#include<iostream>
#include<stdio.h>
#include<cmath>
using namespace std;
long long int gcd(long long int a,long long int b,long long int &x,long long int &y){
    if (b==0){
        x=1,y=0;
        return a;
    }
    int q=gcd(b,a%b,y,x);
    y-=a/b*x;
    return q;
}
int main()
{
    long long int x,y,m,n,l;
    while(scanf("%I64d%I64d%I64d%I64d%I64d",&x,&y,&m,&n,&l)!=EOF)
    {
        long long int a=(n-m),c=(x-y),x0,y0;
        long long int g=gcd(a,l,x0,y0);
        if(n==m||c%g!=0)
        {
          cout<<"Impossible"<<endl;
        }else
        {
            x0=x0*(c/g);
            int b=l/g;
            x0=(x0%b+b)%b;
            cout<<x0<<endl;
        }
    }
    return 0;
}


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• Re:这组数据输出 -1 都过了，，，，，，，，，，无语 (13) megadeth_ 2019-10-31 17:24:28
• Re:这组数据输出 -1 都过了，，，，，，，，，，无语 (831) q1739281899 2021-09-22 11:35:28