Luogu P2613 【模板】有理数取余

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真心没啥东西,只要能(Get)到在数字输入的时候按位取模,以及除数也可以直接取模就可以了。(把每个数看做乘法原理和加法原理构造起来的即可。)

#include <bits/stdc++.h>
using namespace std;

const int Mod = 19260817;

int read_Mod () {
	int s = 0, ch = getchar ();
	while ('9' < ch || ch < '0') {
		ch = getchar ();
	}
	while ('0' <= ch && ch <= '9') {
		s = (s * 10 + ch - '0') % Mod;
		ch = getchar ();
	}
	return s;
}

int fpow (int x, int y) {
	int res = 1;
	while (y) {
		if (y & 1) {
			res = 1LL * res * x % Mod;
		}
		x = 1LL * x * x % Mod;
		y >>= 1;
	}
	return res;
}

int main () {
	int a = read_Mod (), b = read_Mod ();
	if (b == 0) cout << "Angry!" << endl;
	else cout << (1LL * a * fpow (b, Mod - 2)) % Mod << endl; 
} 

原文地址:https://www.cnblogs.com/maomao9173/p/10490784.html