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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#482718 | #602. 最小费用最大流(随机数据) | KellyWLJ | 100 ✓ | 402ms | 4428kb | C++17 | 2.5kb | 2024-07-17 20:52:56 | 2024-07-17 20:52:56 |
Judging History
answer
#include <bits/stdc++.h>
#define fi first
#define se second
#define pb push_back
using namespace std;
using ll = long long;
using pii = pair<int, int>;
const ll N = 410, M = 40010, inf = 1e15, SZ = (1 << 18) + 5;
static char buf[SZ], *bgn = buf, *til = buf;
char getc()
{
if(bgn == til) bgn = buf, til = buf + fread(buf, 1, SZ, stdin);
return bgn == til ? EOF : *bgn++;
}
template<typename T>
void read(T &x)
{
char ch = getc(); T fh = 0; x = 0;
while(ch < '0' || ch > '9') fh |= (ch == '-'), ch = getc();
while(ch >= '0' && ch <= '9') x = x * 10 + ch - '0', ch = getc();
x = fh ? -x : x;
}
template<typename Type, typename... argc>
void read(Type &x, argc &...args) {read(x), read(args...);}
int n, m, S, T, u, v, up, cnt[N], book[N], vis[N], st[N], idx = 1;
ll cost[M], dis[N], del[N], ci, ans, sum, e[M];
vector<pii> edge[N];
void add(int u, int v, ll d, ll w)
{
e[++idx] = d, cost[idx] = w, edge[u].pb({v, idx});
e[++idx] = 0, cost[idx] = -w, edge[v].pb({u, idx});
}
int spfa()
{
memset(dis, 0x3f, sizeof(dis)), memset(book, 0, sizeof(book));
memset(st, 0, sizeof(st)), memset(cnt, 0, sizeof(cnt)), memset(vis, 0, sizeof(vis));
queue<int> q; q.push(S), dis[S] = 0;
while(!q.empty())
{
int x = q.front(); q.pop();
book[x] = 0, ++cnt[x];
if(cnt[x] > n + 1) {cerr << "!"; exit(0);}
for(auto [y, i] : edge[x])
if(e[i] > 0 && dis[y] > dis[x] + cost[i])
{
dis[y] = dis[x] + cost[i];
if(!book[y]) q.push(y), book[y] = 1;
}
}
return dis[T] < inf ? 1 : 2;
}
ll dinic(int x, ll flow)
{
if(x == T || !flow) return flow;
ll res = flow; vis[x] = 1;
for(int j = st[x]; j < edge[x].size(); ++j)
{
st[x] = j; auto [y, i] = edge[x][j];
if(e[i] > 0 && !vis[y] && dis[y] == dis[x] + cost[i])
{
int k = dinic(y, min(res, e[i]));
if(k > 0) e[i] -= k, e[i ^ 1] += k, res -= k, sum += cost[i] * k;
else dis[y] = inf;
}
}
vis[x] = 0; return flow - res;
}
int main()
{
#ifdef Kelly
freopen("in.txt", "r", stdin);
freopen("out.txt", "w", stdout);
freopen("err.txt", "w", stderr);
#endif
read(n, m), S = 1, T = n;
for(int i = 1; i <= m; ++i)
{
read(u, v, up, ci);
add(u, v, up, ci);
}
while(spfa() == 1) ans += dinic(S, inf);
cout << ans << " " << sum << "\n";
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 10
Accepted
time: 0ms
memory: 3692kb
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: 3656kb
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: 3612kb
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: 10ms
memory: 3800kb
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: 40ms
memory: 3900kb
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: 39ms
memory: 3968kb
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: 38ms
memory: 4172kb
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: 334ms
memory: 4360kb
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: 402ms
memory: 4428kb
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: 357ms
memory: 4424kb
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"