//CEOI '16 P1
//Problem: ICC
//Link: https://oj.uz/problem/view/CEOI16_icc
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#pragma GCC optimize("Ofast")
using namespace std;
using namespace __gnu_pbds;
#define lg long long
#define ordered_set tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update>
#define fastio ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define error(args...) { string _s = #args; replace(_s.begin(), _s.end(), ',', ' '); stringstream _ss(_s); istream_iterator<string> _it(_ss); err(_it, args);
#define endl \n
#define lbound(x, y) lower_bound(x.begin(), x.end(), y)
#define ubound(x, y) upper_bound(x.begin(), x.end(), y)
#define sortasc(v) sort(v.begin(), v.end())
#define sortdesc(v) sort(v.rbegin(), v.rend())
#define custom_array(a,l, r) int _##a[r-l+1]; int*a=_##a-l;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const lg MOD = 1e9+7, N = 101, M = 1e7+1, SZ = 1e3+1;
lg par[N], compSize[N];
vector<lg> child[N];
lg getParent(lg src)
{
if(src == par[src]) return src;
return par[src] = getParent(par[src]);
}
void join(lg u, lg v)
{
u = getParent(u), v = getParent(v);
if(u == v) return;
if(compSize[u] > compSize[v]) swap(u, v);
par[u] = v;
for(auto it : child[u]) child[v].push_back(it);
compSize[v] += compSize[u];
}
void run(lg n)
{
for(int i = 1; i <= n; i++) par[i] = i, compSize[i] = 1;
lg x = n-1;
while(x--)
{
vector<lg> parents;
for(int i = 1; i <= n; i++) if(par[i] == i) parents.push_back(i);
bool cur = true;
for(int i = 0; i < parents.size() && cur; i++)
{
for(int j = i+1; j < parents.size() && cur; j++)
{
bool flag = query(parents[i], parents[j], child[parents[i]], child[parents[j]]);
if(flag)
{
join(parents[i], parents[j]);
setRoad(parents[i], parents[j]);
cur = false;
break;
}
}
}
}
return;
}
Compilation message
icc.cpp: In function 'void run(long long int)':
icc.cpp:56:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
56 | for(int i = 0; i < parents.size() && cur; i++)
| ~~^~~~~~~~~~~~~~~~
icc.cpp:58:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
58 | for(int j = i+1; j < parents.size() && cur; j++)
| ~~^~~~~~~~~~~~~~~~
icc.cpp:60:17: error: 'query' was not declared in this scope
60 | bool flag = query(parents[i], parents[j], child[parents[i]], child[parents[j]]);
| ^~~~~
icc.cpp:64:6: error: 'setRoad' was not declared in this scope
64 | setRoad(parents[i], parents[j]);
| ^~~~~~~
