#include "citymapping.h"
//#pragma GCC target ("avx2")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
#include <bits/stdc++.h>
#define owo(i,a, b) for(auto i=(a);i<(b); ++i)
#define uwu(i,a, b) for(auto i=(a)-1; i>=(b); --i)
#define senpai push_back
#define ttgl pair<int, int>
#define ayaya cout<<"ayaya~"<<endl
using namespace std;
/*#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
#define ordered_set tree<ttgl, null_type,less<ttgl>, rb_tree_tag,tree_order_statistics_node_update>*/
using ll = long long;
using ld = long double;
const ll MOD = 1000000007;
const ll root = 62;
ll gcd(ll a,ll b){return b?gcd(b,a%b):a;}
ll binpow(ll a,ll b){ll res=1;while(b){if(b&1)res=(res*a)%MOD;a=(a*a)%MOD;b>>=1;}return res;}
ll modInv(ll a){return binpow(a, MOD-2);}
const double PI = acos(-1);
const double eps = 1e-6;
const int INF = 0x3f3f3f3f;
const int NINF = 0xc0c0c0c0;
const ll INFLL = 0x3f3f3f3f3f3f3f3f;
const ll NINFLL = 0xc0c0c0c0c0c0c0c0;
const int mxN = 1001;
ll dist[mxN][mxN];
int sz[mxN];
int par[mxN];
int rt;
vector<pair<int, ll>> adj[mxN];
//ll get_distance(int a, int b) {return 0;}
ll qd(int a, int b) {
if(a==b)return 0;
if(dist[a][b])return dist[a][b];
return dist[a][b] = dist[b][a] = get_distance(a, b);
}
int find(int u) {
if(adj[u].size()==0)return u;
int mx = 0;
int cc = 0;
for(auto v: adj[u]) {
if(sz[v.first] > mx) {
mx = sz[v.first];
cc = v.first;
}
}
return cc;
}
int solve(int u, int res, ll w) {
if(adj[u].size()==0)return u;
int bot = find(u);
int nxt = bot;
ll path = qd(res, nxt);
while(qd(u, bot) + w < qd(u, nxt)*2 + path) {
nxt = par[nxt];
}
if(adj[nxt].size()<=1)return nxt;
return solve(adj[nxt][0].first, res, w - qd(u, adj[nxt][0].first));
}
int n;
void find_roads(int N, int Q, int* a, int* b, int* w) {
n = N;
int mxd = 0;
owo(i, 1, n+1) {
if(qd(i, 1) > mxd) {
mxd = qd(i, 1);
rt = i;
}
}
sz[rt] = 1;
vector<pair<ll, int>> all;
owo(i, 1, n+1) {
if(i^rt) {
all.senpai({qd(i, rt), i});
}
}
sort(all.begin(), all.end());
for(auto p: all) {
par[p.second] = solve(rt, p.second, p.first);
adj[par[p.second]].senpai({p.second, p.first - qd(par[p.second], rt)});
int up = p.second;
while(up) {
sz[p.second]++;
sort(adj[up].begin(), adj[up].end(), [&](pair<int, ll> a, pair<int, ll> b) {
return sz[a.first] < sz[b.second];
});
dist[up][p.second] = dist[p.second][up] = qd(rt, p.second) - qd(rt, up);
up = par[up];
}
}
int cnt = 0;
owo(i, 1, n+1) {
for(auto p: adj[i]) {
a[cnt] = i;
b[cnt] = p.first;
w[cnt++] = p.second;
}
}
}
int main() {
//freopen("file.in", "r", stdin);
//freopen("file.out", "w", stdout);
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
cin.tie(0)->sync_with_stdio(0);
return 0;
}
Compilation message
citymapping.cpp:3: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
3 | #pragma GCC optimization ("O3")
|
citymapping.cpp:4: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
4 | #pragma GCC optimization ("unroll-loops")
|
/tmp/ccJ0moVl.o: In function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'
/tmp/cccroZ8H.o:citymapping.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status
