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Submission #369351

# Submission time Handle Problem Language Result Execution time Memory
369351 2021-02-21T12:02:08 Z denkendoemeer Dragon 2 (JOI17_dragon2) C++14
100 / 100
 1612 ms 11208 KB 
#include<bits/stdc++.h>
#define ll long long
using namespace std;
struct pct
{
    int x,y,c;
    int u1,u2;
}v[30005],s,e;
ll cross(pct a,pct b,pct c)
{
    return 1LL*(b.x-a.x)*(c.y-a.y)-1LL*(c.x-a.x)*(b.y-a.y);
}
int stx[30005],sty[30005],edx[30005],edy[30005],n,m;
bool cmp(pct a,pct b)
{
    bool ok1,ok2;
    ok1=cross(s,e,a)>0;
    ok2=cross(s,e,b)>0;
    if (ok1!=ok2)
        return ok1>ok2;
    return cross(s,a,b)>0;
}
bool cmp2(pct a,pct b)
{
    bool ok1,ok2;
    ok1=cross(s,e,a)>0;
    ok2=cross(s,e,b)>0;
    if (ok1!=ok2)
        return ok1>ok2;
    return cross(e,a,b)>0;
}
void calc1()
{
    sort(v,v+n,cmp);
    int mini=0,i;
    for(i=0;i<n;i++){
        v[i].u1=i;
        if (cross(s,e,v[i])>0)
            mini=i+1;
    }
    int u=0;
    for(i=mini;i<n;i++){
        while(u<mini && cross(s,v[i],v[u])>0)
            u++;
        stx[i]=i;
        edx[i]=u;
    }
    u=mini;
    for(i=0;i<mini;i++){
        while(u<n && cross(s,v[i],v[u])>0)
            u++;
        stx[i]=u;
        edx[i]=i;
    }
}
void calc2()
{
    sort(v,v+n,cmp2);
    int mini=0,i;
    for(i=0;i<n;i++){
        v[i].u2=i;
        if (cross(s,e,v[i])>0)
            mini=i+1;
    }
    int u=0;
    for(i=mini;i<n;i++){
        while(u<mini && cross(e,v[i],v[u])>0)
            u++;
        sty[i]=u;
        edy[i]=i;
    }
    u=mini;
    for(i=0;i<mini;i++){
        while(u<n && cross(e,v[i],v[u])>0)
            u++;
        sty[i]=i;
        edy[i]=u;
    }
}
vector<pair<int,int>>g[30005];
map<pair<int,int>,int>mp;
int calc(int x,int y)
{
    if (mp.find(make_pair(x,y))!=mp.end())
        return mp[make_pair(x,y)];
    int ans=0;
    for(auto it:g[x])
        for(auto it2:g[y]){
            bool ok1=0,ok2=0;
            if (!(edx[it.first]<=it2.first && it2.first<stx[it.first]))
                ok1=1;
            if (sty[it.second]<=it2.second && it2.second<edy[it.second])
                ok2=1;
            if (ok1 && ok2)
                ans++;
        }
    mp[make_pair(x,y)]=ans;
    return ans;
}
int main()
{
    //freopen(".in","r",stdin);
    //freopen(".out","w",stdout);
    int q,i;
    scanf("%d%d",&n,&m);
    for(i=0;i<n;i++)
        scanf("%d%d%d",&v[i].x,&v[i].y,&v[i].c);
    scanf("%d%d%d%d",&s.x,&s.y,&e.x,&e.y);
    calc1();
    calc2();
    for(i=0;i<n;i++)
        g[v[i].c].push_back(make_pair(v[i].u1,v[i].u2));
    scanf("%d",&q);
    int x,y;
    for(i=1;i<=q;i++){
        scanf("%d%d",&x,&y);
        printf("%d\n",calc(x,y));
    }
return 0;
}

