This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pii = pair<int, int>;
#define pb push_back
#define ff first
#define ss second
#define ins insert
#define arr3 array<int, 3>
const int inf = 1e9 + 5;
const int N = 5e2;
struct ST{
vector<vector<pii>> g;
vector<pii> ed;
vector<int> gd;
int n, m, A;
bool type;
ST(int ns, int ms){
n = ns;
m = ms;
g.resize(n + 1);
ed.resize(m + 1);
}
void set_mini(){
A = m + 1;
type = 1;
}
void set_maxi(){
A = 0;
type = 0;
}
int f(int x, int y){
if (type){
return min(x, y);
}
return max(x, y);
}
vector<pii> st;
bool ind;
void dfs(int v, int pr, int pre, int& t){
if (ind) return;
st.pb({v, pre});
if (v == t){
ind = 1;
return;
}
for (auto [i, j]: g[v]){
if (i == pr) continue;
dfs(i, v, j, t);
}
if (ind) return;
st.pop_back();
}
void add(int x, int y, int i){
ed[i] = {x, y};
st.clear();
ind = 0;
dfs(x, 0, A, y);
if (st.size() > 1){
int mn = A;
for (auto [j, ii]: st) mn = f(mn, ii);
auto [u, v] = ed[mn];
gd.erase(find(gd.begin(), gd.end(), mn));
for (int i = 0; i < g[u].size(); i++){
if (g[u][i].ff == v){
g[u].erase(g[u].begin() + i);
break;
}
}
for (int i = 0; i < g[v].size(); i++){
if (g[v][i].ff == u){
g[v].erase(g[v].begin() + i);
break;
}
}
}
g[x].pb({y, i});
g[y].pb({x, i});
gd.pb(i);
}
void clear(){
for (int i = 1; i <= n; i++){
g[i].clear();
}
ed.clear();
gd.clear();
}
};
struct dsu{
int sz[N + 1], p[N + 1], n;
ll W;
dsu(int ns){
n = ns;
}
int get(int v){
if (p[v] != v){
p[v] = get(p[v]);
}
return p[v];
}
void unite(int x, int y, int w){
x = get(x); y = get(y);
if (x == y) return;
if (sz[x] > sz[y]) swap(x, y);
p[x] = y;
sz[y] += sz[x];
W += w;
}
void clear(){
for (int i = 1; i <= n; i++){
p[i] = i;
sz[i] = 1;
}
W = 0;
}
};
int main(){
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
int n, m; cin>>n>>m;
vector<arr3> ed = {{0, 0, 0}};
for (int i = 1; i <= m; i++){
int a, b, w; cin>>a>>b>>w;
ed.pb({a, b, w});
}
ed.pb({0, 0, inf});
auto cmp = [&](arr3& x, arr3& y){
return x[2] < y[2];
};
sort(ed.begin(), ed.end(), cmp);
vector<int> actl[m + 2];
ST T1(n, m);
T1.set_mini();
for (int i = 1; i <= m; i++){
T1.add(ed[i][0], ed[i][1], i);
actl[i] = T1.gd;
reverse(actl[i].begin(), actl[i].end());
}
T1.clear();
T1.set_maxi();
vector<int> actr[m + 2];
for (int i = m; i > 0; i--){
T1.add(ed[i][0], ed[i][1], i);
actr[i] = T1.gd;
reverse(actr[i].begin(), actr[i].end());
}
int q; cin>>q;
vector<pii> qs;
for (int i = 1; i <= q; i++){
int x; cin>>x;
qs.pb({x, i});
}
sort(qs.begin(), qs.end());
vector<ll> out(q + 1);
int j1 = 0;
dsu T(n);
for (int i = 0; i <= m; i++){
vector<int>& edg1 = actl[i], edg2 = actr[i + 1];
int l = ed[i][2], r = ed[i + 1][2] - 1;
int j2 = j1;
while (j2 < qs.size() && l <= qs[j2].ff && qs[j2].ff <= r){
j2++;
}
while (j1 < j2){
int x = qs[j1].ff;
int i1 = 0, i2 = 0;
T.clear();
while (i1 < edg1.size() || i2 < edg2.size()){
if (i1 == edg1.size()){
int j = edg2[i2];
T.unite(ed[j][0], ed[j][1], abs(ed[j][2] - x));
i2++;
continue;
}
if (i2 == edg2.size()){
int j = edg1[i1];
T.unite(ed[j][0], ed[j][1], abs(ed[j][2] - x));
i1++;
continue;
}
int v1 = abs(ed[edg1[i1]][2] - x);
int v2 = abs(ed[edg2[i2]][2] - x);
if (v1 < v2){
int j = edg1[i1];
T.unite(ed[j][0], ed[j][1], v1);
i1++;
}
else {
int j = edg2[i2];
T.unite(ed[j][0], ed[j][1], v2);
i2++;
}
}
out[qs[j1].ss] = T.W;
j1++;
}
}
for (int i = 1; i <= q; i++) cout<<out[i]<<"\n";
}
Compilation message (stderr)
reconstruction.cpp: In member function 'void ST::add(int, int, int)':
reconstruction.cpp:65:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
65 | for (int i = 0; i < g[u].size(); i++){
| ~~^~~~~~~~~~~~~
reconstruction.cpp:71:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
71 | for (int i = 0; i < g[v].size(); i++){
| ~~^~~~~~~~~~~~~
reconstruction.cpp: In function 'int main()':
reconstruction.cpp:172:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
172 | while (j2 < qs.size() && l <= qs[j2].ff && qs[j2].ff <= r){
| ~~~^~~~~~~~~~~
reconstruction.cpp:179:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
179 | while (i1 < edg1.size() || i2 < edg2.size()){
| ~~~^~~~~~~~~~~~~
reconstruction.cpp:179:43: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
179 | while (i1 < edg1.size() || i2 < edg2.size()){
| ~~~^~~~~~~~~~~~~
reconstruction.cpp:180:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
180 | if (i1 == edg1.size()){
| ~~~^~~~~~~~~~~~~~
reconstruction.cpp:186:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
186 | if (i2 == edg2.size()){
| ~~~^~~~~~~~~~~~~~
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