| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 167589 |
2019-12-09T04:16:24 Z |
cgiosy |
None (KOI18_footprint) |
C++17 |
|
59 ms |
632 KB |
#include <bits/stdc++.h>
#define rep(i,x,n) for(int i=x; i<n; i++)
using namespace std;
struct pii {
int x, y;
bool operator<(const pii b) const { return y<b.y || (y==b.y && x<b.x); }
pii operator-(const pii b) const { return {x-b.x, y-b.y}; }
};
long cross(pii a, pii b) { return a.x*long(b.y)-a.y*long(b.x); }
long ccw(pii o, pii a, pii b) { return cross(o-a, o-b); }
int main() {
ios_base::sync_with_stdio(false);cin.tie(nullptr);
int N;
cin>>N;
vector<pii> A(N);
for(auto&[x,y]:A) cin>>x>>y;
swap(A[0], *min_element(begin(A), end(A)));
sort(begin(A)+1, end(A), [&](pii x, pii y) { return ccw(A[0], x, y)<0; });
vector<pii> D1(N), D2(N);
int a=0, c=0;
rep(i, 1, N) D2[i]={2, 0};
rep(i, 0, N) {
rep(j, 0, i) {
if(ccw(A[0], A[j], A[i])==0) continue;
#define maxi(a, b, c, d) \
if(ccw(A[b.y], A[j], A[i])*d<0 \
&& (a.x<b.x+1 || (a.x==b.x+1 && ccw(A[i], A[a.y], A[j])*d<0))) \
a={b.x+1, c}
maxi(D1[i], D2[j], j, 1);
maxi(D2[i], D1[j], j, -1);
}
if(D2[a].x<D2[i].x) a=i;
}
if(D2[a].x<4) {
cout<<"0\n";
return 0;
}
cout<<D2[a].x<<'\n'<<A[0].x<<' '<<A[0].y<<'\n';
do cout<<A[a].x<<' '<<A[a].y<<'\n'; while(a=c++%2 ? D1[a].y : D2[a].y);
}
Compilation message
footprint.cpp: In function 'int main()':
footprint.cpp:40:45: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
do cout<<A[a].x<<' '<<A[a].y<<'\n'; while(a=c++%2 ? D1[a].y : D2[a].y);
~^~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
43 ms |
504 KB |
Output is correct |
| 2 |
Correct |
43 ms |
504 KB |
Output is correct |
| 3 |
Correct |
42 ms |
532 KB |
Output is correct |
| 4 |
Correct |
44 ms |
504 KB |
Output is correct |
| 5 |
Correct |
46 ms |
508 KB |
Output is correct |
| 6 |
Correct |
44 ms |
504 KB |
Output is correct |
| 7 |
Correct |
43 ms |
504 KB |
Output is correct |
| 8 |
Correct |
43 ms |
632 KB |
Output is correct |
| 9 |
Correct |
43 ms |
504 KB |
Output is correct |
| 10 |
Correct |
43 ms |
528 KB |
Output is correct |
| 11 |
Correct |
44 ms |
504 KB |
Output is correct |
| 12 |
Correct |
43 ms |
504 KB |
Output is correct |
| 13 |
Correct |
45 ms |
504 KB |
Output is correct |
| 14 |
Correct |
43 ms |
632 KB |
Output is correct |
| 15 |
Correct |
42 ms |
504 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
376 KB |
Output is correct |
| 2 |
Correct |
3 ms |
404 KB |
Output is correct |
| 3 |
Correct |
2 ms |
376 KB |
Output is correct |
| 4 |
Correct |
2 ms |
376 KB |
Output is correct |
| 5 |
Correct |
2 ms |
376 KB |
Output is correct |
| 6 |
Correct |
2 ms |
376 KB |
Output is correct |
| 7 |
Correct |
2 ms |
376 KB |
Output is correct |
| 8 |
Correct |
2 ms |
376 KB |
Output is correct |
| 9 |
Correct |
2 ms |
376 KB |
Output is correct |
| 10 |
Correct |
2 ms |
376 KB |
Output is correct |
| 11 |
Correct |
2 ms |
376 KB |
Output is correct |
| 12 |
Correct |
2 ms |
376 KB |
Output is correct |
