2022-08-17 10:22:11 +08:00
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#include <iostream>
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#include<cstdio>
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#include<algorithm>
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#include <cmath>
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#include <cstdlib>
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using namespace std;
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2022-08-17 11:44:41 +08:00
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long long exgcd(long long a,long long b,long long &x,long long &y)
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{
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if(b==0)
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{
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//x,yû<79><C3BB><EFBFBD><EFBFBD>ֵ
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x=1;
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y=0;
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return a;
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}
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long long ret=exgcd(b,a%b,x,y);
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long long tmp=x;
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x=y;
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y=tmp-a/b*y;
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return ret;
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}
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2022-08-17 10:22:11 +08:00
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int main()
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{
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2022-08-17 11:44:41 +08:00
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long long x,y,m,n,l;
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scanf("%lld%lld%lld%lld%lld",&x,&y,&m,&n,&l);//%lldû<64><C3BB>
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long long a=m-n,b=l,c=y-x;
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if(a<0)//<2F><>ֵû<D6B5><C3BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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{
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a*=-1;
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c*=-1;
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}
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long long x0,y0;
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long long g=exgcd(a,b,x0,y0);
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if(c%g!=0)printf("Impossible");//WA <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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else printf("%lld",(c/g*x0%(b/g)+b/g)%(b/g));//<2F><>ֵû<D6B5><C3BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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2022-08-17 10:22:11 +08:00
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return 0;
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}
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