'commit'

TangDou/AcWing_TiGao/T5/TongYu/1298.cpp

@@ -0,0 +1,35 @@
+#include <bits/stdc++.h>
+using namespace std;
+#define int long long
+#define endl "\n"
+const int N = 10;
+
+int n;
+int a[N], m[N];
+
+void exgcd(int a, int b, int &x, int &y) {
+    if (!b)
+        x = 1, y = 0;
+    else {
+        exgcd(b, a % b, y, x);
+        y -= a / b * x;
+    }
+}
+
+signed main() {
+    cin >> n;
+    int M = 1;
+
+    for (int i = 1; i <= n; i++) {
+        cin >> m[i] >> a[i];
+        M *= m[i];
+    }
+
+    int res = 0, x, y;
+    for (int i = 1; i <= n; i++) {
+        exgcd(M / m[i], m[i], x, y);
+        res += a[i] * M / m[i] * x;
+    }
+
+    cout << (res % M + M) % M << endl;
+}