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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#481315 | #602. 最小费用最大流(随机数据) | james1BadCreeper# | 0 | 0ms | 0kb | C++17 | 2.2kb | 2024-07-16 23:32:48 | 2024-07-16 23:32:49 |
answer
#include <bits/stdc++.h>
using namespace std;
const int N = 5e3 + 5;
struct Graph {
struct edge {
int u, v, w, c;
edge(int u = 0, int v = 0, int w = 0, int c = 0) :
u(u), v(v), w(w), c(c) {}
};
int n, m, s, t, cur[N], d[N];
bool inq[N];
vector<int> G[N];
vector<edge> edges;
inline void add(int u, int v, int w, int c) {
edges.emplace_back(u, v, w, c);
G[u].emplace_back(edges.size() - 1);
edges.emplace_back(v, u, 0, -c);
G[v].emplace_back(edges.size() - 1);
}
bool SPFA(void) {
memset(cur, 0, sizeof(cur));
memset(d, 0x3f, sizeof(d));
queue<int> q; q.push(s); d[s] = 0; inq[s] = 1;
while (!q.empty()) {
int u = q.front(); q.pop(); inq[u] = 0;
for (int i = 0; i < G[u].size(); ++i) {
edge &e = edges[G[u][i]];
if (e.w && d[e.v] > d[u] + e.c) {
d[e.v] = d[u] + e.c;
if (!inq[e.v]) q.push(e.v), inq[e.v] = 1;
}
}
}
return d[t] < 0x3f3f3f3f;
}
int cost, vis[N];
int dinic(int x, int res) {
if (x == t) return res;
int flow = 0; vis[x] = 1;
for (int i = cur[x]; i < G[x].size() && res; ++i) {
cur[x] = i; edge &e = edges[G[x][i]];
int c = min(res, e.w);
if (!vis[e.v] && c && d[e.v] == d[x] + e.c) {
int k = dinic(e.v, c);
flow += k; cost += k * e.c; res -= k;
e.w -= k; edges[G[x][i] ^ 1].w += k;
}
}
if (!flow) d[x] = 0x3f3f3f3f; vis[x] = 0;
return flow;
}
int maxflow, flow;
int MCMF(int S, int T) {
s = S; t = T; maxflow = 0;
while (SPFA()) while (flow = dinic(s, 1e9)) maxflow += flow;
return cost;
}
} G;
int n, m, s, t;
main(void) {
cin >> n >> m >> s >> t;
while (m--) {
int u, v, w, c; cin >> u >> v >> w >> c;
G.add(u, v, w, c);
}
int cost = G.MCMF(s, t);
cout << G.maxflow << " " << cost << "\n";
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 0
Runtime Error
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:
result:
Test #2:
score: 0
Runtime Error
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:
result:
Test #3:
score: 0
Runtime Error
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:
result:
Test #4:
score: 0
Runtime Error
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:
result:
Test #5:
score: 0
Runtime Error
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:
result:
Test #6:
score: 0
Runtime Error
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:
result:
Test #7:
score: 0
Runtime Error
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:
result:
Test #8:
score: 0
Runtime Error
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:
result:
Test #9:
score: 0
Runtime Error
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:
result:
Test #10:
score: 0
Runtime Error
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...