QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#686435 | #602. 最小费用最大流(随机数据) | gaga999 | 100 ✓ | 935ms | 4180kb | C++14 | 2.4kb | 2024-10-29 12:55:36 | 2024-10-29 12:55:37 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
#define pb emplace_back
#define iter(x) (x).begin(), (x).end()
#define size(x) (int)(x).size()
#define INF 0x3f3f3f3f
#define lowbit(x) ((x) & -(x))
#define tmin(a, b) (a) = min((a), (b))
#define tmax(a, b) (a) = max((a), (b))
typedef long long ll;
typedef pair<int, int> pii;
void db() { cerr << endl; }
template <class T, class... U>
void db(T a, U... b) { cerr << a << " ", db(b...); }
struct MCMF {
static const int N = 500, M = 4e4;
struct E {
int to, cap, co, nxt;
} eg[M];
int hd[N], cr[N], ct = 2, s = 0, t = 1, n, flow;
int dp[N], cost;
bool vd[N];
inline void ini(int _n) { n = _n; }
inline void addedge(int u, int v, int w, int c) {
eg[ct] = {v, w, c, hd[u]};
hd[u] = ct++;
eg[ct] = {u, 0, -c, hd[v]};
hd[v] = ct++;
}
bool spfa() {
queue<int> q;
memset(dp, INF, (n + 1) << 2);
q.push(s), vd[s] = 1, dp[s] = 0;
while (!q.empty()) {
int u = q.front();
q.pop(), vd[u] = 0;
for (int i = hd[u]; i; i = eg[i].nxt) {
const int v = eg[i].to, c = eg[i].co;
if (!eg[i].cap || dp[u] + c >= dp[v])
continue;
dp[v] = dp[u] + c;
if (!vd[v])
vd[v] = 1, q.push(v);
}
}
return dp[t] != INF;
}
int dfs(int u, int fl) {
if (u == t)
return fl;
int sm = 0;
vd[u] = 1;
for (int &i = cr[u]; i; i = eg[i].nxt) {
int &w = eg[i].cap, v = eg[i].to, c = eg[i].co;
if (!w || vd[v] || dp[u] + c != dp[v])
continue;
int tp = dfs(v, min(fl - sm, w));
w -= tp, eg[i ^ 1].cap += tp, sm += tp, cost += tp * c;
}
vd[u] = 0;
return sm;
}
pii getflow() {
flow = cost = 0;
while (spfa())
memcpy(cr, hd, (n + 1) << 2), flow += dfs(s, INF);
return pii(flow, cost);
}
} fw;
signed main() {
cin.tie(0)->sync_with_stdio(0);
int n, m, x, y, c, w;
cin >> n >> m;
fw.n = fw.t = n, fw.s = 1;
while (m-- && cin >> x >> y >> w >> c)
fw.addedge(x, y, w, c);
fw.getflow();
cout << fw.flow << ' ' << fw.cost << '\n';
}
Details
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Pretests
Final Tests
Test #1:
score: 10
Accepted
time: 1ms
memory: 3812kb
input:
8 27 2 3 2147483647 100 1 3 1 100 2 4 2147483647 10 1 4 1 10 2 4 2147483647 10 1 4 1 10 2 8 3 0 3 5 2147483647 100 1 5 1 100 3 8 1 0 3 2 2147483647 0 4 5 2147483647 10 1 5 1 10 4 8 1 0 4 2 2147483647 0 5 6 2147483647 1 1 6 1 1 5 6 2147483647 1 1 6 1 1 5 7 2147483647 1 1 7 1 1 5 8 3 0 5 2 2147483647 ...
output:
8 243
result:
ok 2 number(s): "8 243"
Test #2:
score: 10
Accepted
time: 0ms
memory: 3552kb
input:
12 49 2 10 2147483647 5 1 10 1 5 2 5 2147483647 50 1 5 1 50 2 9 2147483647 8 1 9 1 8 2 8 2147483647 47 1 8 1 47 2 11 2147483647 17 1 11 1 17 2 12 5 0 3 12 0 0 3 2 2147483647 0 4 6 2147483647 18 1 6 1 18 4 11 2147483647 12 1 11 1 12 4 9 2147483647 14 1 9 1 14 4 12 3 0 4 2 2147483647 0 5 11 2147483647...
output:
15 436
result:
ok 2 number(s): "15 436"
Test #3:
score: 10
Accepted
time: 1ms
memory: 3628kb
input:
27 169 2 15 2147483647 24 1 15 1 24 2 19 2147483647 96 1 19 1 96 2 12 2147483647 49 1 12 1 49 2 13 2147483647 75 1 13 1 75 2 24 2147483647 2 1 24 1 2 2 27 5 0 3 27 0 0 3 2 2147483647 0 4 11 2147483647 99 1 11 1 99 4 3 2147483647 85 1 3 1 85 4 27 2 0 4 2 2147483647 0 5 27 0 0 5 2 2147483647 0 6 9 214...
