diff --git a/S2OJ/1446/1446.cpp b/S2OJ/1446/1446.cpp
new file mode 100644
index 00000000..60ddfe7b
--- /dev/null
+++ b/S2OJ/1446/1446.cpp
@@ -0,0 +1,94 @@
+#include <iostream>
+#include <cmath>
+#include <cstring>
+
+using std::cin;
+using std::cout;
+const char endl = '\n';
+
+const int N = 1e5 + 5;
+
+int n, c, t, a[N], st[N], ed[N], pos[N], rep[N];
+
+inline void pushdown(int x) {
+    if (rep[x] != -1) {
+        for (int i = st[x]; i <= ed[x]; i++) a[i] = rep[x];
+        rep[x] = -1;
+    }
+}
+
+int solve(int l, int r, int c) {
+    int p = pos[l],
+        q = pos[r];
+    int res = 0;
+
+    if (p == q) {
+        pushdown(p);
+        for (int i = l; i <= r; i++) {
+            if (a[i] == c) res++;
+            a[i] = c;
+        }
+
+        return res;
+    }
+
+    pushdown(p);
+    for (int i = l; i <= ed[p]; i++) {
+        if (a[i] == c) res++;
+        a[i] = c;
+    }
+
+    pushdown(q);
+    for (int i = st[q]; i <= r; i++) {
+        if (a[i] == c) res++;
+        a[i] = c;
+    }
+
+    for (int i = p + 1; i <= q - 1; i++) {
+        if (rep[i] != -1) {
+            if (rep[i] == c) res += ed[i] - st[i] + 1;
+        } else {
+            for (int j = st[i]; j <= ed[i]; j++) {
+                if (a[j] == c) res++;
+                a[j] = c;
+            }
+        }
+        rep[i] = c;
+    }
+
+    return res;
+}
+
+int main() {
+    std::ios::sync_with_stdio(false);
+
+    memset(rep, 0xff, sizeof(rep));
+
+    cin >> n;
+
+    for (int i = 1; i <= n; i++) {
+        cin >> a[i];
+    }
+
+    t = std::sqrt(n);
+
+    for (c = 1;; c++) {
+        st[c] = (c - 1) * t + 1;
+        ed[c] = std::min(n, c * t);
+
+        if (c * t >= n) break;
+    }
+
+    for (int i = 1; i <= c; i++) {
+        for (int j = st[i]; j <= ed[i]; j++) {
+            pos[j] = i;
+        }
+    }
+
+    for (int i = 1, l, r, c; i <= n; i++) {
+        cin >> l >> r >> c;
+        cout << solve(l, r, c) << endl;
+    }
+
+    return 0;
+}
diff --git a/S2OJ/1446/data/a1.in b/S2OJ/1446/data/a1.in
new file mode 100644
index 00000000..69e5187e
--- /dev/null
+++ b/S2OJ/1446/data/a1.in
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:50b6049d9e7f4598daa87487d00d4ce50b17892e2f50fcabe0dd1969a826194e
+size 157818
diff --git a/S2OJ/1446/data/a1.out b/S2OJ/1446/data/a1.out
new file mode 100644
index 00000000..4fd3885d
--- /dev/null
+++ b/S2OJ/1446/data/a1.out
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:16c19a30543215918faa48c02216c7d7755fabf1f4762766feb5a54dfe9295a6
+size 12515
diff --git a/S2OJ/1446/data/a10.in b/S2OJ/1446/data/a10.in
new file mode 100644
index 00000000..8131351a
--- /dev/null
+++ b/S2OJ/1446/data/a10.in
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e110af7fdfd9bceefb4e1c7a0ecace4eda4783c2fa867abc3e63b436a5b5c248
+size 3377820
diff --git a/S2OJ/1446/data/a10.out b/S2OJ/1446/data/a10.out
new file mode 100644
index 00000000..daec74ae
--- /dev/null
+++ b/S2OJ/1446/data/a10.out
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:ceec1d2daea3255818c0351228c8268a7473406f4ee26839bb027657d0736d04
+size 280797
diff --git a/S2OJ/1446/data/a2.in b/S2OJ/1446/data/a2.in
new file mode 100644
index 00000000..69e5187e
--- /dev/null
+++ b/S2OJ/1446/data/a2.in
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:50b6049d9e7f4598daa87487d00d4ce50b17892e2f50fcabe0dd1969a826194e
+size 157818
diff --git a/S2OJ/1446/data/a2.out b/S2OJ/1446/data/a2.out
new file mode 100644
index 00000000..4fd3885d
--- /dev/null
+++ b/S2OJ/1446/data/a2.out
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:16c19a30543215918faa48c02216c7d7755fabf1f4762766feb5a54dfe9295a6
+size 12515
diff --git a/S2OJ/1446/data/a3.in b/S2OJ/1446/data/a3.in
new file mode 100644
index 00000000..69e5187e
--- /dev/null
