diff --git a/S2OJ/1454/1454.cpp b/S2OJ/1454/1454.cpp
new file mode 100644
index 00000000..0c1ded94
--- /dev/null
+++ b/S2OJ/1454/1454.cpp
@@ -0,0 +1,85 @@
+#include <iostream>
+#include <vector>
+
+using std::cin;
+using std::cout;
+const char endl = '\n';
+
+const int N = 1e5 + 5;
+const int mod = 1e9 + 7;
+
+int n, m, q, p[N], s[N], c[N], ans[N];
+std::vector<int> g[N];
+std::vector<std::pair<int, int>> qs[N];
+
+int binpow(int a, int b) {
+    int res = 1;
+    a %= mod;
+
+    while (b) {
+        if (b & 1) res = static_cast<long long>(res) * a % mod;
+        a = static_cast<long long>(a) * a % mod;
+        b >>= 1;
+    }
+
+    return res;
+}
+
+inline int lowbit(int x) {
+    return x & -x;
+}
+
+void add(int x, int y) {
+    for (; x; x -= lowbit(x)) c[x] = (c[x] + y) % mod;
+}
+
+int sum(int x) {
+    int res = 0;
+    for (; x <= n; x += lowbit(x)) res = (res + c[x]) % mod;
+    return res;
+}
+
+int main() {
+    std::ios::sync_with_stdio(false);
+    cin.tie(nullptr);
+
+    cin >> n >> m >> q;
+
+    for (int i = 1, a, b; i <= n; i++) {
+        cin >> a >> b;
+
+        p[i] = static_cast<long long>(a) * binpow(b, mod - 2) % mod;
+        s[i] = (s[i - 1] + p[i]) % mod;
+    }
+
+    for (int i = 1, u, v; i <= m; i++) {
+        cin >> u >> v;
+
+        if (u > v) std::swap(u, v);
+
+        g[v].push_back(u);
+    }
+
+    for (int i = 1, l, r; i <= q; i++) {
+        cin >> l >> r;
+
+        ans[i] = (s[r] - s[l - 1]) % mod;
+        qs[r].emplace_back(i, l);
+    }
+
+    for (int i = 1; i <= n; i++) {
+        for (int v : g[i]) {
+            add(v, static_cast<long long>(p[i]) * p[v] % mod);
+        }
+
+        for (auto t : qs[i]) {
+            ans[t.first] = (ans[t.first] - sum(t.second)) % mod;
+        }
+    }
+
+    for (int i = 1; i <= q; i++) {
+        cout << (static_cast<long long>(ans[i]) % mod + mod) % mod << endl;
+    }
+
+    return 0;
+}
diff --git a/S2OJ/1454/data/data1.in b/S2OJ/1454/data/data1.in
new file mode 100644
index 00000000..abe49d5b
--- /dev/null
+++ b/S2OJ/1454/data/data1.in
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:7a30217d09353f3a8fb0771b40d86d7349793cfce52c129be08830fa22b0a18f
+size 227
diff --git a/S2OJ/1454/data/data1.out b/S2OJ/1454/data/data1.out
new file mode 100644
index 00000000..53a47839
--- /dev/null
+++ b/S2OJ/1454/data/data1.out
@@ -0,0 +1,3 @@
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diff --git a/S2OJ/1454/data/data10.in b/S2OJ/1454/data/data10.in
new file mode 100644
index 00000000..8b42f303
--- /dev/null
+++ b/S2OJ/1454/data/data10.in
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
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diff --git a/S2OJ/1454/data/data10.out b/S2OJ/1454/data/data10.out
new file mode 100644
index 00000000..60d42b67
--- /dev/null
+++ b/S2OJ/1454/data/data10.out
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diff --git a/S2OJ/1454/data/data2.in b/S2OJ/1454/data/data2.in
new file mode 100644
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--- /dev/null
+++ b/S2OJ/1454/data/data2.in
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+version https://git-lfs.github.com/spec/v1
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diff --git a/S2OJ/1454/data/data2.out b/S2OJ/1454/data/data2.out
new file mode 100644
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diff --git a/S2OJ/1454/data/data3.in b/S2OJ/1454/data/data3.in
new file mode 100644
index 00000000..dd3d23cd
--- /dev/null
+++ b/S2OJ/1454/data/data3.in
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+version https://git-lfs.github.com/spec/v1
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new file mode 100644
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new file mode 100644
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new file mode 100644
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diff --git a/S2OJ/1454/data/data5.out b/S2OJ/1454/data/data5.out
new file mode 100644
index 00000000..3a309e79
--- /dev/null
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