codeforces 452B 4-point polyline

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#include<cstdio>#include<cstring>#include<cmath>#include<climits>#include<cctype>#include<cstdlib>#include<iostream>#include<algorithm>#include<queue>#include<vector>#include<map>#include<set>#include<string>#include<stack>#define ll long long#define MAX 1000#define INF INT_MAX#define eps 1e-7using namespace std;int main(){int n,m;while (scanf("%d%d",&n,&m) != EOF){if (n == 0){printf("%d %d\n%d %d\n%d %d\n%d %d\n",0,1,0,m,0,0,0,m-1);}else if (m == 0){printf("%d %d\n%d %d\n%d %d\n%d %d\n",1,0,n,0,0,0,n-1,0);}else {double t1 = (double)(2*sqrt((double)((n-1)*(n-1) + m*m)) ) + eps;double t2 = (double)(2*sqrt((double)((m-1)*(m-1) + n*n)) ) + eps;double t3 = (double)(sqrt((double)(n*n+m*m)) + n ) + eps;double t4 = (double)(sqrt((double)(n*n+m*m)) + m ) + eps;//printf("%lf %lf %lf %lf\n",t1,t2,t3,t4);if (t1 >= t2 && t1 >= t3 && t1 >= t4){printf("%d %d\n%d %d\n%d %d\n%d %d\n",1,0,n,m,0,0,n-1,m);}else if (t2 >= t1 && t2 >= t3   && t2 >= t4 ){printf("%d %d\n%d %d\n%d %d\n%d %d\n",0,1,n,m,0,0,n,m-1);}else if (t3 >= t1  && t3 >= t2 && t3 >= t4 ){printf("%d %d\n%d %d\n%d %d\n%d %d\n",0,0,n,m,0,m,n,0);}else{printf("%d %d\n%d %d\n%d %d\n%d %d\n",0,0,n,m,n,0,0,m);}}}return 0;}

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