Submission #549892

#	Time	Username	Problem	Language	Result	Execution time	Memory
549892		radal	Fortune Telling 2 (JOI14_fortune_telling2)	C++17	100 / 100	222 ms	25952 KiB

fortune_telling2

#include <bits/stdc++.h>
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2")
//#pragma GCC optimize("unroll-loops")
#define rep(i,l,r) for (int i = l; i < r; i++)
#define repr(i,r,l) for (int i = r; i >= l; i--)
#define X first
#define Y second
#define pb push_back
#define endl '\n'
#define debug(x) cerr << #x << " : " << x << endl;
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int,int> pll;
constexpr int N = 2e5+20,mod = 1e9+7 ,inf = 1e9+10,maxm = (1 << 18)+10;
inline int mkay(int a,int b){
    if (a+b >= mod) return a+b-mod;
    if (a+b < 0) return a+b+mod;
    return a+b;
}
 
inline int poww(int a,int k){
    if (k < 0) return 0;
    int z = 1;
    while (k){
        if (k&1) z = 1ll*z*a%mod;
        a = 1ll*a*a%mod;
        k >>= 1;
    }
    return z;
}
inline bool cmp(pll x,pll y){
    return (x > y);
}
int fen[N],sp[N][20],k;
void upd(int l){
    for(; l < k; l |= (l+1))
        fen[l]++;
}
int que(int l,int r){
    r--;
    l--;
    int ans = 0;
    for (; r >= 0; r = (r&(r+1))-1 ){
        ans += fen[r];
    }
    for (; l >= 0; l = (l&(l+1))-1){
        ans -= fen[l];
    }
    return ans;
}
int main(){
    ios :: sync_with_stdio(0); cin.tie(0);
    int n;
    ll ans = 0;
    vector<pll> v1,v2,q;
    cin >> n >> k;
    rep(i,0,n){
        int a,b;
        cin >> a >> b;
        if (a == b){
            ans += b;
            continue;
        }
        if (a > b) v1.pb({a,b});
        else v2.pb({b,a});
    }
    sort(v1.begin(),v1.end(),cmp);
    sort(v2.begin(),v2.end(),cmp);
    rep(i,0,k){
        int t;
        cin >> t;
        q.pb({t,i});
    }
    sort(q.begin(),q.end());
    rep(i,0,k) sp[i][0] = q[i].Y;
    rep(j,1,20){
        rep(i,0,k){
            sp[i][j] = sp[i][j-1];
            if (i-(1 << (j-1)) >= 0)
                sp[i][j] = max(sp[i][j],sp[i-(1 << (j-1))][j-1]);
        }
    }
    int po = k-1;
    for (pll p : v1){
        while (po >= 0 && q[po].X >= p.X){
            upd(q[po].Y);
            po--;
        }
        if (po < 0 || q[po].X < p.Y){
            if ((k+1-po)&1) ans += p.Y;
            else ans += p.X;
            continue;
        }
        int ind = lower_bound(q.begin(),q.end(),make_pair(p.Y,0))-q.begin();
        int g = 31-__builtin_clz(po-ind+1);
        int mx = max(sp[po][g],sp[ind+(1 << g)-1][g]);
        if (que(mx+1,k)&1) ans += p.Y;
        else ans += p.X;
    }
    po = k-1;
    memset(fen,0,sizeof fen);
    for (pll p : v2){
        while (po >= 0 && q[po].X >= p.X){
            upd(q[po].Y);
            po--;
        }
        if (po < 0 || (po >= 0 && q[po].X < p.Y)){
            if ((k-po+1)&1) ans += p.X;
            else ans += p.Y;
            continue;
        }
        int ind = lower_bound(q.begin(),q.end(),make_pair(p.Y,0))-q.begin();
        int g = 31-__builtin_clz(po-ind+1);
        int mx = max(sp[po][g],sp[ind+(1 << g)-1][g]);
        if (que(mx+1,k)&1) ans += p.Y;
        else ans += p.X;
    }
    cout << ans;
}

• Subtask 1: 4 / 4
• Subtask 2: 31 / 31
• Subtask 3: 65 / 65