Compilation message

dragon2.cpp: In function 'int main()':
dragon2.cpp:105:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  105 |     scanf("%d%d",&n,&m);
      |     ~~~~~^~~~~~~~~~~~~~
dragon2.cpp:107:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  107 |         scanf("%d%d%d",&v[i].x,&v[i].y,&v[i].c);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
dragon2.cpp:108:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  108 |     scanf("%d%d%d%d",&s.x,&s.y,&e.x,&e.y);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
dragon2.cpp:113:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  113 |     scanf("%d",&q);
      |     ~~~~~^~~~~~~~~
dragon2.cpp:116:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  116 |         scanf("%d%d",&x,&y);
      |         ~~~~~^~~~~~~~~~~~~~

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 1260 KB Output is correct
2 Correct 15 ms 1260 KB Output is correct
3 Correct 27 ms 1644 KB Output is correct
4 Correct 117 ms 8556 KB Output is correct
5 Correct 117 ms 8684 KB Output is correct
6 Correct 4 ms 1388 KB Output is correct
7 Correct 4 ms 1388 KB Output is correct
8 Correct 6 ms 1260 KB Output is correct
9 Correct 6 ms 1260 KB Output is correct
10 Correct 5 ms 1260 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 641 ms 3112 KB Output is correct
2 Correct 1238 ms 3184 KB Output is correct
3 Correct 52 ms 3308 KB Output is correct
4 Correct 34 ms 3180 KB Output is correct
5 Correct 30 ms 3436 KB Output is correct
6 Correct 298 ms 3120 KB Output is correct
7 Correct 258 ms 3256 KB Output is correct
8 Correct 316 ms 3052 KB Output is correct
9 Correct 337 ms 2992 KB Output is correct
10 Correct 264 ms 3052 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 1260 KB Output is correct
2 Correct 15 ms 1260 KB Output is correct
3 Correct 27 ms 1644 KB Output is correct
4 Correct 117 ms 8556 KB Output is correct
5 Correct 117 ms 8684 KB Output is correct
6 Correct 4 ms 1388 KB Output is correct
7 Correct 4 ms 1388 KB Output is correct
8 Correct 6 ms 1260 KB Output is correct
9 Correct 6 ms 1260 KB Output is correct
10 Correct 5 ms 1260 KB Output is correct
11 Correct 641 ms 3112 KB Output is correct
12 Correct 1238 ms 3184 KB Output is correct
13 Correct 52 ms 3308 KB Output is correct
14 Correct 34 ms 3180 KB Output is correct
15 Correct 30 ms 3436 KB Output is correct
16 Correct 298 ms 3120 KB Output is correct
17 Correct 258 ms 3256 KB Output is correct
18 Correct 316 ms 3052 KB Output is correct
19 Correct 337 ms 2992 KB Output is correct
20 Correct 264 ms 3052 KB Output is correct
21 Correct 646 ms 3060 KB Output is correct
22 Correct 1238 ms 3308 KB Output is correct
23 Correct 1192 ms 3608 KB Output is correct
24 Correct 574 ms 10812 KB Output is correct
25 Correct 180 ms 10732 KB Output is correct
26 Correct 160 ms 11116 KB Output is correct
27 Correct 36 ms 4972 KB Output is correct
28 Correct 37 ms 4972 KB Output is correct
29 Correct 1612 ms 10932 KB Output is correct
30 Correct 167 ms 10732 KB Output is correct
31 Correct 150 ms 10996 KB Output is correct
32 Correct 161 ms 10860 KB Output is correct
33 Correct 538 ms 10860 KB Output is correct
34 Correct 155 ms 10988 KB Output is correct
35 Correct 135 ms 10860 KB Output is correct
36 Correct 152 ms 10860 KB Output is correct
37 Correct 155 ms 11160 KB Output is correct
38 Correct 834 ms 11208 KB Output is correct
39 Correct 714 ms 11068 KB Output is correct
40 Correct 579 ms 10860 KB Output is correct
41 Correct 1356 ms 10808 KB Output is correct
42 Correct 982 ms 10736 KB Output is correct
43 Correct 855 ms 11148 KB Output is correct
44 Correct 1061 ms 4496 KB Output is correct
45 Correct 493 ms 4460 KB Output is correct
46 Correct 319 ms 4308 KB Output is correct
47 Correct 525 ms 4460 KB Output is correct
48 Correct 356 ms 4376 KB Output is correct
49 Correct 265 ms 4332 KB Output is correct