Submission #491983

#	Time	Username	Problem	Language	Result	Execution time	Memory
491983		ponytail	Distributing Candies (IOI21_candies)	C++17	27 / 100	1296 ms	139196 KiB

candies

//To be submitted - START

#include "candies.h"
#include <bits/stdc++.h>
#include <vector>
using namespace std;


std::vector<int> distribute_candies(std::vector<int> c, std::vector<int> l,
                                    std::vector<int> r, std::vector<int> v);

//Segment tree beats: version 2
//range min-with, range max-with, range add, range sum
struct segtree_beats {
    bool cmp(__int128 x, __int128 y) { return x > y; }
    int stok;
    const __int128 extr = 2e18;
    struct node {
        __int128 max1, max2, maxc;
        __int128 min1, min2, minc;
        __int128 lazy, sum;
        __int128 l, r;
    };
    vector<node> a;
    void pushtag_max(int idx, __int128 val) {
        if(val >= a[idx].max1) return;
        a[idx].sum -= (a[idx].max1 - val) * a[idx].maxc;
        a[idx].max1 = val;
        if(a[idx].l == a[idx].r) {
            a[idx].min1 = val;
        }
        else {
            if(a[idx].min1 >= val) {
                a[idx].min1 = val;
                a[idx].min2 = extr;
                a[idx].minc = a[idx].r - a[idx].l + 1;
            }
            else if(a[idx].min2 > val && a[idx].min2 != extr) {
                a[idx].min2 = val;
            }
        }
    }
    void pushtag_min(int idx, __int128 val) {
        if(val <= a[idx].min1) return;
        a[idx].sum += (val - a[idx].min1) * a[idx].minc;
        a[idx].min1 = val;
        if(a[idx].l == a[idx].r) {
            a[idx].max1 = val;
        }
        else {
            if(a[idx].max1 <= val) {
                a[idx].max1 = val;
                a[idx].max2 = -extr;
                a[idx].maxc = a[idx].r - a[idx].l + 1;
            }
            else if(a[idx].max2 < val && a[idx].max2 != -extr) {
                a[idx].max2 = val;
            }
        }
    }
    void pushtag_add(int idx, __int128 val) {
        a[idx].max1 += val;
        if(a[idx].max2 != -extr) a[idx].max2 += val;
        a[idx].min1 += val;
        if(a[idx].min2 != extr) a[idx].min2 += val;
        a[idx].lazy += val;
        a[idx].sum += val * (a[idx].r - a[idx].l + 1);
    }
    void pushdown(int idx) {
        pushtag_add(2*idx+1, a[idx].lazy);
        pushtag_add(2*idx+2, a[idx].lazy);
        a[idx].lazy = 0;
        pushtag_max(2*idx+1, a[idx].max1);
        pushtag_max(2*idx+2, a[idx].max1);
        pushtag_min(2*idx+1, a[idx].min1);
        pushtag_min(2*idx+2, a[idx].min1);
    }
    void pushup(int idx) {
        __int128 max1, max2, maxc;
        __int128 min1, min2, minc;
        __int128 lazy, sum;
        __int128 l, r;
        a[idx].max1 = max(a[2*idx+1].max1, a[2*idx+2].max1);
        a[idx].max2 = (a[2*idx+1].max1 == a[2*idx+2].max1 ?
                       max(a[2*idx+1].max2, a[2*idx+2].max2) :
                       (a[2*idx+1].max1 < a[2*idx+2].max1 ?
                        max(a[2*idx+1].max1, a[2*idx+2].max2) : 
                        max(a[2*idx+1].max2, a[2*idx+2].max1)
                        ));
        a[idx].maxc = (a[2*idx+1].max1 == a[2*idx+2].max1 ? 
                       a[2*idx+1].maxc + a[2*idx+2].maxc :
                       (a[2*idx+1].max1 < a[2*idx+2].max1 ? 
                        a[2*idx+2].maxc :
                        a[2*idx+1].maxc)
                       );
        a[idx].min1 = min(a[2*idx+1].min1, a[2*idx+2].min1);
        a[idx].min2 = (a[2*idx+1].min1 == a[2*idx+2].min1 ?
                       min(a[2*idx+1].min2, a[2*idx+2].min2) :
                       (a[2*idx+1].min1 > a[2*idx+2].min1 ?
                        min(a[2*idx+1].min1, a[2*idx+2].min2) : 
                        min(a[2*idx+1].min2, a[2*idx+2].min1)
                        ));
        a[idx].minc = (a[2*idx+1].min1 == a[2*idx+2].min1 ? 
                       a[2*idx+1].minc + a[2*idx+2].minc :
                       (a[2*idx+1].min1 > a[2*idx+2].min1 ? 
                        a[2*idx+2].minc :
                        a[2*idx+1].minc)
                       );
        a[idx].sum = a[2*idx+1].sum + a[2*idx+2].sum;
    }
    void init1(int l, int r, int idx, __int128 val) {
        a[idx].l = l, a[idx].r = r;
        if(l == r) {
            a[idx].max1 = a[idx].min1 = val;
            a[idx].max2 = -extr;
            a[idx].min2 = extr;
            a[idx].maxc = a[idx].minc = 1;
            a[idx].lazy = 0;
            a[idx].sum = val;
            return;
        }
        int mid = (l+r) >> 1;
        init1(l, mid, 2*idx+1, val);
        init1(mid+1, r, 2*idx+2, val);
        pushup(idx);
    }
    void u1(int l, int r, int constl, int constr, int idx, __int128 v) {
        if(v >= a[idx].max1) return;
        if(l<=constl && constr<=r && v>a[idx].max2) {
            pushtag_max(idx, v);
            return;
        }
        pushdown(idx);
        int mid = (constl+constr) >> 1;
        if(mid < l || r < constl) u1(l, r, mid+1, constr, 2*idx+2, v);
        else if(constr < l || r < mid+1) u1(l, r, constl, mid, 2*idx+1, v);
        else {
            u1(l, r, constl, mid, 2*idx+1, v);
            u1(l, r, mid+1, constr, 2*idx+2, v);
        }
        pushup(idx);
    }
    void u2(int l, int r, int constl, int constr, int idx, __int128 v) {
        if(v <= a[idx].min1) return;
        if(l<=constl && constr<=r && v<a[idx].min2) {
            pushtag_min(idx, v);
            return;
        }
        pushdown(idx);
        int mid = (constl+constr) >> 1;
        if(mid < l || r < constl) u2(l, r, mid+1, constr, 2*idx+2, v);
        else if(constr < l || r < mid+1) u2(l, r, constl, mid, 2*idx+1, v);
        else {
            u2(l, r, constl, mid, 2*idx+1, v);
            u2(l, r, mid+1, constr, 2*idx+2, v);
        }
        pushup(idx);
    }
    void u3(int l, int r, int constl, int constr, int idx, __int128 v) {
        if(l <= constl && constr <= r) {
            pushtag_add(idx, v);
            return;
        }
        pushdown(idx);
        int mid = (constl+constr) >> 1;
        if(mid < l || r < constl) u3(l, r, mid+1, constr, 2*idx+2, v);
        else if(constr < l || r < mid+1) u3(l, r, constl, mid, 2*idx+1, v);
        else {
            u3(l, r, constl, mid, 2*idx+1, v);
            u3(l, r, mid+1, constr, 2*idx+2, v);
        }
        pushup(idx);
    }
    __int128 qu(int l, int r, int constl, int constr, int idx) {
        if(l <= constl && constr <= r) {
            return a[idx].sum;
        }
        pushdown(idx);
        int mid = (constl+constr) >> 1;
        if(mid < l || r < constl) return qu(l, r, mid+1, constr, 2*idx+2);
        else if(constr < l || r < mid+1) return qu(l, r, constl, mid, 2*idx+1);
        else {
            return qu(l, r, constl, mid, 2*idx+1) + qu(l, r, mid+1, constr, 2*idx+2);
        }
    }
    public:
    void resize(int k) {
        stok = k;
        a.resize(4*k + 10);
    }
    void init(__int128 v) { // Initialize everything to v
        init1(0, stok, 0, v);
    }
    void min_with(int l, int r, __int128 v) {
        u1(l, r, 0, stok, 0, v);
    }
    void max_with(int l, int r, __int128 v) {
        u2(l, r, 0, stok, 0, v);
    }
    void range_add(int l, int r, __int128 v) {
        u3(l, r, 0, stok, 0, v);
    }
    long long query_sum(int l, int r) {
        return (long long)qu(l, r, 0, stok, 0);
    }
};

