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;
}