4 files changed, 42 insertions, 0 deletions
diff --git a/yapapsai/main b/yapapsai/main
new file mode 100755
index 0000000..a26e653
--- /dev/null
+++ b/yapapsai/main
diff --git a/yapapsai/main.cpp b/yapapsai/main.cpp
new file mode 100644
index 0000000..2946e65
--- /dev/null
+++ b/yapapsai/main.cpp
@@ -0,0 +1,26 @@
+#include<bits/stdc++.h>
+
+using namespace std;
+
+int main () {
+	ios_base::sync_with_stdio(false);
+	cin.tie(NULL);
+	int tt;
+	cin >> tt;
+	while(tt--){
+    int n;
+    cin >> n;
+    vector<int> pos;
+    long long ans = 0;
+    for (int i = 1; i <= n; i++) {
+      int x;
+      cin >> x;
+      if (x < i) {
+        auto it = lower_bound(pos.begin(), pos.end(), x);
+        ans += it - pos.begin();
+        pos.emplace_back(i);
+      }
+    }
+    cout << ans << '\n';
+	}
+}
diff --git a/yapapsai/main_input0.txt b/yapapsai/main_input0.txt
new file mode 100644
index 0000000..bb1b141
--- /dev/null
+++ b/yapapsai/main_input0.txt
@@ -0,0 +1,11 @@
+5
+8
+1 1 2 3 8 2 1 4
+2
+1 2
+10
+0 2 1 6 3 4 1 2 8 3
+2
+1 1000000000
+3
+0 1000000000 2
diff --git a/yapapsai/main_output0.txt b/yapapsai/main_output0.txt
new file mode 100644
index 0000000..5859aa7
--- /dev/null
+++ b/yapapsai/main_output0.txt
@@ -0,0 +1,5 @@
+3
+0
+10
+0
+1