OJ-Problems-Source/HDOJ/4938_autoAC.cpp

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#include<iostream>
#include<cstdio>
#include<algorithm>
#include<cstring>
#include<cmath>
#include<vector>
#include<queue>
#include<map>
#include<set>
#include<time.h>
#include<string>
#define REP(i,n) for(int i=0;i<n;++i)
#define REP1(i,a,b) for(int i=a;i<=b;++i)
#define REP2(i,a,b) for(int i=a;i>=b;--i)
#define MP make_pair
#define LL long long
#define X first
#define Y second
#define MAXN 100050
#define eps 1e-8
using namespace std;
struct Point {
double x, y;
} p1[MAXN], p2[MAXN];
struct Line {
Point p, q;
};
Point Intersect(Line u, Line v)
{
Point ret = u.p;
double t = ((u.p.x - v.p.x) * (v.p.y - v.q.y)
- (u.p.y - v.p.y) * (v.p.x - v.q.x))
/ ((u.p.x - u.q.x) * (v.p.y - v.q.y)
- (u.p.y - u.q.y) * (v.p.x - v.q.x));
ret.x += (u.q.x - u.p.x) * t;
ret.y += (u.q.y - u.p.y) * t;
return ret;
}
struct node {
double x, w;
int id, type;
} s[MAXN];
bool cmp1(node a, node b) {
return a.x < b.x - eps || (fabs(a.x - b.x) < eps && a.type < b.type);
}
bool cmp2(node a, node b) {
return a.x < b.x - eps || (fabs(a.x - b.x) < eps && a.type > b.type);
}
int d[MAXN];
int ans[MAXN];
int main() {
int tt, ri = 0, n;
scanf("%d", &tt);
while (tt--) {
Line L;
L.p.x = L.p.y = L.q.y = 0;
L.q.x = 100;
double v1, v2;
scanf("%d%lf%lf", &n, &v1, &v2);
double si = v1 / sqrt(v1 * v1 + v2 * v2);
REP(i,n)
{
double a, t, p, w;
scanf("%lf%lf%lf%lf", &a, &t, &p, &w);
Line L1;
if (a == 1) {
L1.p.x = 1.0*p;
L1.p.y = -1.0*t * v1;
L1.q.x = 1.0*p - v2;
L1.q.y = -1.0*t * v1 + v1;
} else {
L1.p.x = -1.0*t * v2;
L1.p.y = 1.0*p;
L1.q.x = -1.0*t * v2 - v2;
L1.q.y = 1.0*p + v1;
}
Point e = Intersect(L, L1);
s[i].x = e.x;
s[i].type = a;
if(a==1)
s[i].w = w ;
else
s[i].w=w*1.0*v2/v1;
s[i].id = i;
}
sort(s, s + n, cmp1);
d[n] = 0;
for (int i = n - 1; i >= 0; --i) {
d[i] = d[i + 1];
if (s[i].type == 2) {
d[i]++;
continue;
}
int l, r;
l = i;
r = n - 1;
while (r - l > 1) {
int mid = (l + r) >> 1;
if (s[mid].x - s[i].x > s[i].w + eps)
r = mid;
else
l = mid;
}
if (s[r].x - s[i].x < s[i].w + eps)
ans[s[i].id] = d[i]-d[r+1];
else
ans[s[i].id] = d[i] - d[r];
}
sort(s, s + n, cmp2);
d[n] = 0;
for (int i = n - 1; i >= 0; --i) {
d[i] = d[i + 1];
if (s[i].type == 1) {
d[i]++;
continue;
}
int l, r;
l = i;
r = n - 1;
while (r - l > 1) {
int mid = (l + r) >> 1;
if (s[mid].x - s[i].x > s[i].w + eps)
r = mid;
else
l = mid;
}
if (s[r].x - s[i].x < s[i].w + eps)
ans[s[i].id] = d[i]-d[r+1];
else
ans[s[i].id] = d[i] - d[r];
}
printf("Case #%d:\n",++ri);
for(int i=0;i<n;++i)
printf("%d\n",ans[i]);
}
return 0;
}