备战NOIP——模板复习4
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2022-03-23 10:54:31
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目录
这里只有模板,并不作讲解,仅为路过的各位做一个参考以及用做自己复习的资料,转载注明出处。
快速幂模板
快速幂(矩阵同理)
/*Copyright: Copyright (c) 2018
*Created on 2018-10-29
*Author: 十甫
*Version 1.0
*Title: int快速幂
*Time: 1.5 mins
*/
#include<iostream>
#include<cstdio>
using namespace std;
inline int mul(int a, int b) {
int res = 1;
while(b) {
if(b & 1) res *= a;
a *= a;
b /= 2;
}
return res;
}
int main() {
int n;
scanf("%d", &n);
while(n--) {
int a, b;
scanf("%d%d", &a, &b);
printf("%d\n", mul(a, b));
}
return 0;
}
快速乘(防止乘法溢出)
/*Copyright: Copyright (c) 2018
*Created on 2018-10-29
*Author: 十甫
*Version 1.0
*Title: 取模快速乘
*Time: 2.5 mins
*/
#include<iostream>
#include<cstdio>
using namespace std;
inline int Add(int a, int b, int p) {
int res = 0;
while(b) {
if(b & 1) res = ((res % p) + (a % p)) % p;
a = ((a % p) + (a % p)) % p;
b /= 2;
}
return res;
}
int main() {
int n;
scanf("%d", &n);
while(n--) {
int a, b, p;
scanf("%d%d%d", &a, &b, &p);
printf("%d\n", Add(a, b, p));
}
return 0;
}