题目
C代码
int jump(int* nums, int numsSize) {
int i = 0;
int j = 0;
int last_i = 0;
int last_can = 0;
int max_i = 0;
int max_can = 0;
int min_jump = 0;
if (numsSize < 2) {
//注意点1:数组小于两个的时候,只需要跳转0次;
goto end;
}
// 注意点2: 当数组数量大于1个的时候,最小跳才是1;因为都是从nums[0]开始跳;
min_jump++;
last_can = nums[last_i] + last_i;
max_can = nums[max_i] + max_i;
for (i = 1; i < numsSize; i++) {
if ((last_i + nums[last_i]) < i) {
min_jump++;
last_i = max_i;
last_can = max_can;
} else {
//nothing to do
}
// 注意点3: 需要完成跳动后,再把最后这个值更新进系统,因为如果当前这个为最后的值;
if ((nums[i] + i) < max_can) {
//nothing to do
} else {
max_can = nums[i] + i;
max_i = i;
}
}
end:
return min_jump;
}