Submission #227475

#	Time	Username	Problem	Language	Result	Execution time	Memory
227475		cgiosy	곡선 자르기 (KOI17_cut)	C++17	100 / 100	644 ms	44412 KiB

cut

#pragma GCC optimize("O3")
#include <bits/stdc++.h>
using namespace std;

int main() {
	ios::sync_with_stdio(0);
	int N, sx, sy, px, py, qx;
	cin>>N>>sx>>sy; px=qx=sx, py=sy;
	set<int> A;
	for(int i=N; i--;) {
		int x, y;
		if(i) cin>>x>>y;
		else x=sx, y=sy;
		if((y>0)!=(py>0) || !i && (y>0 && py>0)) {
			if((!i || y<0) && qx!=x && !A.count(qx*2) && !A.count(qx*2+1) && !A.count(x*2) && !A.count(x*2+1)) {
				A.insert(min(qx, x)*2);
				A.insert(max(qx, x)*2+1);
			}
			qx=x;
		}
		px=x, py=y;
	}
	int a=0, b=0, c=0, p=0;
	for(int x:A) {
		if(x%2) a+=!--c, b+=!p, p=1;
		else c++, p=0;
	}
	cout<<a<<' '<<b;
}

Compilation message (stderr)

cut.cpp: In function 'int main()':
cut.cpp:14:26: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   if((y>0)!=(py>0) || !i && (y>0 && py>0)) {
                       ~~~^~~~~~~~~~~~~~~~
cut.cpp:7:17: warning: variable 'px' set but not used [-Wunused-but-set-variable]
  int N, sx, sy, px, py, qx;
                 ^~

• Subtask 1: 11 / 11
• Subtask 2: 24 / 24
• Subtask 3: 65 / 65