Submission #308941

#	Time	Username	Problem	Language	Result	Execution time	Memory
308941		Hemimor	Lightning Rod (NOI18_lightningrod)	C++14	0 / 100	2049 ms	87672 KiB

Main

#include <algorithm>
#include <iostream>
#include <iomanip>
#include <numeric>
#include <cassert>
#include <vector>
#include <random>
#include <cmath>
#include <queue>
#include <set>
#include <map>
#define syosu(x) fixed<<setprecision(x)
using namespace std;
typedef long long ll;
typedef unsigned int uint;
typedef unsigned long long ull;
typedef pair<int,int> P;
typedef pair<double,double> pdd;
typedef pair<ll,ll> pll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<double> vd;
typedef vector<vd> vvd;
typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef vector<string> vs;
typedef vector<P> vp;
typedef vector<vp> vvp;
typedef vector<pll> vpll;
typedef pair<int,P> pip;
typedef vector<pip> vip;
const int inf=1<<30;
const ll INF=1ll<<60;
const double pi=acos(-1);
const double eps=1e-8;
const ll mod=1e9+7;
const int dx[8]={-1,0,1,0,1,1,-1,-1},dy[8]={0,1,0,-1,1,-1,1,-1};

vi vin(int n,int d=0){
	vi a(n);
	for(int i=0;i<n;i++){
		cin>>a[i];
		a[i]-=d;
	}
	return a;
}

vl vlin(int n,int d=0){
	vl a(n);
	for(auto &i:a){
		cin>>i;
		i-=d;
	}
	return a;
}

vvi vvin(int n,int m){
	vvi a(n,vi(m));
	for(int i=0;i<n;i++) for(auto &j:a[i]) cin>>j;
	return a;
}

vvi gin(int n,int m,int d=1){
	vvi g(n);
	for(int i=0;i<m;i++){
		int u,v;
		cin>>u>>v;
		u-=d,v-=d;
		g[u].push_back(v);
		g[v].push_back(u);
	}
	return g;
}

void vout(vi a){
	int n=a.size();
	cout<<n<<" :";
	for(auto i:a) cout<<' '<<i;
	cout<<endl;
}

void vvout(vvi a){
	int n=a.size();
	for(int i=0;i<n;i++) vout(a[i]);
}

bool ingrid(int x,int y,int n,int m){
	return 0<=x&&x<n&&0<=y&&y<m;
}

int n;

int main(){
	scanf("%d",&n);
	vp a(n);
	for(int i=0;i<n;i++){
		int x,y;
		scanf("%d%d",&x,&y);
		a[i]={x-y,-x-y};
	}
//	sort(a.begin(),a.end());
	int res=0,mn=inf;
	for(auto p:a){
		int y=p.second;
		if(y<mn){
			res++;
			mn=y;
		}
	}
	printf("%d\n",res);
}

Compilation message (stderr)

lightningrod.cpp: In function 'int main()':
lightningrod.cpp:94:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   94 |  scanf("%d",&n);
      |  ~~~~~^~~~~~~~~
lightningrod.cpp:98:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   98 |   scanf("%d%d",&x,&y);
      |   ~~~~~^~~~~~~~~~~~~~

• Subtask 1: 0 / 4
• Subtask 2: 0 / 7
• Subtask 3: 0 / 12
• Subtask 4: 0 / 21
• Subtask 5: 0 / 26
• Subtask 6: 0 / 10
• Subtask 7: 0 / 20