'commit'

TangDou/AcWing_TiGao/T5/TongYu/POJ1006_CRT.cpp

@@ -0,0 +1,62 @@
+#include <cstdio>
+#include <iostream>
+using namespace std;
+#define endl "\r"
+#define int long long
+
+const int N = 10;
+
+int n = 3;
+int a[N] = {0, 23, 28, 33};
+int m[N];
+int A = 1;
+int x, y;
+int res;
+
+int exgcd(int a, int b, int &x, int &y) {
+    if (!b) {
+        x = 1, y = 0;
+        return a;
+    }
+    int d = exgcd(b, a % b, y, x);
+    y -= a / b * x;
+    return d;
+}
+
+int qmul(int a, int b, int mod) {
+    int res = 0;
+    while (b) {
+        if (b & 1) res = (res + a) % mod;
+        a = (a + a) % mod;
+        b >>= 1;
+    }
+    return res;
+}
+
+void CRT() {
+    for (int i = 1; i <= n; i++) {
+        m[i] = (m[i] % a[i] + a[i]) % a[i];
+        A *= a[i];
+    }
+
+    for (int i = 1; i <= n; i++) {
+        int Ai = A / a[i];
+        exgcd(Ai, a[i], x, y);
+        x = (x % a[i] + a[i]) % a[i];
+        res = (res + qmul(m[i], A / a[i] * x, A)) % A;
+    }
+}
+
+int T;
+int p, e, i, d;
+signed main() {
+    while (cin >> p >> e >> i >> d && ~p) {
+        T++;
+        A = 1;
+        res = 0;
+        m[1] = p, m[2] = e, m[3] = i;
+        CRT();
+        if (res <= d) res += A;
+        printf("Case %lld: the next triple peak occurs in %lld days.\n", T, res - d);
+    }
+}