new file: P10466.cpp

P10466.cpp

@@ -0,0 +1,25 @@
+#include <bits/stdc++.h>
+using namespace std;
+set<int> s;
+map<int, int> rev;
+int n;
+int tmp;
+int main(void) {
+	scanf("%d%d", &n, &tmp), s.insert(tmp), rev[tmp] = 1;
+	for(int i = 2; i <= n; i++) {
+		scanf("%d", &tmp), s.insert(tmp), rev[tmp] = i;
+		auto lb = s.lower_bound(tmp), ub = s.upper_bound(tmp);
+		int minval = INT_MAX, ind = 0;
+		if(lb != s.begin()) {
+			--lb;
+			if(abs(tmp - *lb) < minval)
+				minval = abs(tmp - *lb), ind = rev[*lb];
+		}
+		if(ub != s.end())
+			if(abs(tmp - *ub) < minval)
+				minval = abs(tmp - *ub), ind = rev[*ub];
+		printf("%d %d\n", minval, ind);
+	}
+	
+	return 0;
+}