이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#ifndef LOCAL
#define cerr if(false)cerr
#endif
const ll MAX_N = 1e4 + 10;
ll n, m;
pair<ll, pair<ll, ll> > edg[MAX_N];
struct {
ll par[MAX_N], sz[MAX_N];
vector<ll> now;
void reset() {
for(ll i = 1; i <= n; i ++) {
par[i] = i;
sz[i] = 1;
}
now.resize(0);
}
ll find(ll x) {
if(par[x] == x) {
return x;
} else {
return par[x] = find(par[x]);
}
}
void merge(ll x, ll y, ll c) {
x = find(x); y = find(y);
if(x == y) { return; }
if(sz[x] < sz[y]) { swap(x, y); }
par[y] = x;
sz[x] += sz[y];
now.push_back(c);
}
} dsu;
vector<ll> cand[MAX_N];
signed main() {
ios_base::sync_with_stdio(false); cin.tie(NULL);
cin >> n >> m;
for(ll i = 0; i < m; i ++) {
cin >> edg[i].second.first >> edg[i].second.second >> edg[i].first;
edg[m + i] = edg[i];
}
sort(edg, edg + m);
sort(edg + m, edg + 2 * m);
reverse(edg + m, edg + 2 * m);
m = 2 * m;
dsu.reset();
for(ll i = 0; i < m; i ++) {
dsu.reset();
dsu.merge(edg[i].second.first, edg[i].second.second, i);
if(i != 0) for(const auto j : cand[i - 1]) {
dsu.merge(edg[j].second.first, edg[j].second.second, j);
}
cand[i] = dsu.now;
}
ll q;
cin >> q;
while(q --) {
ll x;
cin >> x;
ll ans = 1e18;
for(ll i = 0; i < m; i ++) {
if(cand[i].size() != n - 1) { continue; }
ll curr = 0;
for(const auto j : cand[i]) {
curr += abs(edg[j].first - x);
}
ans = min(ans, curr);
}
cout << ans << endl;
}
}
컴파일 시 표준 에러 (stderr) 메시지
reconstruction.cpp: In function 'int main()':
reconstruction.cpp:76:22: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare]
76 | if(cand[i].size() != n - 1) { continue; }
| ~~~~~~~~~~~~~~~^~~~~~~~
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