//CEOI '16 P1
//Problem: ICC
//Link: https://oj.uz/problem/view/CEOI16_icc
#include <bits/stdc++.h>
#include "icc.h"
using namespace std;
#define lg long long
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, child[i].push_back(i);
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++)
{
int a[child[parents[i]].size()], b[child[parents[j]].size()];
for(int k = 0; k < child[parents[i]].size(); k++)
{
a[k] = child[parents[i]][k];
}
for(int k = 0; k < child[parents[j]].size(); k++)
{
b[k] = child[parents[j]][k];
}
bool flag = query(parents[i], parents[j], a, b);
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:43:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
43 | for(int i = 0; i < parents.size() && cur; i++)
| ~~^~~~~~~~~~~~~~~~
icc.cpp:45:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
45 | for(int j = i+1; j < parents.size() && cur; j++)
| ~~^~~~~~~~~~~~~~~~
icc.cpp:48:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
48 | for(int k = 0; k < child[parents[i]].size(); k++)
| ~~^~~~~~~~~~~~~~~~~~~~~~~~~~
icc.cpp:52:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
52 | for(int k = 0; k < child[parents[j]].size(); k++)
| ~~^~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/bin/ld: /tmp/ccavBSt9.o: in function `main':
grader.cpp:(.text.startup+0x17): undefined reference to `run'
collect2: error: ld returned 1 exit status
