#include<bits/stdc++.h>
using namespace std;
const long long inf = (long long) 1e18 + 10;
const int inf1 = (int) 1e9 + 10;
#define int long long
#define dbl long double
#define endl '\n'
#define sc second
#define fr first
#define mp make_pair
#define pb push_back
#define all(x) x.begin(), x.end()
const int maxn = 220;
int n, m, ds[maxn], dsz[maxn], mark[10010];
pair<int,pair<int,int>> ans;
vector<pair<pair<int,int>,pair<int,int>>> edg;
vector<pair<int,int>> ansv;
int find(int u) {
if(u == ds[u]) return u;
return ds[u] = find(ds[u]);
}
void join(int u, int v) {
if(dsz[u] < dsz[v]) swap(u,v);
dsz[u]+= dsz[v];
ds[v] = u;
}
pair<int,int> mst(dbl c1, dbl t1) {
for(int i = 1; i <= n; i++) {
ds[i] = i;
dsz[i] = 1;
}
for(int i = 1; i <= m; i++) mark[i] = 0;
int C = 0;
int T = 0;
vector<pair<int,int>> curv;
while(curv.size() != n-1) {
pair<dbl,int> cur = mp(inf,inf);
for(int i = 0; i < edg.size(); i++) {
int u = find(edg[i].fr.fr);
int v = find(edg[i].fr.sc);
if(u == v || mark[i]) {
mark[i] = 1;
continue;
}
int c = edg[i].sc.fr;
int t = edg[i].sc.sc;
cur = min(cur,mp(c1*c+t1*t,i));
}
int id = cur.sc;
mark[id] = true;
int u = find(edg[id].fr.fr);
int v = find(edg[id].fr.sc);
int c = edg[id].sc.fr;
int t = edg[id].sc.sc;
if(u != v) {
join(u,v);
curv.pb(mp(edg[id].fr.fr,edg[id].fr.sc));
C+= c;
T+= t;
}
}
if(ans.fr > C*T) {
ans.fr = C*T;
ans.sc = mp(C,T);
ansv = curv;
}
// cout << " " << c1 << " " << t1 << " " << C << " " << T << endl;
return mp(C,T);
}
void dec(int cl, int tl, int cr, int tr) {
// cout << cl << " " << tl << " " << cr << " " << tr << endl;
int dc = cr-cl; // > 0
int dt = tr-tl; // < 0
dbl sz = sqrt(dc*dc + dt*dt);
auto aux = mst(dt/sz,-dc/sz);
int c = aux.fr;
int t = aux.sc;
if(c == cl || c == cr) return;
dec(cl,tl,c,t);
dec(c,t,cr,tr);
}
void solve() {
cin >> n >> m;
for(int i = 1; i <= m; i++) {
int u,v,c,t; cin >> u >> v >> c >> t;
u++;
v++;
edg.pb(mp(mp(u,v),mp(c,t)));
}
ans.fr = inf;
pair<int,int> aux;
aux = mst(0,1);
int c0 = aux.fr;
int t0 = aux.sc;
aux = mst(1,0);
int c1 = aux.fr;
int t1 = aux.sc;
dec(c0,t0,c1,t1);
cout << ans.sc.fr << " " << ans.sc.sc << endl;
for(auto x : ansv) {
cout << x.fr-1 << " " << x.sc-1 << endl;
}
}
int32_t main() {
ios::sync_with_stdio(false); cin.tie(0);
// freopen("in.in", "r", stdin);
// freopen("out.out", "w", stdout);
int tt = 1;
// cin >> tt;
while(tt--) {
solve();
}
}
Compilation message
timeismoney.cpp: In function 'std::pair<long long int, long long int> mst(long double, long double)':
timeismoney.cpp:42:23: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
42 | while(curv.size() != n-1) {
| ~~~~~~~~~~~~^~~~~~
timeismoney.cpp:44:26: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<std::pair<long long int, long long int>, std::pair<long long int, long long int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
44 | for(int i = 0; i < edg.size(); i++) {
| ~~^~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
2 ms |
468 KB |
Execution killed with signal 7 |
| 2 |
Correct |
0 ms |
212 KB |
Output is correct |
| 3 |
Correct |
1 ms |
212 KB |
Output is correct |
| 4 |
Correct |
1 ms |
212 KB |
Output is correct |
| 5 |
Correct |
4 ms |
340 KB |
Output is correct |
| 6 |
Correct |
5 ms |
340 KB |
Output is correct |
| 7 |
Correct |
34 ms |
468 KB |
Output is correct |
| 8 |
Correct |
195 ms |
984 KB |
Output is correct |
| 9 |
Incorrect |
0 ms |
212 KB |
Output isn't correct |
| 10 |
Correct |
1 ms |
212 KB |
Output is correct |
| 11 |
Correct |
1 ms |
212 KB |
Output is correct |
| 12 |
Correct |
2 ms |
340 KB |
Output is correct |
| 13 |
Incorrect |
3 ms |
384 KB |
Output isn't correct |
| 14 |
Correct |
122 ms |
340 KB |
Output is correct |
| 15 |
Correct |
127 ms |
340 KB |
Output is correct |
| 16 |
Execution timed out |
2083 ms |
468 KB |
Time limit exceeded |
| 17 |
Execution timed out |
2091 ms |
468 KB |
Time limit exceeded |
| 18 |
Execution timed out |
2085 ms |
468 KB |
Time limit exceeded |
| 19 |
Execution timed out |
2052 ms |
984 KB |
Time limit exceeded |
| 20 |
Execution timed out |
2039 ms |
984 KB |
Time limit exceeded |