std::vector<int> distribute_candies(std::vector<int> c, std::vector<int> l,
                                    std::vector<int> r, std::vector<int> v) {
    int n = c.size();
    std::vector<int> s(n);
    int q = l.size();
    segtree_beats a;
    a.resize(n);
    a.init(0);
    for(int i=0; i<q; i++) {
        a.range_add(l[i], r[i], v[i]);
        a.min_with(l[i], r[i], c[0]);
        a.max_with(l[i], r[i], 0);
    }
    for(int i=0; i<n; i++) {
        s[i] = a.query_sum(i, i);
    }
    return s;
}

//To be submitted - END

Compilation message (stderr)

candies.cpp: In member function 'void segtree_beats::pushup(int)':
candies.cpp:79:18: warning: unused variable 'max1' [-Wunused-variable]
   79 |         __int128 max1, max2, maxc;
      |                  ^~~~
candies.cpp:79:24: warning: unused variable 'max2' [-Wunused-variable]
   79 |         __int128 max1, max2, maxc;
      |                        ^~~~
candies.cpp:79:30: warning: unused variable 'maxc' [-Wunused-variable]
   79 |         __int128 max1, max2, maxc;
      |                              ^~~~
candies.cpp:80:18: warning: unused variable 'min1' [-Wunused-variable]
   80 |         __int128 min1, min2, minc;
      |                  ^~~~
candies.cpp:80:24: warning: unused variable 'min2' [-Wunused-variable]
   80 |         __int128 min1, min2, minc;
      |                        ^~~~
candies.cpp:80:30: warning: unused variable 'minc' [-Wunused-variable]
   80 |         __int128 min1, min2, minc;
      |                              ^~~~
candies.cpp:81:18: warning: unused variable 'lazy' [-Wunused-variable]
   81 |         __int128 lazy, sum;
      |                  ^~~~
candies.cpp:81:24: warning: unused variable 'sum' [-Wunused-variable]
   81 |         __int128 lazy, sum;
      |                        ^~~
candies.cpp:82:18: warning: unused variable 'l' [-Wunused-variable]
   82 |         __int128 l, r;
      |                  ^
candies.cpp:82:21: warning: unused variable 'r' [-Wunused-variable]
   82 |         __int128 l, r;
      |                     ^

• Subtask 1: 0 / 3
• Subtask 2: 0 / 8
• Subtask 3: 27 / 27
• Subtask 4: 0 / 29
• Subtask 5: 0 / 33