QOJ.ac

QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#44650#602. 最小费用最大流(随机数据)Remakee#100 ✓1069ms4208kbC++142.0kb2022-08-20 16:44:562022-08-20 16:44:59

Judging History

你现在查看的是最新测评结果

  • [2023-08-10 23:21:45]
  • System Update: QOJ starts to keep a history of the judgings of all the submissions.
  • [2022-08-20 16:44:59]
  • 评测
  • 测评结果:100
  • 用时:1069ms
  • 内存:4208kb
  • [2022-08-20 16:44:56]
  • 提交

answer

// Skyqwq
#include <bits/stdc++.h>

#define fi first
#define se second
#define mp make_pair
#define pb push_back

using namespace std;

typedef pair<int, int> PII;
typedef long long LL;

template <typename T> bool inline chkMin(T &x, T y) { return (y < x) ? x = y, 1 : 0; }
template <typename T> bool inline chkMax(T &x, T y) { return (y > x) ? x = y, 1 : 0; }

template <typename T> void inline read(T &x) {
	x = 0; int f = 1; char s = getchar();
	while (s > '9' || s < '0') { if (s == '-') f = -1; s = getchar(); }
	while (s <= '9' && s >= '0') x = x * 10 + s - '0', s = getchar();
	x *= f;
}

const int N = 405, M = 15005;
const LL INF = 0x3f3f3f3f3f3f3f3f;

int n, m, s, t;
LL h[N], d[N];

struct E{
	int next, v, w, c;
} e[M << 1];

int head[N], numE = 1;

void add(int u, int v, int w, int c) {
	e[++numE] = (E) { head[u], v, w , c};
	head[u] = numE;
}

void addE(int u, int v, int w, int c) {
	add(u, v, w, c), add(v, u, 0, -c);
}

int pre[N];

LL incf[N];

void upd() {
	int x = t;
	while (x != s) {
		int i = pre[x];
		e[i].w -= incf[t], e[i ^ 1].w += incf[t];
		x = e[i ^ 1].v;
	}
}

typedef pair<LL, int> PLI;

priority_queue<PLI, vector<PLI>, greater<PLI> > q;

bool vis[N];



bool dij() {
	memset(d, 0x3f, sizeof d);
	memset(vis, 0, sizeof vis);
	d[s] = 0;
	q.push(mp(0, s));
	incf[s] = INF;
	while (!q.empty()) {
		int u = q.top().se; q.pop();
		if (vis[u]) continue;
		vis[u] = 1;
		for (int i = head[u]; i ; i = e[i].next) {
			int v = e[i].v;
			if (e[i].w && chkMin(d[v], d[u] + h[u] + e[i].c - h[v])) {
				q.push(mp(d[v], v));
				incf[v] = min(incf[u], (LL)e[i].w);
				pre[v] = i;
			}
		}
	}
	return d[t] != INF;
}

int main() {
	read(n), read(m); s = 1, t = n;
	for (int i = 1; i <= m; i++) {
		int u, v, w, c; read(u), read(v), read(w), read(c);
		addE(u, v, w, c);
	}
	LL ans = 0, fl = 0;
	while (dij()) {
		for (int i = 1; i <= n; i++) h[i] += d[i];
		ans += h[n] * incf[n];
		fl += incf[n];
		upd();
	}
	printf("%lld %lld\n", fl, ans);
	return 0;
}



Details

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Test #1:

score: 10
Accepted
time: 2ms
memory: 3680kb

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: 2ms
memory: 3704kb

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: 2ms
memory: 3628kb

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: 41ms
memory: 3812kb

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: 140ms
memory: 3880kb

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: 139ms
memory: 3764kb

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: 141ms
memory: 3884kb

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: 1036ms
memory: 4208kb

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: 1069ms
memory: 4172kb

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: 1047ms
memory: 4072kb

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"