delete pics to save space

1.2434.cpp

@@ -0,0 +1,25 @@
+#include<cstdio>
+#include<algorithm>
+using namespace std;
+const int maxv=2000005;
+int n,d[maxv],L,R,st,v,maxR;
+int main()
+{
+#ifdef local
+	freopen("pro.in","r",stdin);
+#endif
+	scanf("%d",&n);
+	for(int i=0;i<n;i++)
+	{
+		scanf("%d%d",&L,&R);
+		d[L*2-1]++; d[R*2]--;
+		maxR=max(maxR,R*2);
+	}
+	for(int i=1;i<=maxR;i++)
+	{
+		v+=d[i];
+		if(v&&st==0) { L=i; st=1; }
+		if(!v&&st==1) { printf("%d %d\n",(L+1)/2,i/2); st=0; }
+	}
+	return 0;
+}