题目：

题解：

int cmp(void* _a, void* _b) {int *a = *(int**)_a, *b = *(int**)_b;return a[1] < b[1] ? -1 : 1;
}int findMinArrowShots(int** points, int pointsSize, int* pointsColSize) {if (!pointsSize) {return 0;}qsort(points, pointsSize, sizeof(int*), cmp);int pos = points[0][1];int ans = 1;for (int i = 0; i < pointsSize; ++i) {if (points[i][0] > pos) {pos = points[i][1];++ans;}}return ans;
}