Submission #337269

#	Time	Username	Problem	Language	Result	Execution time	Memory
337269		Register	Stations (IOI20_stations)	C++14	Compilation error	0 ms	0 KiB

stations

#include <bits/stdc++.h>
using namespace std;
typedef vector<int> vec;
const int N=205;
int n,ns,a[N],b[N],ans[N];
inline bool cmp1(const int&x,const int&y) {return b[x]==b[y]?a[x]<a[y]:b[x]<b[y];}
inline bool cmp2(const int&x,const int&y) {return atan2(a[x]-a[ns],b[x]-b[ns])<atan2(a[y]-a[ns],b[y]-b[ns]);}
inline void add(int x,int y) {ans[min(x,y)]=max(x,y)-n;}
void solve(vec s){
	sort(s.begin(),s.end(),cmp1);
	ns=s[0];s.erase(s.begin());
	stable_sort(s.begin(),s.end(),cmp2);vec t;
	for(int c=0,x;;){
		x=s[0];s.erase(s.begin());
		if((x>n)^(ns>n)) c++;else c--;
		if(c>0){
			add(ns,x);
			if(!s.empty()) solve(s);
			if(!t.empty()) solve(t);
			break;
		}
		t.push_back(x);
	}
}
signed main(){
	scanf("%d",&n);vec s;
	for(int i=1;i<=n*2;i++) {scanf("%d%d",&a[i],&b[i]);s.push_back(i);}
	solve(s);
	for(int i=1;i<=n;i++) printf("%d\n",ans[i]);
	return 0;
}
//test

Compilation message (stderr)

stations.cpp: In function 'int main()':
stations.cpp:26:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   26 |  scanf("%d",&n);vec s;
      |  ~~~~~^~~~~~~~~
stations.cpp:27:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   27 |  for(int i=1;i<=n*2;i++) {scanf("%d%d",&a[i],&b[i]);s.push_back(i);}
      |                           ~~~~~^~~~~~~~~~~~~~~~~~~~
/tmp/cc6HyWpF.o: In function `main':
stub.cpp:(.text.startup+0x0): multiple definition of `main'
/tmp/ccB9p12y.o:stations.cpp:(.text.startup+0x0): first defined here
/tmp/cc6HyWpF.o: In function `main':
stub.cpp:(.text.startup+0x29a): undefined reference to `label(int, int, std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >)'
stub.cpp:(.text.startup+0x4bc): undefined reference to `find_next_station(int, int, std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status