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#include <iostream>#include <stdio.h>#include <stdlib.h>#include <string.h>#include <algorithm>#include <vector>#include <map>#include <queue>#include <math.h>#include <queue>#include <stack>using namespace std;#define INF 0x3f3f3f#define pi acos(-1.0)#define LL long longLL exgcd(LL a,LL b,LL &x,LL &y){    if(b==0)    {        x=1;        y=0;        return a;    }    LL ans=exgcd(b,a%b,x,y);    LL temp=x;    x=y;    y=temp-a/b*y;    return ans;}int main(){    LL v1,v2;    LL m;    LL s1,s2;    LL a,b,x,y,v,c;    scanf("%lld%lld%lld%lld%lld",&s1,&s2,&v1,&v2,&m);    c=s2-s1;    a=v1-v2;//-1    b=m;    //6    if(a<0)        a+=m;    LL d;    d=exgcd(a,b,x,y);    if(c%d||s1==s2)    {        printf("-1\n");        return 0;    }    a=a/d;    b=b/d;    c=c/d;    //printf("%lld\n",c);    x=x*c%b;    while(x<0)        x+=b;    printf("%lld\n",x);    return 0;}

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