题目

题目链接：https://www.luogu.com.cn/problem/P1516

思路

好麻烦啊不想写呜呜呜数论怎么这么麻烦

代码

#include<cstdio>
#include<cstring>
#include<cmath>
#include<cstdlib>
#include<cctype>
#include<ctime>
#include<iostream>
#include<string>
#include<map>
#include<queue>
#include<stack>
#include<set>
#include<vector>
#include<iomanip>
#include<list>
#include<bitset>
#include<sstream>
#include<fstream>
#include<complex>
#include<algorithm>
#if __cplusplus >= 201103L
#include <unordered_map>
#include <unordered_set>
#endif
#define ll long long
#define int long long
using namespace std;
const int INF = 0x3f3f3f3f;
int exgcd(int a,int b,int &x1,int &y1){
	if(b==0){
		x1=1;
		y1=0;
		return a;
	}
	int g=exgcd(b,a%b,x1,y1);
	int temp=x1;
	x1=y1;
	y1=temp-(a/b)*y1;
	return g;	
}
signed main(){
	ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
	int x,y,n,m,l;
	cin>>x>>y>>n>>m>>l;
	int a=x-y,b=m-n;
	if(b<0){
		a=-a;
		b=-b;
	}
	int x1=0,x2=0;
	int gcd=exgcd(b,l,x1,x2);
//	cout<<gcd<<endl;
	if(a%gcd!=0) cout<<"Impossible"<<endl;
	else cout<<((x1*(a/gcd))%(l/gcd)+(l/gcd))%(l/gcd)<<endl;
    return 0;
}

本文地址：https://blog.csdn.net/kosf_/article/details/107397118