Submission #144639

#	Time	Username	Problem	Language	Result	Execution time	Memory
144639		cheetose	Worst Reporter 2 (JOI16_worst_reporter2)	C++11	0 / 100	2 ms	376 KiB

worst_reporter2

#include<cstdio>
#include<cstdlib>
#include<iostream>
#include<vector>
#include<queue>
#include<bitset>
#include<string>
#include<stack>
#include<set>
#include<unordered_set>
#include<map>
#include<unordered_map>
#include<cstring>
#include<complex>
#include<cmath>
#include<iomanip>
#include<numeric>
#include<algorithm>
#include<list>
#include<functional>
#include<cassert>
#define mp make_pair
#define pb push_back
#define X first
#define Y second
#define y0 y12
#define y1 y22
#define INF 9876543219876543
#define PI 3.141592653589793238462643383279502884
#define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
#define fdn(i,a,b,c) for(int (i)=(a);(i)>=(b);(i)-=(c))
#define MEM0(a) memset((a),0,sizeof(a));
#define MEM_1(a) memset((a),-1,sizeof(a));
#define ALL(a) a.begin(),a.end()
#define SYNC ios_base::sync_with_stdio(false);cin.tie(0)
using namespace std;
typedef long long ll;
typedef long double ld;
typedef double db;
typedef unsigned int uint;
typedef unsigned long long ull;
typedef pair<int, int> Pi;
typedef pair<ll, ll> Pll;
typedef pair<ld, ld> Pd;
typedef vector<int> Vi;
typedef vector<ll> Vll;
typedef vector<double> Vd;
typedef vector<Pi> VPi;
typedef vector<Pll> VPll;
typedef vector<Pd> VPd;
typedef tuple<int, int, int> iii;
typedef tuple<int,int,int,int> iiii;
typedef tuple<ll, ll, ll> LLL;
typedef vector<iii> Viii;
typedef vector<LLL> VLLL;
typedef complex<double> base;
const ll MOD = 1000000007;
ll POW(ll a, ll b, ll MMM = MOD) {ll ret=1; for(;b;b>>=1,a=(a*a)%MMM)if(b&1)ret=(ret*a)% MMM; return ret; }
ll gcd(ll a, ll b) { return b ? gcd(b, a%b) : a; }
ll lcm(ll a, ll b) { if (a == 0 || b == 0)return a + b; return a*(b / gcd(a, b)); }
int dx[] = { 0,1,0,-1,1,1,-1,-1 }, dy[] = { 1,0,-1,0,1,-1,1,-1 };

int a[200000],b[200000],c[200000],d[200000];
multiset<int> S;
int main() {
	int n;
	scanf("%d",&n);
	fdn(i,n-1,0,1)scanf("%d%d",a+i,b+i);
	fdn(i,n-1,0,1)scanf("%d%d",c+i,d+i);
	int ans=0,no=0,tot=0,i=0;
	fup(j,0,n-1,1)
	{
		while(i<n && b[i]<=d[j])
		{
			S.insert(a[i++]);
			tot++;
		}
		auto it=S.find(c[j]);
		if(it!=S.end())
		{
			tot--;
			S.erase(it);
		}
		else no++;
		if(tot==no)
		{
			ans+=tot;
			tot=no=0;
			S.clear();
		}
	}
	printf("%d",ans);
}

Compilation message (stderr)

worst_reporter2.cpp: In function 'int main()':
worst_reporter2.cpp:67:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
  ~~~~~^~~~~~~~~
worst_reporter2.cpp:68:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  fdn(i,n-1,0,1)scanf("%d%d",a+i,b+i);
                ~~~~~^~~~~~~~~~~~~~~~
worst_reporter2.cpp:69:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  fdn(i,n-1,0,1)scanf("%d%d",c+i,d+i);
                ~~~~~^~~~~~~~~~~~~~~~

• Subtask 1: 0 / 15
• Subtask 2: 0 / 15
• Subtask 3: 0 / 30
• Subtask 4: 0 / 40