+++ b/S2OJ/1446/data/a3.in
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:50b6049d9e7f4598daa87487d00d4ce50b17892e2f50fcabe0dd1969a826194e
+size 157818
diff --git a/S2OJ/1446/data/a3.out b/S2OJ/1446/data/a3.out
new file mode 100644
index 00000000..4fd3885d
--- /dev/null
+++ b/S2OJ/1446/data/a3.out
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:16c19a30543215918faa48c02216c7d7755fabf1f4762766feb5a54dfe9295a6
+size 12515
diff --git a/S2OJ/1446/data/a4.in b/S2OJ/1446/data/a4.in
new file mode 100644
index 00000000..aa867795
--- /dev/null
+++ b/S2OJ/1446/data/a4.in
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:0117ccc558449674f7f9ca7c5c449ac8a5d3fa5637ef4c8a9d3cf03386d340b6
+size 3378066
diff --git a/S2OJ/1446/data/a4.out b/S2OJ/1446/data/a4.out
new file mode 100644
index 00000000..d0e4a876
--- /dev/null
+++ b/S2OJ/1446/data/a4.out
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:5a3bb861df15ebc679538e51b45be68d1dd26d20c9b390e4718d55d093555c5c
+size 280935
diff --git a/S2OJ/1446/data/a5.in b/S2OJ/1446/data/a5.in
new file mode 100644
index 00000000..aa867795
--- /dev/null
+++ b/S2OJ/1446/data/a5.in
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:0117ccc558449674f7f9ca7c5c449ac8a5d3fa5637ef4c8a9d3cf03386d340b6
+size 3378066
diff --git a/S2OJ/1446/data/a5.out b/S2OJ/1446/data/a5.out
new file mode 100644
index 00000000..d0e4a876
--- /dev/null
+++ b/S2OJ/1446/data/a5.out
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:5a3bb861df15ebc679538e51b45be68d1dd26d20c9b390e4718d55d093555c5c
+size 280935
diff --git a/S2OJ/1446/data/a6.in b/S2OJ/1446/data/a6.in
new file mode 100644
index 00000000..1a4e6c2a
--- /dev/null
+++ b/S2OJ/1446/data/a6.in
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:ec4340c03c79aafdab34eb79c1bef3cc1f56451a77cb6042c8bdb0981a9c54d2
+size 3377474
diff --git a/S2OJ/1446/data/a6.out b/S2OJ/1446/data/a6.out
new file mode 100644
index 00000000..856b3a92
--- /dev/null
+++ b/S2OJ/1446/data/a6.out
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:91b4bc927d9707d03b87f697fb674362d81c1c3d23ed3149956d46c2c128f733
+size 281005
diff --git a/S2OJ/1446/data/a7.in b/S2OJ/1446/data/a7.in
new file mode 100644
index 00000000..1a4e6c2a
--- /dev/null
+++ b/S2OJ/1446/data/a7.in
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:ec4340c03c79aafdab34eb79c1bef3cc1f56451a77cb6042c8bdb0981a9c54d2
+size 3377474
diff --git a/S2OJ/1446/data/a7.out b/S2OJ/1446/data/a7.out
new file mode 100644
index 00000000..856b3a92
--- /dev/null
+++ b/S2OJ/1446/data/a7.out
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:91b4bc927d9707d03b87f697fb674362d81c1c3d23ed3149956d46c2c128f733
+size 281005
diff --git a/S2OJ/1446/data/a8.in b/S2OJ/1446/data/a8.in
new file mode 100644
index 00000000..96c168a8
--- /dev/null
+++ b/S2OJ/1446/data/a8.in
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:8866ea254b339a86feeccfead24b36468af40e6d10349fb7ef80416523dca9be
+size 3377827
diff --git a/S2OJ/1446/data/a8.out b/S2OJ/1446/data/a8.out
new file mode 100644
index 00000000..64b2125d
--- /dev/null
+++ b/S2OJ/1446/data/a8.out
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:123792996fc648d0c0305bd77fc1fdc33ada16bffa0c57f0312f80bb80d76d40
+size 281258
diff --git a/S2OJ/1446/data/a9.in b/S2OJ/1446/data/a9.in
new file mode 100644
index 00000000..96c168a8
--- /dev/null
+++ b/S2OJ/1446/data/a9.in
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:8866ea254b339a86feeccfead24b36468af40e6d10349fb7ef80416523dca9be
+size 3377827
diff --git a/S2OJ/1446/data/a9.out b/S2OJ/1446/data/a9.out
new file mode 100644
index 00000000..64b2125d
--- /dev/null
+++ b/S2OJ/1446/data/a9.out
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:123792996fc648d0c0305bd77fc1fdc33ada16bffa0c57f0312f80bb80d76d40
+size 281258