delete pics to save space

history_source/信息学奥赛一本通/2.7.14.cpp

@@ -0,0 +1,39 @@
+#include<cstdio>
+#include<algorithm>
+using namespace std;
+int L,N,M,D[50005],l=1<<30,r,mid;
+bool solve(int x)
+{
+	int last=0,cnt=0;
+	for(int i=1;i<=N+1;i++)
+	{
+		if(D[i]-last<x) cnt++;
+		else last=D[i];
+	}
+	if(cnt>M) return 0;
+	return 1;
+}
+int main()
+{
+	scanf("%d%d%d",&L,&N,&M);
+	for(int i=1;i<=N;i++)
+		scanf("%d",D+i);
+	D[N+1]=L;
+	l=0,r=L;
+	while(l<=r)
+	{
+		mid=(l+r)>>1;
+		if(solve(mid)) l=mid+1;
+		else r=mid-1;
+	}
+	printf("%d\n",l-1);
+	return 0;
+}
+/*
+25 5 2
+2
+11
+14
+17
+21
+*/