Submission #1052843

#	Time	Username	Problem	Language	Result	Execution time	Memory
1052843		phong	Pinball (JOI14_pinball)	C++17	0 / 100	1 ms	6744 KiB

pinball

//#pragma GCC optimize("Ofast")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,fma")
//#pragma GCC optimize("unroll-loops")
#include<bits/stdc++.h>

#define ll long long
const int nmax = 2e5 + 5, N = 1e6;
const ll oo = 1e9 + 5, base = 311;
const int lg = 17, tx = 26;
const ll mod = 998244353;
#define pii pair<ll, ll>
#define fi first
#define se second
#define endl "\n"
#define debug(a, n) for(int i = 1; i <= n; ++i) cout << a[i] << ' '; cout << "\n";
using namespace std;

int n, k;
pii  c[nmax];
struct node{
    int first, second, id;
}a[nmax];
int L[nmax];

struct SEG{
    int tree[nmax << 2];
    void update(int id, int l, int r, int u, int val){
        if(l > u|| r < u)return;
        if(l >= u && r <= u){
            tree[id] = val;
            return;
        }
        int mid = r + l >> 1;
        update(id << 1, l, mid, u, val);
        update(id << 1 | 1, mid + 1, r, u, val);
        tree[id] = max(tree[id << 1], tree[id << 1 | 1]);
    }
    int get(int val){
        if(tree[1] < val) return 0;
        int id = 1, l = 1, r = k;
        while(l != r){
            int mid = r + l >> 1;
            if(tree[id << 1 | 1] >= val){
                id = id << 1 | 1;
                l = mid + 1;
            }
            else{
                id = id << 1;
                r = mid;
            }
        }
        return l;
    }
}tree;
struct BIT{
    int f[nmax];
    void update(int u, int val){
        for(; u; u -= u&-u) f[u] += val;
    }
    int get(int u){
        int res = 0;
        for(; u <= k; u += u&-u) res += f[u];
        return res;
    }
}F;
int d[nmax];

main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
//    freopen("code.inp", "r", stdin);
//    freopen("code.out", "w", stdout);
    cin >> n >> k;
    for(int i = 1; i <= n; ++i) cin >> a[i].fi >> a[i].se, a[i].id = i;
    for(int i = 1; i <= k; ++i) cin >> c[i].fi, c[i].se = i, d[i] = c[i].fi;
    sort(a + 1, a + 1 + n, [](node a, node b){
         return max(a.fi, a.se) < max(b.fi, b.se);
         });
    sort(c + 1, c + 1 + k);
    int pos = 1;//
    for(int i = 1; i <= n; ++i){
        while(pos <= k && c[pos].fi < max(a[i].fi, a[i].se)){
            tree.update(1, 1, k, c[pos].se, c[pos].fi);
            ++pos;
        }
        L[i] = tree.get(min(a[i].fi, a[i].se));
    }
    pos = k;//
    ll ans = 0;
    for(int i = n; i >= 1; --i){
        while(pos >= 1 && c[pos].fi >= max(a[i].fi, a[i].se)){
            F.update(c[pos].se, 1);
            --pos;
        }
        int x = L[i];
        bool idx = 0;
        int val = F.get(L[i] + 1);

        if(L[i] > 0){
            if(d[L[i]] >= a[i].fi){
                idx = 1;
            }
            else{
                idx = 0;
            }
        }
        if(val & 1) idx ^= 1;
        if(!idx) ans += a[i].fi;
        else ans += a[i].se;
//        cout << a[i].id << ' ' << val << endl;
    }
    cout << ans;
}
/*
2 3
1 4
4 1
2 6 5
*/

Compilation message (stderr)

pinball.cpp: In member function 'void SEG::update(int, int, int, int, int)':
pinball.cpp:33:21: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   33 |         int mid = r + l >> 1;
      |                   ~~^~~
pinball.cpp: In member function 'int SEG::get(int)':
pinball.cpp:42:25: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   42 |             int mid = r + l >> 1;
      |                       ~~^~~
pinball.cpp: At global scope:
pinball.cpp:68:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   68 | main(){
      | ^~~~
pinball.cpp: In function 'int main()':
pinball.cpp:95:13: warning: unused variable 'x' [-Wunused-variable]
   95 |         int x = L[i];
      |             ^

• Subtask 1: 0 / 11
• Subtask 2: 0 / 18
• Subtask 3: 0 / 22
• Subtask 4: 0 / 49