delete pics to save space

2.11991.cpp

@@ -0,0 +1,28 @@
+#include<cstdio>
+#include<vector>
+#include<map>
+using namespace std;
+map<int,vector<int>> mp;
+int n,m,x,y;
+int main()
+{
+#ifdef local
+	freopen("pro.in","r",stdin);
+#endif
+	while(scanf("%d%d",&n,&m)==2)
+	{
+		mp.clear();
+		for(int i=0;i<n;i++)
+		{
+			scanf("%d",&x);
+			mp[x].push_back(i+1);
+		}
+		while(m--)
+		{
+			scanf("%d%d",&x,&y);
+			if(!mp.count(y)||mp[y].size()<x) printf("0\n");
+			else printf("%d\n",mp[y][x-1]);
+		}
+	}
+	return 0;
+}