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QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#851301#602. 最小费用最大流(随机数据)Coder-Osman100 ✓816ms4512kbC++142.0kb2025-01-10 17:23:402025-01-10 17:23:40

Judging History

你现在查看的是最新测评结果

  • [2025-01-10 17:23:40]
  • 评测
  • 测评结果:100
  • 用时:816ms
  • 内存:4512kb
  • [2025-01-10 17:23:40]
  • 提交

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;
}

Details

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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"