| 13 |
Correct |
2 ms |
376 KB |
Output is correct |
| 14 |
Correct |
2 ms |
376 KB |
Output is correct |
| 15 |
Correct |
2 ms |
380 KB |
Output is correct |
| 16 |
Correct |
2 ms |
376 KB |
Output is correct |
| 17 |
Correct |
2 ms |
380 KB |
Output is correct |
| 18 |
Correct |
2 ms |
376 KB |
Output is correct |
| 19 |
Correct |
2 ms |
376 KB |
Output is correct |
| 20 |
Correct |
2 ms |
376 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
376 KB |
Output is correct |
| 2 |
Correct |
3 ms |
404 KB |
Output is correct |
| 3 |
Correct |
2 ms |
376 KB |
Output is correct |
| 4 |
Correct |
2 ms |
376 KB |
Output is correct |
| 5 |
Correct |
2 ms |
376 KB |
Output is correct |
| 6 |
Correct |
2 ms |
376 KB |
Output is correct |
| 7 |
Correct |
2 ms |
376 KB |
Output is correct |
| 8 |
Correct |
2 ms |
376 KB |
Output is correct |
| 9 |
Correct |
2 ms |
376 KB |
Output is correct |
| 10 |
Correct |
2 ms |
376 KB |
Output is correct |
| 11 |
Correct |
2 ms |
376 KB |
Output is correct |
| 12 |
Correct |
2 ms |
376 KB |
Output is correct |
| 13 |
Correct |
2 ms |
376 KB |
Output is correct |
| 14 |
Correct |
2 ms |
376 KB |
Output is correct |
| 15 |
Correct |
2 ms |
380 KB |
Output is correct |
| 16 |
Correct |
2 ms |
376 KB |
Output is correct |
| 17 |
Correct |
2 ms |
380 KB |
Output is correct |
| 18 |
Correct |
2 ms |
376 KB |
Output is correct |
| 19 |
Correct |
2 ms |
376 KB |
Output is correct |
| 20 |
Correct |
2 ms |
376 KB |
Output is correct |
| 21 |
Correct |
3 ms |
504 KB |
Output is correct |
| 22 |
Correct |
3 ms |
376 KB |
Output is correct |
| 23 |
Correct |
3 ms |
376 KB |
Output is correct |
| 24 |
Correct |
3 ms |
376 KB |
Output is correct |
| 25 |
Correct |
3 ms |
376 KB |
Output is correct |
| 26 |
Correct |
3 ms |
376 KB |
Output is correct |
| 27 |
Correct |
3 ms |
292 KB |
Output is correct |
| 28 |
Correct |
3 ms |
376 KB |
Output is correct |
| 29 |
Correct |
3 ms |
376 KB |
Output is correct |
| 30 |
Correct |
3 ms |
376 KB |
Output is correct |
| 31 |
Correct |
3 ms |
376 KB |
Output is correct |
| 32 |
Correct |
3 ms |
376 KB |
Output is correct |
| 33 |
Correct |
3 ms |
376 KB |
Output is correct |
| 34 |
Correct |
3 ms |
376 KB |
Output is correct |
| 35 |
Correct |
3 ms |
376 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
43 ms |
504 KB |
Output is correct |
| 2 |
Correct |
43 ms |
504 KB |
Output is correct |
| 3 |
Correct |
42 ms |
532 KB |
Output is correct |
| 4 |
Correct |
44 ms |
504 KB |
Output is correct |
| 5 |
Correct |
46 ms |
508 KB |
Output is correct |
| 6 |
Correct |
44 ms |
504 KB |
Output is correct |
| 7 |
Correct |
43 ms |
504 KB |
Output is correct |
| 8 |
Correct |
43 ms |
632 KB |
Output is correct |
| 9 |
Correct |
43 ms |
504 KB |
Output is correct |
| 10 |
Correct |
43 ms |
528 KB |
Output is correct |
| 11 |
Correct |
44 ms |
504 KB |
Output is correct |
| 12 |
Correct |
43 ms |
504 KB |
Output is correct |
| 13 |
Correct |
45 ms |
