Submission #220580

#	Time	Username	Problem	Language	Result	Execution time	Memory
220580		LittleFlowers__	Exhibition (JOI19_ho_t2)	C++14	100 / 100	59 ms	3580 KiB

joi2019_ho_t2

#include <bits/stdc++.h>
using namespace std;
#define in ({int x=0;int c=getchar(),n=0;for(;!isdigit(c);c=getchar()) n=(c=='-');for(;isdigit(c);c=getchar()) x=x*10+c-'0';n?-x:x;})
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
int rnd(int l,int r){return l+rng()%(r-l+1);}
#define fasty ios_base::sync_with_stdio(0),cin.tie(0);
#define forinc(a,b,c) for(int a=b,_c=c;a<=_c;++a)
#define fordec(a,b,c) for(int a=b,_c=c;a>=_c;--a)
#define forv(a,b) for(auto&a:b)
#define fi first
#define se second
#define pb push_back
#define ii pair<int,int>
#define mt make_tuple
#define all(a) a.begin(),a.end()
#define reset(f, x) memset(f, x, sizeof(f))
#define bit(x,i) ((x>>(i-1))&1)
#define on(x,i) (x|(1ll<<(i-1)))
#define off(x,i) (x&~(1<<(i-1)))
#define gg exit(0);

const int N=100010;

int n,m;
ii a[N];
int b[N];

main(){
    #define task "Exh"
    //freopen(task".inp","r",stdin);
    //freopen(task".out","w",stdout);

    n=in, m=in;
    forinc(i,1,n) a[i]={in,in}, swap(a[i].fi,a[i].se);
    forinc(i,1,m) b[i]=in;
    sort(a+1,a+n+1);
    sort(b+1,b+m+1);

    int j=n,ret=0;
    fordec(i,m,1){
        while(j && a[j].se>b[i]) j--;
        if(j){
            ret++;
            j--;
        }
    }
    cout<<ret;
}

Compilation message (stderr)

joi2019_ho_t2.cpp:28:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main(){
      ^

• Subtask 1: 10 / 10
• Subtask 2: 40 / 40
• Subtask 3: 50 / 50