag = 0, score = 0;
    while(scanf("%d", &cur), cur != 0){
        //第一個
        if(flag == 0){
            flag = 1;
            if(cur == 1){
                score = pre = 1;
            }
            else if(cur == 2){
                score = pre = 2;
            }
        }
      
        else{
            if(cur == 2){
                if(pre == 1){
                    score += 2;
                    pre = 2;
                }
                else{
                    score += pre + 2;
                    pre = pre + 2;
                }
            }
            else{
                score += 1;
                pre = 1;
            }
        }
    }
    printf("%d\n", score);
}
int main(){
jump();
return 0;
}