QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#919532 | #602. 最小费用最大流(随机数据) | jiamengtong# | 100 ✓ | 991ms | 6116kb | C++14 | 1.7kb | 2025-02-28 11:12:38 | 2025-02-28 11:12:38 |
Judging History
answer
#include<bits/stdc++.h>
#define N 405
#define M 15005
#define int long long
using namespace std;
int n, m, head[N], tot = 1, cur[N], ret, vis[N], dis[N], seq[20000005], L, R, mk[N];
struct edge{
int to, cap, cst, nxt;
}e[M << 1];
void add(int x, int y, int z, int w)
{
e[++tot] = {y, z, w, head[x]};
head[x] = tot;
e[++tot] = {x, 0, -w, head[y]};
head[y] = tot;
}
bool SPFA()
{
memset(vis, 0, sizeof(vis));
memset(dis, 0x3f, sizeof(dis));
dis[1] = 0;
L = R = 0;
seq[++R] = 1;
while(L < R)
{
int x = seq[++L];
vis[x] = 0;
for(int i = head[x]; ~i; i = e[i].nxt)
{
if(e[i].cap && dis[e[i].to] > dis[x] + e[i].cst)
{
dis[e[i].to] = dis[x] + e[i].cst;
if(!vis[e[i].to]) vis[e[i].to] = 1, seq[++R] = e[i].to;
}
}
}
return (dis[n] <= 1e15);
}
int dfs(int x, int fl)
{
if(x == n && fl) return fl;
// cout << x << " " << fl << endl;
int rm = fl;
mk[x] = 1;
for(int &i = cur[x]; ~i && rm; i = e[i].nxt)
{
// cout << i << endl;
if(!mk[e[i].to] && dis[e[i].to] == dis[x] + e[i].cst && e[i].cap)
{
int Flow = dfs(e[i].to, min(rm, e[i].cap));
if(Flow) ret += e[i].cst * Flow, e[i].cap -= Flow, e[i ^ 1].cap += Flow, rm -= Flow;
}
}
mk[x] = 0;
return fl - rm;
}
void Dinic()
{
int ans = 0;
while(SPFA())
{
// cout << dis[n] << endl;
for(int i = 1; i <= n; i++) cur[i] = head[i];
while(1)
{
int w = dfs(1, 1e18);
if(!w) break;
ans += w;
// cout << ans << " " << ret << endl;
}
}
printf("%lld %lld\n", ans, ret);
}
signed main()
{
memset(head, -1, sizeof(head));
scanf("%lld%lld", &n, &m);
for(int i = 1, x, y, z, w; i <= m; i++) scanf("%lld%lld%lld%lld", &x, &y, &z, &w), add(x, y, z, w);
Dinic();
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Pretests
Final Tests
Test #1:
score: 10
Accepted
time: 1ms
memory: 3840kb
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: 3840kb
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: 0ms
memory: 5988kb
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: 26ms
memory: 6108kb
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: 116ms
memory: 4096kb
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: 115ms
memory: 4096kb
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: 111ms
memory: 6116kb
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: 848ms
memory: 4480kb
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: 991ms
memory: 4608kb
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: 916ms
memory: 4608kb
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"