504 KB |
Output is correct |
| 14 |
Correct |
43 ms |
632 KB |
Output is correct |
| 15 |
Correct |
42 ms |
504 KB |
Output is correct |
| 16 |
Correct |
2 ms |
376 KB |
Output is correct |
| 17 |
Correct |
3 ms |
404 KB |
Output is correct |
| 18 |
Correct |
2 ms |
376 KB |
Output is correct |
| 19 |
Correct |
2 ms |
376 KB |
Output is correct |
| 20 |
Correct |
2 ms |
376 KB |
Output is correct |
| 21 |
Correct |
2 ms |
376 KB |
Output is correct |
| 22 |
Correct |
2 ms |
376 KB |
Output is correct |
| 23 |
Correct |
2 ms |
376 KB |
Output is correct |
| 24 |
Correct |
2 ms |
376 KB |
Output is correct |
| 25 |
Correct |
2 ms |
376 KB |
Output is correct |
| 26 |
Correct |
2 ms |
376 KB |
Output is correct |
| 27 |
Correct |
2 ms |
376 KB |
Output is correct |
| 28 |
Correct |
2 ms |
376 KB |
Output is correct |
| 29 |
Correct |
2 ms |
376 KB |
Output is correct |
| 30 |
Correct |
2 ms |
380 KB |
Output is correct |
| 31 |
Correct |
2 ms |
376 KB |
Output is correct |
| 32 |
Correct |
2 ms |
380 KB |
Output is correct |
| 33 |
Correct |
2 ms |
376 KB |
Output is correct |
| 34 |
Correct |
2 ms |
376 KB |
Output is correct |
| 35 |
Correct |
2 ms |
376 KB |
Output is correct |
| 36 |
Correct |
3 ms |
504 KB |
Output is correct |
| 37 |
Correct |
3 ms |
376 KB |
Output is correct |
| 38 |
Correct |
3 ms |
376 KB |
Output is correct |
| 39 |
Correct |
3 ms |
376 KB |
Output is correct |
| 40 |
Correct |
3 ms |
376 KB |
Output is correct |
| 41 |
Correct |
3 ms |
376 KB |
Output is correct |
| 42 |
Correct |
3 ms |
292 KB |
Output is correct |
| 43 |
Correct |
3 ms |
376 KB |
Output is correct |
| 44 |
Correct |
3 ms |
376 KB |
Output is correct |
| 45 |
Correct |
3 ms |
376 KB |
Output is correct |
| 46 |
Correct |
3 ms |
376 KB |
Output is correct |
| 47 |
Correct |
3 ms |
376 KB |
Output is correct |
| 48 |
Correct |
3 ms |
376 KB |
Output is correct |
| 49 |
Correct |
3 ms |
376 KB |
Output is correct |
| 50 |
Correct |
3 ms |
376 KB |
Output is correct |
| 51 |
Correct |
44 ms |
496 KB |
Output is correct |
| 52 |
Correct |
43 ms |
520 KB |
Output is correct |
| 53 |
Correct |
44 ms |
504 KB |
Output is correct |
| 54 |
Correct |
52 ms |
504 KB |
Output is correct |
| 55 |
Correct |
54 ms |
504 KB |
Output is correct |
| 56 |
Correct |
53 ms |
504 KB |
Output is correct |
| 57 |
Correct |
58 ms |
500 KB |
Output is correct |
| 58 |
Correct |
57 ms |
504 KB |
Output is correct |
| 59 |
Correct |
59 ms |
504 KB |
Output is correct |
| 60 |
Correct |
54 ms |
632 KB |
Output is correct |
| 61 |
Correct |
54 ms |
504 KB |
Output is correct |
| 62 |
Correct |
54 ms |
504 KB |
Output is correct |
| 63 |
Correct |
51 ms |
504 KB |
Output is correct |
| 64 |
Correct |
51 ms |
504 KB |
Output is correct |
| 65 |
Correct |
51 ms |
504 KB |
Output is correct |
| 66 |
Correct |
51 ms |
504 KB |
Output is correct |
| 67 |
Correct |
50 ms |
504 KB |
Output is correct |
| 68 |
Correct |
50 ms |
500 KB |
Output is correct |
