QOJ.ac
QOJ
ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
---|---|---|---|---|---|---|---|---|---|
#851301 | #602. 最小费用最大流(随机数据) | Coder-Osman | 100 ✓ | 816ms | 4512kb | C++14 | 2.0kb | 2025-01-10 17:23:40 | 2025-01-10 17:23:40 |
Judging History
answer
#include <iostream>
#include <cstdio>
#include <algorithm>
#include <cstring>
#include <vector>
#include <queue>
#define int long long
#define endl '\n'
#define lson 2*i
#define rson 2*i+1
#define debug(x) cerr << #x << " = " << x << "\n";
#define debug2(l,r) cerr << "[" #l "," #r "] = [" << l << "," << r << "]\n";
#define debug3(x,y,z) cerr << "{" #x "," #y "," #z "} = " << "{" << x << "," << y << "," << z << "}\n";
#define debugv(v) cerr << #v": size= " << v.size() << "\nelement: " ; for(auto p:v) cout << p << " ";
using namespace std;
const int N = 455, M = 15055, MOD = 1e9 + 7, INF = 1e18;
int n, m, s, t, head[N], cur[N], d[N], vis[N], cnt = 1, maxf, minc;
struct edge {
int x, w, c, nxt;
} e[M * 2];
void add(int x, int y, int w, int c) {
e[++cnt] = {y, w, c, head[x]};
head[x] = cnt;
}
struct node {
int x, y;
node() {}
node(int _x, int _y) : x(_x), y(_y) {}
};
queue<node> q;
bool bfs() {
for (int i = 1; i <= n; i++)
d[i] = INF, vis[i] = 0;
q.push({s, 0}), d[s] = 0;
while (!q.empty()) {
int x = q.front().x, y = q.front().y;
q.pop();
if (y != d[x]) continue;
cur[x] = head[x];
for (int i = head[x]; i; i = e[i].nxt) {
int u = e[i].x, w = e[i].w, c = e[i].c;
if (w && c + d[x] < d[u]) {
d[u] = d[x] + c;
q.push({u, d[u]});
}
}
}
return d[t] < INF;
}
int dfs(int x, int flow) {
if (!flow || x == t) return flow;
vis[x] = true;
int sum = 0, f;
for (int i = cur[x]; i && flow; i = e[i].nxt) {
cur[x] = i;
int u = e[i].x, w = e[i].w, c = e[i].c;
if (!vis[u] && d[u] == d[x] + c && (f = dfs(u, min(flow, w)))) {
e[i].w -= f, e[i ^ 1].w += f;
flow -= f, minc += f * c, sum += f;
}
}
vis[x] = false;
return sum;
}
signed main() {
cin.tie(0), ios_base::sync_with_stdio(false);
cin >> n >> m;
s = 1, t = n;
for (int i = 1, x, y, w, c; i <= m; i++) {
cin >> x >> y >> w >> c;
add(x, y, w, c), add(y, x, 0, -c);
}
while (bfs()) maxf += dfs(s, INF);
cout << maxf << ' ' << minc << endl;
return 0;
}
详细
Pretests
Final Tests
Test #1:
score: 10
Accepted
time: 0ms
memory: 3848kb
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: 3600kb
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: 3896kb
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: 22ms
memory: 3992kb
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: 91ms
memory: 3860kb
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: 87ms
memory: 4148kb
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: 83ms
memory: 3860kb
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: 691ms
memory: 4332kb
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: 816ms
memory: 4344kb
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: 781ms
memory: 4512kb
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"