Submission #858000

#	Time	Username	Problem	Language	Result	Execution time	Memory
858000		sofijavelkovska	The Potion of Great Power (CEOI20_potion)	C++14	Compilation error	0 ms	0 KiB

potion

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

const int INF=1e9;

int n, d, u;
vector<int> h, a, b;

void init(int N, int D, vector<int> H)
{
    n=N;
    d=D;
    h=H;

    return;
}

void curseChanges(int U, vector<int> A, vector<int> B)
{
    u=U;
    a=A;
    b=B;

    return;
}

int question(int x, int y, int v)
{
    set<int> xtrust, ytrust;
    for (int i=0; i<v; i++)
    {
        if (a[i]==x)
        {
            if (!xtrust.count(b[i]))
                xtrust.insert(b[i]);
            else
                xtrust.erase(b[i]);
        }
        if (b[i]==x)
        {
            if (!xtrust.count(a[i]))
                xtrust.insert(a[i]);
            else
                xtrust.erase(a[i]);
        }
        if (a[i]==y)
        {
            if (!ytrust.count(b[i]))
                ytrust.insert(b[i]);
            else
                ytrust.erase(b[i]);
        }
        if (b[i]==y)
        {
            if (!ytrust.count(a[i]))
                ytrust.insert(a[i]);
            else
                ytrust.erase(a[i]);
        }
    }
    vector<int> vx, vy;
    for (auto t : xtrust)
        vx.push_back(h[t]);
    for (auto t : ytrust)
        vy.push_back(h[t]);
    sort(vx.begin(), vx.end());
    sort(vy.begin(), vy.end());
    if (vx.empty() || vy.empty())
        return INF;
    int mind=INF;
    int j=0;
    for (int i=0; i<vx.size(); i++)
    {
        while (j<vy.size() && vx[i]>vy[j])
            j=j+1;
        if (j<vy.size())
            mind=min(mind, vy[j]-vx[i]);
        if (j-1>=0)
            mind=min(mind, vx[i]-vy[j-1]);
    }

    return mind;
}

/*int main()
{
    init(6, 5, { 2 , 42 , 1000 , 54 , 68 , 234 } );
    curseChanges(11, { 0 , 2 , 3 , 3 , 3 , 1 , 5 , 0 , 3 , 1 , 3 } ,
                     { 1 , 0 , 4 , 5 , 5 , 3 , 3 , 5 , 0 , 3 , 5 } ) ;
    while (true)
    {
        int x, y, v;
        cin >> x >> y >> v;
        cout << question(x, y, v) << '\n';
    }

    return 0;
}*/

Compilation message (stderr)

potion.cpp: In function 'int question(int, int, int)':
potion.cpp:72:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   72 |     for (int i=0; i<vx.size(); i++)
      |                   ~^~~~~~~~~~
potion.cpp:74:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   74 |         while (j<vy.size() && vx[i]>vy[j])
      |                ~^~~~~~~~~~
potion.cpp:76:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   76 |         if (j<vy.size())
      |             ~^~~~~~~~~~
/usr/bin/ld: /tmp/ccaoZiUx.o: in function `main':
grader.cpp:(.text.startup+0xec): undefined reference to `init(int, int, int*)'
/usr/bin/ld: grader.cpp:(.text.startup+0x184): undefined reference to `curseChanges(int, int*, int*)'
collect2: error: ld returned 1 exit status