'commit'

TangDou/XiTi/1397.cpp

@@ -0,0 +1,30 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+int main() {
+    //输入+输出重定向
+    //freopen("../x.in", "r", stdin);
+    //freopen("../x.out", "w", stdout);
+    int n;
+    scanf("%d", &n);
+    unordered_map<int, int> _map;
+    for (int i = 1; i <= n; ++i) {
+        int c;
+        scanf("%d", &c);
+        _map[c] = i; //key:个数,value:位置
+    }
+    int q;
+    scanf("%d", &q);
+    for (int i = 0; i < q; ++i) {
+        int m;
+        scanf("%d", &m);
+        if (_map.count(m) > 0) printf("%d\n", _map[m]);
+        else printf("%d\n", 0);
+    }
+
+    //关闭文件
+    //fclose(stdin);
+    //fclose(stdout);
+    return 0;
+}