Submission #939621

#	Time	Username	Problem	Language	Result	Execution time	Memory
939621		IS_Rushdi	Distributing Candies (IOI21_candies)	C++17	27 / 100	5014 ms	36652 KiB

candies

#include "candies.h" 
#include<bits/stdc++.h>
using namespace std;
typedef int64_t i64;
#define VII vector<int>
 

struct seg{
    vector<i64>mx,mn,cmx,cmn,op,st;
    int sz = 1;
    void build(int x,int lx,int rx){
        if(rx-lx == 1){
            cmx[x] = cmn[x] = 1;
            return;
        }
        int m = (lx+rx)/2;
        build(x*2+1,lx,m);
        build(x*2+2,m,rx);
        cmx[x] = cmx[x*2+1] + cmx[x*2+2];
        cmn[x] = cmn[x*2+1] + cmn[x*2+2];
    }
    seg(int n){
        while(sz < n) sz*=2;
        op.assign(sz*2,0ll);
        mx.assign(sz*2,0ll);
        mn.assign(sz*2,0ll);
        cmx.assign(sz*2,0ll);
        cmn.assign(sz*2,0ll);
        st.assign(sz*2,2e9);
        build(0,0,sz);
    }
    void push(int x,int lx,int rx){
        if(rx-lx == 1) return;
        op[x*2+1] += op[x];
        op[x*2+2] += op[x];
        int m = (lx+rx)/2;
        NQF(x*2+1,lx,m);
        NQF(x*2+2,m,rx);
        op[x] = 0;
    }
    void NQF(int x,int lx,int rx){
        if(rx-lx == 1){
            cmx[x] = cmn[x] = 1;
            mn[x] = mx[x] = op[x];
            return;
        }
        
        mx[x] = max(mx[x*2+1],mx[x*2+2]) + op[x];
        mn[x] = min(mn[x*2+1],mn[x*2+2]) + op[x];
        
        if(mx[x*2+1] > mx[x*2+2]) cmx[x] = cmx[x*2+1];
        else if(mx[x*2+2] > mx[x*2+1]) cmx[x] = cmx[x*2+2];
        else cmx[x] = cmx[x*2+1] + cmx[x*2+2];
        
        if(mn[x*2+1] < mn[x*2+2]) cmn[x] = cmn[x*2+1];
        else if(mn[x*2+2] < mn[x*2+1]) cmn[x] = cmn[x*2+2];
        else cmn[x] = cmn[x*2+1] + cmn[x*2+2];
    }
    void update(int l,int r,int v,int x=0,int lx=0,int rx=-1){
        if(rx == -1) rx = sz;
        if(rx <= l || lx >= r) return;
        NQF(x,lx,rx);
        push(x,lx,rx);
        if(rx <= r && lx >= l){
            mn[x] += v;
            mx[x] += v;
            op[x] += v;
            return;
        }
        int m = (lx+rx)/2;
        update(l,r,v,x*2+1,lx,m);
        update(l,r,v,x*2+2,m,rx);
        NQF(x,lx,rx);
        push(x,lx,rx);
    }
    void checkMAX(int x=0,int lx=0,int rx=-1){
        if(rx == -1) rx = sz;
        NQF(x,lx,rx);
        push(x,lx,rx);
        int v = st[x];
        if(mx[x] > v){
            if(cmx[x] == (rx-lx)){
                op[x] -= mx[x]-v;
            }else{
                int m = (lx+rx)/2;
                checkMAX(x*2+1,lx,m);
                checkMAX(x*2+2,m,rx);
            }
        }
 
        NQF(x,lx,rx);
        push(x,lx,rx);
    }
    void checkMIN(int x=0,int lx=0,int rx=-1){
        if(rx == -1) rx = sz;
        NQF(x,lx,rx);
        push(x,lx,rx);
        if(mn[x] < 0){
            if(cmx[x] == rx-lx){
                op[x] -= mn[x];
                push(x,lx,rx);
            }else{
                int m = (lx+rx)/2;
                checkMIN(x*2+1,lx,m);
                checkMIN(x*2+2,m,rx);
            }
        }
        NQF(x,lx,rx);
        push(x,lx,rx);
    }
    int get(int i,int x=0,int lx=0,int rx=-1){
        if(rx == -1) rx = sz;
        if(rx-lx == 1) return op[x];
        NQF(x,lx,rx);
        push(x,lx,rx);
        int m = (lx+rx)/2;
        if(i < m) return op[x] + get(i,x*2+1,lx,m);
        else return op[x] + get(i,x*2+2,m,rx);
    }
    void wow(vector<int>&arr,int x=0,int lx=0,int rx=-1){
        if(rx == -1) rx = sz;
        if(rx-lx == 1){
            st[x] = arr[lx];
            return;
        }
        int m = (lx+rx)/2;
        wow(arr,x*2+1,lx,m);
        wow(arr,x*2+2,m,rx);
        st[x] = min(st[x*2+1],st[x*2+2]);
    }
};
VII distribute_candies(VII c,VII l ,VII r,VII v) {
    int n = c.size();
    int q = l.size();
    seg st(n+1);
    st.wow(c);
    for(int i = 0; i < q; i++){
        st.update(l[i],r[i]+1,v[i]);
        if(v[i] > 0){
            st.checkMAX();
        }else{
            st.checkMIN();
        }
    }
    
    vector<int>ans;
    for(int i = 0; i < n; i++) ans.push_back(st.get(i));
    return ans;
}
 
// int main(){
//     int n,q; cin >> n >> q;
//     vector<int>l(q),r(q),v(q),c(n);
//     for(int i = 0; i < n; i++) cin >> c[i];
//     for(int i = 0; i < q; i++){
//         cin >> l[i] >> r[i] >> v[i];
//     }
//     vector<int>ans = distribute_candies(c,l,r,v);
//     for(int x : ans){
//         cout << x << ' ';
//     }
// }

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