Submission #813068

#	Time	Username	Problem	Language	Result	Execution time	Memory
813068		ach00	Distributing Candies (IOI21_candies)	C++17	3 / 100	5053 ms	19488 KiB

candies

#include "candies.h"
#include <bits/stdc++.h>
using namespace std;
vector<int> gc;
struct SegmentTree {
    vector<int> tree;
    vector<int> lazy;
    void push(int v, int l, int r) {
        if(l==r) {
            tree[v] += lazy[v];
            tree[v] = max(0, tree[v]);
            tree[v] = min(gc[l], tree[v]);
            lazy[v] = 0;
        } else {
            int m = (l+r)/2;
            if(lazy[2*v]) push(2*v, l, m);
            if(lazy[2*v + 1]) push(2*v + 1, m+1, r);
            lazy[2*v] = lazy[v];
            lazy[2*v+1] = lazy[v];
            lazy[v] = 0;
        }
    }
    void Update(int p, int l, int r, int a, int b, int x) {
        if(b < l || a > r) return;
        if(l >= a && r <= b) {
            if(lazy[p]) push(p, l, r);
            lazy[p] = x;
        } else {
            push(p, l, r);
            int m = (l+r)/2;
            Update(2*p, l, m, a, b, x);
            Update(2*p + 1, m+1, r, a, b, x);
        }
    }
    int Get(int p, int l, int r, int i) {
        push(p,l,r);
        if(l == r && l == i) return tree[p];
        if(r < i || l > i) return 0;
        int m = (l+r)/2;
        return Get(2*p, l, m, i) + Get(2*p + 1, m+1, r, i);
    }
    SegmentTree(int n) {
        tree.resize(4*n, 0);
        lazy.resize(4*n, 0);
    }
};

vector<int> distribute_candies(vector<int> c, vector<int> l, vector<int> r, vector<int> v) {
    int n = c.size();
    gc = c;
    SegmentTree st(n);
    vector<int> s;
    for(int i = 0; i < v.size(); i++) {
        st.Update(1, 0, n-1, l[i], r[i], v[i]);
    }
    for(int i = 0; i < n; i++) {
        s.push_back(st.Get(1, 0, n-1, i));
    }
    return s;
}

Compilation message (stderr)

candies.cpp: In function 'std::vector<int> distribute_candies(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>)':
candies.cpp:53:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 |     for(int i = 0; i < v.size(); i++) {
      |                    ~~^~~~~~~~~~

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