Submission #1161639

#	Time	Username	Problem	Language	Result	Execution time	Memory
1161639		hainam2k9	Examination (JOI19_examination)	C++20	100 / 100	267 ms	19912 KiB

examination

#include <bits/stdc++.h>
#define tt cin.tie(0), cout.tie(0), ios_base::sync_with_stdio(0)
#define fo freopen((NAME+".INP").c_str(), "r", stdin), freopen((NAME+".OUT").c_str(), "w", stdout)
#define ll long long
#define ull unsigned long long
#define i128 __int128
#define db long double
#define sz(a) ((int)(a).size())
#define pb push_back
#define pf emplace_front
#define pob pop_back
#define pof pop_front
#define lb lower_bound
#define ub upper_bound
#define fi first
#define se second
#define ins emplace
#define mp make_pair
using namespace std;
const int MOD = 1e9+7, MAXN = 1e5+5;
const string NAME = "";
int n,q,x,y,z,cnt=0,rs[MAXN];
int bit1[MAXN<<2],bit2[MAXN<<2];
pair<int,int> p[MAXN];
vector<vector<int>> v;
void update(int pos, int val, int bit[]){
    while(pos<=n<<2) bit[pos]+=val, pos+=pos&-pos;
}
int get(int pos, int bit[]){
    int rs=0;
    while(pos>0) rs+=bit[pos], pos-=pos&-pos;
    return rs;
}
void compress(){
    vector<int> a;
    for(int i = 0; i<sz(v); ++i)
        a.pb(v[i][2]), a.pb(v[i][3]);
    sort(a.begin(),a.end());
    a.resize(unique(a.begin(),a.end())-a.begin());
    for(int i = 0; i<sz(v); ++i)
        v[i][2]=lb(a.begin(),a.end(),v[i][2])-a.begin()+1,
        v[i][3]=lb(a.begin(),a.end(),v[i][3])-a.begin()+1;
}
int main()
{
    tt;
    if(fopen((NAME + ".INP").c_str(), "r")) fo;
    cin >> n >> q;
    for(int i = 1; i<=n; ++i){
        cin >> p[i].fi >> p[i].se;
        v.pb({p[i].fi+p[i].se,1,p[i].fi,p[i].se,0});
    }
    for(int i = 1; i<=q; ++i){
        cin >> x >> y >> z;
        v.pb({max(x+y,z),-1,x,y,i});
    }
    sort(v.begin(),v.end());
    compress();
    for(int i = sz(v)-1; i>=0; --i){
        if(v[i][1]==1) update(v[i][2],1,bit1), update(v[i][3],1,bit2), ++cnt;
        else rs[v[i][4]]=cnt-get(v[i][2]-1,bit1)-get(v[i][3]-1,bit2);
    }
    for(int i = 1; i<=q; ++i)
        cout << rs[i] << "\n";
}

Compilation message (stderr)

examination.cpp: In function 'int main()':
examination.cpp:3:19: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    3 | #define fo freopen((NAME+".INP").c_str(), "r", stdin), freopen((NAME+".OUT").c_str(), "w", stdout)
      |            ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
examination.cpp:47:45: note: in expansion of macro 'fo'
   47 |     if(fopen((NAME + ".INP").c_str(), "r")) fo;
      |                                             ^~
examination.cpp:3:63: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    3 | #define fo freopen((NAME+".INP").c_str(), "r", stdin), freopen((NAME+".OUT").c_str(), "w", stdout)
      |                                                        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
examination.cpp:47:45: note: in expansion of macro 'fo'
   47 |     if(fopen((NAME + ".INP").c_str(), "r")) fo;
      |                                             ^~

• Subtask 1: 2 / 2
• Subtask 2: 20 / 20
• Subtask 3: 21 / 21
• Subtask 4: 57 / 57