Submission #860439

#	Time	Username	Problem	Language	Result	Execution time	Memory
860439		nnhzzz	Exhibition (JOI19_ho_t2)	C++14	100 / 100	46 ms	10020 KiB

joi2019_ho_t2

#include<bits/stdc++.h>

using namespace std;

#define REP(i,a,b) for(int i = (a); i<=(b); ++i)
#define REPD(i,a,b) for(int i = (a); i>=(b); --i)
#define REPDIS(i,a,b,c) for(int i = (a); i<=(b); i += c)
#define task "test"
#define task1 "nnhzzz"
#define ALL(x) (x).begin(),(x).end()
#define SZ(x) (int)(x).size()
#define MASK(x) (1LL<<x)
#define BIT(x,i) ((x>>i)&1LL)
#define vi vector<int>
#define vvi vector<vi>
#define pii pair<int,int>
#define vpii vector<pii>
#define fi first
#define se second
#define ld long double
#define ll long long
#define int ll

//-------------------------------------------------------------------------------//
template<typename T> bool mini(T &a, T b){if(a>b){a=b;return true;}return false;}
template<typename T> bool maxi(T &a, T b){if(a<b){a=b;return true;}return false;}
//-------------------------------------------------------------------------------//
const int MAXN = 5e5+7,N = 1e5+7,inf = 1e9,LOG = 20;
const int MOD = 1e9+7,MOD1 = 123456789;
//-------------------------------------------------------------------------------//

pii a[MAXN];
int c[MAXN];

void solve(){
    int n,m; cin >> n >> m;
    REP(i,0,n-1) cin >> a[i].se >> a[i].fi;
    REP(i,0,m-1) cin >> c[i];
    sort(a,a+n); sort(c,c+m);
    int res = 0,j = m-1;
    REPD(i,n-1,0){
        if(j==-1) break;
        if(a[i].se<=c[j]){
            --j; ++res;
        }
    }
    cout << res;
}

signed main(){
    ios::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    if(fopen(task".inp","r")){
        freopen(task".inp","r",stdin);
        freopen(task".out","w",stdout);
    }
    if(fopen(task1".inp","r")){
        freopen(task1".inp","r",stdin);
        freopen(task1".out","w",stdout);
    }
    solve();
    return 0;
}

Compilation message (stderr)

joi2019_ho_t2.cpp: In function 'int main()':
joi2019_ho_t2.cpp:54:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   54 |         freopen(task".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
joi2019_ho_t2.cpp:55:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   55 |         freopen(task".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
joi2019_ho_t2.cpp:58:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   58 |         freopen(task1".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
joi2019_ho_t2.cpp:59:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   59 |         freopen(task1".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

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