Add 209 in c language

c/209-minimum-size-subarray-sum.c

@@ -0,0 +1,32 @@
+/*
+Given an array of positive integers nums and a positive integer target, return 
+the minimal length of a contiguous subarray of which the sum is greater than or 
+equal to target
+
+Space: O(1)
+Time: O(n)
+*/
+
+int min(int a, int b) {
+ return a<b?a:b;
+}
+
+int minSubArrayLen(int target, int* nums, int numsSize){
+ int len=0;
+ int i=0, j=0;
+ int cpt=0;
+ while (j<numsSize) {
+ cpt += nums[j];
+ if (cpt>=target) {
+ if (len==0)
+ len = j-i+1;
+ while (cpt-nums[i] >= target) {
+ cpt -= nums[i];
+ len = min(len, j-i);
+ i++;
+ }
+ }
+ j++;
+ }
+ return len;
+}