#include <bits/stdc++.h>
using namespace std;
template<typename t> void umax(t &a, t b) {a = max(a, b);}
template<typename t> void umin(t &a, t b) {a = min(a, b);}
const int N = 105;
int n, m, C, k, z;
int sqr(int x) { return x * x; }
struct pnt {
int x, y;
int operator* (const pnt &f) const {
return sqr(x - f.x) + sqr(y - f.y);
}
};
void operator>> (istream &a, pnt &b) { a >> b.x >> b.y; }
pnt u[N], s[N];
int line[N];
struct e {
int u, v, c, f;
};
vector<e> ed;
vector<e*> g[3 * N];
void add_edge(int u, int v, int c) {
ed.push_back({u, v, c, 0});
ed.push_back({v, u, 0, 0});
}
int d[N], p[3 * N];
bool bfs() {
memset(d, 127, z << 2);
d[0] = 0;
queue<int> q;
q.push(0);
for(; !q.empty(); q.pop()) {
int v = q.front();
for(e *t : g[v]) {
if(t->f == t->c) continue;
int u = t->v;
if(d[u] <= d[v] + 1) continue;
d[u] = d[v] + 1;
q.push(u);
}
}
return d[z - 1] < 1e9;
}
int flow(int v) {
if(v == z - 1) return 1;
for(int &it = p[v]; it != g[v].size(); ++it) {
e *t = g[v][it];
if(d[t->v] != d[v] + 1) continue;
if(t->c == t->f) continue;
if(flow(t->v)) {
t->f++;
ed[1 ^ (t - &ed[0])].f--;
return 1;
}
}
return 0;
}
int dinic() {
int ans = 0;
while(true) {
if(!bfs()) break;
memset(p, 0, z << 2);
while(flow(0)) ++ans;
}
return ans;
}
bool works(int d) {
z = n + k + 2;
ed.resize(0);
for(int i = 0; i < n; ++i)
add_edge(0, i + 1, 1);
set<int> w[n];
for(int i = 0; i < n; ++i)
for(int j = 0; j < m; ++j)
if(u[i] * s[j] <= d)
w[i].insert(line[j] + n + 1);
for(int i = 0; i < n; ++i)
for(int j : w[i])
add_edge(i + 1, j, 1);
for(int i = 0; i < k; ++i)
add_edge(i + n + 1, z - 1, C);
for(int i = 0; i < z; ++i)
g[i].resize(0);
for(e &t : ed) g[t.u].push_back(&t);
return dinic() == n;
}
void solve() {
cin >> n >> m >> C >> k;
for(int i = 0; i < n; ++i) cin >> u[i];
for(int i = 0; i < m; ++i) cin >> s[i];
for(int i = 0; i < k; ++i) {
int v; cin >> v;
while(v--) { int u; cin >> u; line[--u] = i; }
}
vector<int> d;
for(int i = 0; i < n; ++i)
for(int j = 0; j < m; ++j)
d.push_back(u[i] * s[j]);
sort(d.begin(), d.end());
d.resize(unique(d.begin(), d.end()) - d.begin());
int l = 0, r = d.size() - 1;
if(!works(d.back())) {
cout << "-1\n";
return;
}
while(l < r) {
int m = l + r >> 1;
works(d[m])
? r = m
: l = m + 1;
}
cout << d[l] << endl;
int ans[n];
memset(ans, -1, n << 2);
for(e &t : ed) {
if(t.c != t.f) continue;
if(t.u > 0 && t.u <= n && t.v > n) {
ans[t.u - 1] = t.v - n;
}
}
for(int i : ans) cout << i << '\n';
}
signed main() {
#ifdef _LOCAL
freopen("in.txt", "r", stdin);
int t; cin >> t;
for(int i = 1; i <= t; ++i) {
cerr << "case #" << i << endl;
solve();
cerr << endl;
}
#else
ios::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
solve();
#endif
}
Compilation message
priglvaci.cpp: In function 'int flow(int)':
priglvaci.cpp:60:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int &it = p[v]; it != g[v].size(); ++it) {
~~~^~~~~~~~~~~~~~
priglvaci.cpp: In function 'void solve()':
priglvaci.cpp:124:19: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
int m = l + r >> 1;
~~^~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
9 ms |
1668 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 2 |
Runtime error |
8 ms |
1408 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 3 |
Runtime error |
9 ms |
1672 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 4 |
Runtime error |
11 ms |
2440 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 5 |
Runtime error |
13 ms |
2172 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 6 |
Runtime error |
9 ms |
1672 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 7 |
Runtime error |
8 ms |
1024 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 8 |
Failed |
7 ms |
640 KB |
there exists a bus with more than C students |
| 9 |
Runtime error |
9 ms |
1800 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 10 |
Runtime error |
9 ms |
1152 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
