QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#642514 | #602. 最小费用最大流(随机数据) | cxqghzj | 100 ✓ | 547ms | 8464kb | C++14 | 3.0kb | 2024-10-15 14:42:31 | 2024-10-15 14:42:32 |
Judging History
answer
#include <iostream>
#include <algorithm>
#include <cstdio>
#include <array>
#include <queue>
#include <bitset>
#define ll long long
#define pii pair <int, int>
using namespace std;
#ifdef ONLINE_JUDGE
#define getchar() (p1 == p2 && (p2 = (p1 = buf) + fread(buf, 1, 1 << 21, stdin), p1 == p2) ? EOF : *p1++)
char buf[1 << 23], *p1 = buf, *p2 = buf, ubuf[1 << 23], *u = ubuf;
#endif
int read() {
int p = 0, flg = 1;
char c = getchar();
while (c < '0' || c > '9') {
if (c == '-') flg = -1;
c = getchar();
}
while (c >= '0' && c <= '9') {
p = p * 10 + c - '0';
c = getchar();
}
return p * flg;
}
void write(ll x) {
if (x < 0) {
x = -x;
putchar('-');
}
if (x > 9) {
write(x / 10);
}
putchar(x % 10 + '0');
}
bool _stmer;
#define fi first
#define se second
const int N = 405, M = 3e4 + 5;
const ll inf = 2e18;
namespace G {
array <int, N> fir;
array <int, M> nex, to, len, cap;
int cnt = 1;
void add(int x, int y, int z, int w) {
cnt++;
nex[cnt] = fir[x];
to[cnt] = y;
cap[cnt] = z;
len[cnt] = w;
fir[x] = cnt;
}
void _add(int x, int y, int z, int w) { add(x, y, z, w), add(y, x, 0, -w); }
} //namespace G
namespace Mfl {
array <ll, N> dis;
array <int, N> cur;
bitset <N> vis;
queue <int> q;
bool spfa(pii st) {
q.push(st.fi);
dis.fill(inf), dis[st.fi] = 0, vis[st.fi] = 1;
while (!q.empty()) {
int u = q.front();
q.pop();
vis[u] = 0;
for (int i = G::fir[u]; i; i = G::nex[i]) {
if (!G::cap[i] || dis[G::to[i]] <= dis[u] + G::len[i]) continue;
dis[G::to[i]] = dis[u] + G::len[i];
if (!vis[G::to[i]])
q.push(G::to[i]), vis[G::to[i]] = 1;
}
}
return dis[st.se] != inf;
}
ll dfs(int x, ll augcd, pii st) {
if (x == st.se) return augcd;
ll augc = augcd;
vis[x] = 1;
for (int &i = cur[x]; i; i = G::nex[i]) {
ll flow = G::cap[i];
if (!flow || vis[G::to[i]] || dis[G::to[i]] != dis[x] + G::len[i]) continue;
ll del = dfs(G::to[i], min(flow, augc), st);
augc -= del;
G::cap[i] -= del, G::cap[i ^ 1] += del;
if (!augc) break;
}
vis[x] = 0;
return augcd - augc;
}
pii dinic(pii st) {
pii ans(0, 0);
while (spfa(st)) {
copy(G::fir.begin(), G::fir.end(), cur.begin());
vis = 0;
ll flow = dfs(st.fi, inf, st);
ans.fi += flow, ans.se += flow * dis[st.se];
}
return ans;
}
} //namespace Mfl
bool _edmer;
int main() {
cerr << (&_stmer - &_edmer) / 1024.0 / 1024.0 << "MB\n";
int n = read(), m = read();
pii st(1, n), ans(0, 0);
for (int i = 1; i <= m; i++) {
int x = read(), y = read(), z = read(), w = read();
G::_add(x, y, z, w);
}
ans = Mfl::dinic(st);
write(ans.fi), putchar(32);
write(ans.se), puts("");
return 0;
}
Details
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Pretests
Final Tests
Test #1:
score: 10
Accepted
time: 1ms
memory: 5868kb
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: 5868kb
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: 6016kb
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: 6160kb
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: 59ms
memory: 6024kb
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: 56ms
memory: 6024kb
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: 51ms
memory: 6052kb
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: 470ms
memory: 8464kb
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: 547ms
memory: 6188kb
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: 526ms
memory: 8336kb
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"