day 38

2824.统计和小于目标的下标对数目

int countPairs(int* nums, int numsSize, int target){
    int x=0;
    for(int i=0;i<numsSize;i++){
        for(int j=i+1;j<numsSize;j++){
            if(nums[i]+nums[j]<target){
                x++;
            }
        }
    }
    return x;
}

2951.找出峰值

int* findPeaks(int* mountain, int mountainSize, int* returnSize) {
    int *ans=(int *)malloc(sizeof(int)*100);
    int t=0;
    for(int i=1;i<mountainSize-1;i++){
        if(mountain[i]>mountain[i-1]&&mountain[i]>mountain[i+1]){
            ans[t++]=i;
        }
    }
    *returnSize=t;
    return ans;
}