'commit'

TangDou/LanQiaoBei/LanQiaoBei13ShengSai_ZJ_I/pinmingxuexi.cpp

@@ -0,0 +1,34 @@
+#include <bits/stdc++.h>
+using namespace std;
+const int N = 100010;
+int a[N], b[N];
+int al, bl;
+
+void sub(int a[], int &al, int b[], int &bl) {
+	int t = 0;
+	al = max(al, bl);
+	for (int i = 0; i < al; i++) {
+		t = a[i] - b[i] - t;
+		a[i] = (t + 10) % 10;
+		t < 0 ? t = 1 : t = 0;
+	}
+	while (al > 0 && a[al] == 0)
+		al--;
+}
+
+int main() {
+	string x, y;
+	cin >> x >> y;
+	if (x.size() < y.size() || (x.size() == y.size() && x < y)) {
+		printf("-");
+		swap(x, y);
+	}
+	for (int i = x.size() - 1; i >= 0; i--)
+		a[al++] = x[i] - '0';
+	for (int i = y.size() - 1; i >= 0; i--)
+		b[bl++] = y[i] - '0';
+	sub(a, al, b, bl);
+	for (int i = al; i >= 0; i--)
+		printf("%d", a[i]);
+	return 0;
+}