Submission #1112072

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
1112072	2024-11-13T16:02:04 Z	FIFI_cpp	Nile (IOI24_nile)	C++17	Compilation error	0 ms	0 KB

nile

#include <bits/stdc++.h>
#include <iostream>
#include <vector>
#include <algorithm>
#include <numeric>
#include <cstdlib>
#include <cmath>
#include <queue>
#include <stack>
#include <deque>
#include <fstream>
#include <iterator>
#include <set>
#include <map>
#include <unordered_map>
#include <iomanip>
#include <cctype>
#include <string>
#include <cassert>
#include <set>
#include <bitset>
#include <unordered_set>
#include <numeric>

#define all(a) a.begin(), a.end()
#define fast ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
#define pb push_back
#define ppi pair<int,pair<int,int>>
#define int int64_t

using namespace std;
//    /\_/\
//   (= ._.)
//   / >  \>
// encouraging cat
const int INF = 10000000000000000;
const int mod = 1000000007;
//const int mod = 998244353;
const int MAXN = 200005;
//ifstream fin('xor.in');
//ofstream fout('xor.out');
int curr_res = 0;

struct Index {
    int a,b,w;
};
struct Node {
    int parent, max_value, max_index, size, sb;
};
vector<Index> vals;
vector<Node> info;
vector<pair<int,int>> e;
bool cmp(const Index &x, const Index &y) { return x.w < y.w; }
int find_parent(int x)
{
    if (x == info[x].parent)
    {
        return x;
    }
    return info[x].parent == find_parent(info[x].parent);
}
void remove(Node x)
{
    if (x.size % 2 == 0)
    {
        curr_res -= x.sb;
    }
    else
    {
        curr_res -= x.sb - vals[x.max_index].b + vals[x.max_index].a;
    }
}
void add(Node x)
{
    if (x.size % 2 == 0)
    {
        curr_res += x.sb;
    }
    else
    {
        curr_res += x.sb - x.max_value;
    }
}
pair<Node, Node> merge(Node x,Node y, int ix, int iy)
{
    y.parent = ix;
    x.size += y.size;
    if (y.max_value > x.max_value)
    {
        x.max_value = y.max_value;
        x.max_index = y.max_index;
    }
    x.sb += y.sb;
    return {x,y};
}
void onion (int x, int y)
{
    x = find_parent(x);
    y = find_parent(y);
    if (x == y)
        return ;
    remove(info[x]);
    remove(info[y]);
    if (info[y].size > info[x].size)
    {
        swap(x,y);
    }
    pair<Node, Node> m = merge(info[x], info[y], x, y);
    info[x] = m.first;
    info[y] = m.second;
    add(info[x]);
}
vector<int> calculate_costs(vector<int> W, vector<int> A, vector<int> B, vector<int> E)
{
    int n = A.size();
    info.resize(n);
    vals.resize(n);
    for (int i = 0;i < n;i++)
    {
        vals[i].a = A[i];
        vals[i].b = B[i];
        vals[i].w = W[i];
    }
    sort(all(vals), cmp);
    for (int i = 0;i < n;i++)
    {
        info[i].parent = i;
        info[i].max_index = i;
        info[i].max_value = vals[i].b - vals[i].a;
        info[i].sb = vals[i].b;
        info[i].size = 1;
        curr_res += vals[i].a;
    }
    int q = E.size();
    e.resize(q);
    for (int i = 0;i < q;i++)
    {
        e[i].first = E[i];
        e[i].second = i;
    }
    sort(all(e));
    vector<pair<int,int>> diff; // 
    for (int i = 0;i < n - 1;i++)
    {
        diff.push_back({vals[i + 1].w - vals[i].w, i});
    }
    sort(all(diff));
    vector<int> res(q);
    int e_index = 0;
    for (int i = 0;i < diff.size();i++)
    {
        if (diff[i].first <= e[e_index].first)
        {
            int a = diff[i].second;
            int b = diff[i].second + 1;
            onion(a,b);
        }
        else
        {
            res[e[e_index].second] = curr_res;
            e_index++;
            i--;
        }
    }
    for (e_index; e_index < q;e_index++)
    {
        res[e[e_index].second] = curr_res;
    }
    return res;
}

Compilation message

nile.cpp:32:1: warning: multi-line comment [-Wcomment]
   32 | //    /\_/\
      | ^
nile.cpp: In function 'std::vector<long int> calculate_costs(std::vector<long int>, std::vector<long int>, std::vector<long int>, std::vector<long int>)':
nile.cpp:150:22: warning: comparison of integer expressions of different signedness: 'int64_t' {aka 'long int'} and 'std::vector<std::pair<long int, long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  150 |     for (int i = 0;i < diff.size();i++)
      |                    ~~^~~~~~~~~~~~~
nile.cpp:165:10: warning: statement has no effect [-Wunused-value]
  165 |     for (e_index; e_index < q;e_index++)
      |          ^~~~~~~
/usr/bin/ld: /tmp/ccgZR2pj.o: in function `main':
grader.cpp:(.text.startup+0x300): undefined reference to `calculate_costs(std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status