output:
60 4338
result:
ok 2 number(s): "60 4338"
Test #4:
score: 10
Accepted
time: 24ms
memory: 3916kb
input:
77 2149 2 42 2147483647 33 1 42 1 33 2 68 2147483647 30 1 68 1 30 2 76 2147483647 13 1 76 1 13 2 51 2147483647 93 1 51 1 93 2 12 2147483647 39 1 12 1 39 2 57 2147483647 74 1 57 1 74 2 70 2147483647 21 1 70 1 21 2 73 2147483647 24 1 73 1 24 2 52 2147483647 54 1 52 1 54 2 15 2147483647 99 1 15 1 99 2 ...
output:
1000 74606
result:
ok 2 number(s): "1000 74606"
Test #5:
score: 10
Accepted
time: 111ms
memory: 3784kb
input:
102 4199 2 48 2147483647 42 1 48 1 42 2 85 2147483647 50 1 85 1 50 2 22 2147483647 83 1 22 1 83 2 95 2147483647 97 1 95 1 97 2 82 2147483647 34 1 82 1 34 2 25 2147483647 72 1 25 1 72 2 4 2147483647 17 1 4 1 17 2 47 2147483647 10 1 47 1 10 2 71 2147483647 12 1 71 1 12 2 68 2147483647 39 1 68 1 39 2 2...
output:
2000 161420
result:
ok 2 number(s): "2000 161420"
Test #6:
score: 10
Accepted
time: 107ms
memory: 3628kb
input:
102 4199 2 79 2147483647 13 1 79 1 13 2 83 2147483647 73 1 83 1 73 2 75 2147483647 90 1 75 1 90 2 30 2147483647 92 1 30 1 92 2 54 2147483647 25 1 54 1 25 2 66 2147483647 53 1 66 1 53 2 52 2147483647 37 1 52 1 37 2 63 2147483647 46 1 63 1 46 2 11 2147483647 20 1 11 1 20 2 55 2147483647 53 1 55 1 53 2...
output:
2000 143072
result:
ok 2 number(s): "2000 143072"
Test #7:
score: 10
Accepted
time: 104ms
memory: 3748kb
input:
102 4199 2 39 2147483647 45 1 39 1 45 2 51 2147483647 11 1 51 1 11 2 86 2147483647 63 1 86 1 63 2 23 2147483647 46 1 23 1 46 2 48 2147483647 63 1 48 1 63 2 87 2147483647 8 1 87 1 8 2 73 2147483647 63 1 73 1 63 2 5 2147483647 52 1 5 1 52 2 80 2147483647 21 1 80 1 21 2 31 2147483647 44 1 31 1 44 2 101...
output:
2000 146132
result:
ok 2 number(s): "2000 146132"
Test #8:
score: 10
Accepted
time: 791ms
memory: 3904kb
input:
302 10599 2 72 2147483647 169 1 72 1 169 2 260 2147483647 165 1 260 1 165 2 12 2147483647 108 1 12 1 108 2 16 2147483647 26 1 16 1 26 2 28 2147483647 148 1 28 1 148 2 7 2147483647 74 1 7 1 74 2 139 2147483647 199 1 139 1 199 2 231 2147483647 9 1 231 1 9 2 287 2147483647 123 1 287 1 123 2 135 2147483...
output:
5000 1106316
result:
ok 2 number(s): "5000 1106316"
Test #9:
score: 10
Accepted
time: 935ms
memory: 4180kb
input:
302 10599 2 222 2147483647 132 1 222 1 132 2 17 2147483647 7 1 17 1 7 2 177 2147483647 253 1 177 1 253 2 90 2147483647 195 1 90 1 195 2 128 2147483647 289 1 128 1 289 2 42 2147483647 193 1 42 1 193 2 213 2147483647 133 1 213 1 133 2 263 2147483647 293 1 263 1 293 2 50 2147483647 155 1 50 1 155 2 228...
output:
5000 1290871
result:
ok 2 number(s): "5000 1290871"
Test #10:
score: 10
Accepted
time: 850ms
memory: 3892kb
input:
302 10599 2 176 2147483647 289 1 176 1 289 2 190 2147483647 99 1 190 1 99 2 10 2147483647 96 1 10 1 96 2 240 2147483647 165 1 240 1 165 2 273 2147483647 205 1 273 1 205 2 248 2147483647 194 1 248 1 194 2 220 2147483647 122 1 220 1 122 2 194 2147483647 167 1 194 1 167 2 8 2147483647 67 1 8 1 67 2 227...
output:
5000 1395897
result:
ok 2 number(s): "5000 1395897"