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Submission #119308

# Submission time Handle Problem Language Result Execution time Memory
119308 2019-06-21T02:23:34 Z tmwilliamlin168 Printed Circuit Board (CEOI12_circuit) C++14
75 / 100
 100 ms 37352 KB 
#include <bits/stdc++.h>
using namespace std;

#define ll long long

const int mxN=2e5;
int n, b[mxN], c[mxN+1], e1[mxN], e2[mxN];
array<ll, 2> a[mxN+1];
vector<int> va[mxN], vr[mxN], vp[mxN], ans;

bool cw(int x, int y, int z) {
	return (a[z][1]-a[x][1])*(a[y][0]-a[x][0])<(a[y][1]-a[x][1])*(a[z][0]-a[x][0]);
}

bool pcmp(const int &i, const int &j) {
	return a[i][1]*a[j][0]<a[j][1]*a[i][0];
}

struct scmp {
	bool operator()(const int &i, const int &j) const {
		if(e1[i]==e1[j])
			return c[e2[i]]<c[e2[j]]?!cw(e1[j], e2[j], e2[i]):cw(e1[i], e2[i], e2[j]);
		return c[e1[i]]<c[e1[j]]?cw(e1[i], e2[i], e1[j]):!cw(e1[j], e2[j], e1[i]);
	}
};
set<int, scmp> s;

int main() {
	scanf("%d", &n);
	for(int i=0; i<n; ++i)
		scanf("%d%d", &a[i][0], &a[i][1]);
	a[n]=a[0];
	iota(b, b+n, 0);
	sort(b, b+n, pcmp);
	for(int i=0; i<n; ++i) {
		c[i]=lower_bound(b, b+n, i, pcmp)-b;
		vp[c[i]].push_back(i);
	}
	c[n]=c[0];
	for(int i=0; i<n; ++i) {
		e1[i]=i;
		e2[i]=i+1;
		if(c[e2[i]]<c[e1[i]])
			swap(e1[i], e2[i]);
		if(c[e1[i]]<c[e2[i]]) {
			va[c[e1[i]]].push_back(i);
			vr[c[e2[i]]].push_back(i);
		}
	}
	for(int i=0; i<n; ++i) {
		for(int j : vr[i])
			s.erase(j);
		for(int j : va[i])
			s.insert(j);
		int mj=-1;
		for(int j : vp[i])
			if(mj<0||a[j][0]+a[j][1]<a[mj][0]+a[mj][1])
				mj=j;
		if(~mj&&(!s.size()||!cw(e1[*s.begin()], e2[*s.begin()], mj)))
			ans.push_back(mj);
	}
	printf("%d\n", ans.size());
	sort(ans.begin(), ans.end());
	for(int a : ans)
		printf("%d ", a+1);
}

Compilation message

circuit.cpp: In function 'int main()':
circuit.cpp:31:35: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'std::array<long long int, 2>::value_type* {aka long long int*}' [-Wformat=]
   scanf("%d%d", &a[i][0], &a[i][1]);
                                   ^
circuit.cpp:31:35: warning: format '%d' expects argument of type 'int*', but argument 3 has type 'std::array<long long int, 2>::value_type* {aka long long int*}' [-Wformat=]
circuit.cpp:62:27: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::vector<int>::size_type {aka long unsigned int}' [-Wformat=]
  printf("%d\n", ans.size());
                 ~~~~~~~~~~^
circuit.cpp:29:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
  ~~~~~^~~~~~~~~~
circuit.cpp:31:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &a[i][0], &a[i][1]);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
75.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 14464 KB Output is correct
2 Correct 15 ms 14592 KB Output is correct
3 Correct 15 ms 14848 KB Output is correct
4 Correct 17 ms 15052 KB Output is correct
5 Correct 26 ms 15616 KB Output is correct
6 Correct 26 ms 15608 KB Output is correct
7 Correct 43 ms 16712 KB Output is correct
8 Correct 24 ms 15352 KB Output is correct
9 Correct 21 ms 15488 KB Output is correct
10 Correct 29 ms 15608 KB Output is correct
11 Correct 28 ms 15744 KB Output is correct
12 Correct 31 ms 16760 KB Output is correct
13 Correct 66 ms 17784 KB Output is correct
14 Correct 54 ms 18808 KB Output is correct
15 Correct 57 ms 19960 KB Output is correct
16 Execution timed out 109 ms 25464 KB Time limit exceeded
17 Execution timed out 230 ms 25976 KB Time limit exceeded
18 Execution timed out 208 ms 36344 KB Time limit exceeded
19 Execution timed out 210 ms 36416 KB Time limit exceeded
20 Execution timed out 536 ms 37352 KB Time limit exceeded