Submission #977295

#	Time	Username	Problem	Language	Result	Execution time	Memory
977295		VinhLuu	Fortune Telling 2 (JOI14_fortune_telling2)	C++17	35 / 100	401 ms	262144 KiB

fortune_telling2

//#pragma GCC optimize("O3,unroll-loops")
//#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
#include <bits/stdc++.h>
#define int long long
//#define ll long long
#define fi first
#define se second
#define pb push_back
#define all(lmao) lmao.begin(), lmao.end()

using namespace std;

typedef pair<int,int> pii;
typedef tuple<int,int,int> tp;
const int N = 1e6 + 5;
const int oo = 1e9 + 1;
const int mod = 1e9 + 7;
//const ll oo = 5e18;

int n, k, d[N], a[N], b[N], x[N], y[N], pt[N << 2], t, mx[N << 2], mi[N << 2], st[N << 2], f[N], e[N];

void update(int i,int x){
    i += t - 1;
    mx[i] = max(mx[i], x);
    mi[i] = min(mi[i], x);
    while(i > 1){
        i /= 2;
        mx[i] = max(mx[i << 1], mx[i << 1|1]);
        mi[i] = min(mi[i << 1], mi[i << 1|1]);
    }
}

void add(int i){
    i += k - 1;
    st[i]++;
    while(i > 1){i /= 2;st[i]++;}
}

int get(int type,int l,int r){
    r++;
    int Max = 0, Min = 1e9;
    for(l += t - 1, r += t - 1; l < r; l /= 2, r /= 2){
        if(l & 1) Min = min(Min, mi[l]), Max = max(Max, mx[l]), l++;
        if(r & 1) --r, Min = min(Min, mi[r]), Max = max(Max, mx[r]);
    }
    if(type == 0) return Min;
    return Max;
}

int query(int l,int r){
    if(l > r) return 0;
    r++;
    int ret = 0;
    for(l += k - 1, r += k - 1; l < r; l /= 2, r /= 2){
        if(l & 1) ret += st[l++];
        if(r & 1) ret += st[--r];
    }
    return ret;
}

vector<int> T[N << 2], op[N << 2];

signed main(){
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    #define task "v"
    if(fopen(task ".inp","r")){
        freopen(task ".inp","r",stdin);
        freopen(task ".out","w",stdout);
    }
    cin >> n >> k;
    set<int> s;
    int ans = 0;
    for(int i = 1; i <= n; i ++){
        cin >> a[i] >> b[i];
        if(a[i] == b[i]){
            ans += a[i];
            continue;
        }
        s.insert(a[i]); s.insert(b[i]);
    }
    for(int i = 1; i <= k; i ++){
        cin >> d[i];
        s.insert(d[i]);
    }
    for(auto j : s) pt[++t] = j;
//    for(int i = 1; i <= t; i ++) cerr << pt[i] << " ";
//    cerr << "\n";
    for(int i = 1; i <= 2 * t; i ++) mi[i] = 1e9;
    for(int i = 1; i <= k; i ++){
        d[i] = lower_bound(pt + 1, pt + t + 1, d[i]) - pt;
//        cerr << d[i] << " e\n";
        op[d[i]].pb(i);
    }

    for(int i = 1; i <= n; i ++){
        if(a[i] == b[i]) continue;

        a[i] = lower_bound(pt + 1, pt + t + 1, a[i]) - pt;
        b[i] = lower_bound(pt + 1, pt + t + 1, b[i]) - pt;
//        cerr << a[i] << " " << b[i] << " y\n";
        x[i] = min(a[i], b[i]);
        y[i] = max(a[i], b[i]);
        T[x[i]].pb(i);
    }

    for(int i = t; i >= 1; i --){
        for(auto j : op[i]) update(d[j], j);
        for(auto j : T[i]){
            f[j] = get(0, x[j], y[j] - 1);
            e[j] = get(1, x[j], y[j] - 1);
        }
        T[i].clear();
    }

    for(int i = 1; i <= n; i ++) T[y[i]].pb(i);
    for(int i = t; i >= 1; i --){
        for(auto j : op[i]) add(j);
//        cerr << i << " h\n";
        for(auto j : T[i]){
//            cerr << j << " " << f[j] << " " << e[j] << " t\n";
            if(f[j] == 1e9){
                int tmp = query(1, k);
                ans += pt[(tmp % 2 ? b[j] : a[j])];
//                cerr << j << " " << tmp << " after\n";
            }else{
                int pre = query(1, f[j] - 1);
                int suf = query(e[j] + 1, k);
//                cerr << pre << " " << suf << " t\n";
                if(pre % 2) swap(a[j], b[j]);
//                cerr << a[j] << " " << b[j] << "\n";
                if(a[j] <= b[j]){
                    swap(a[j], b[j]);
//                    cerr << a[j] << " " << b[j] << "\n";
                    if(suf % 2) swap(a[j], b[j]);
//                    cerr << a[j] << " " << pt[a[j]] << " after\n";
                    ans += pt[a[j]];
                }else{
                    if(suf % 2) swap(a[j], b[j]);
//                    cerr << a[j] << " " << pt[a[j]] << " after\n";
                    ans += pt[a[j]];
                }
            }
        }
        T[i].clear();

    }
    cout << ans;

}

Compilation message (stderr)

fortune_telling2.cpp: In function 'int main()':
fortune_telling2.cpp:68:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   68 |         freopen(task ".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
fortune_telling2.cpp:69:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   69 |         freopen(task ".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 4 / 4
• Subtask 2: 31 / 31
• Subtask 3: 0 / 65