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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#532735#602. 最小费用最大流(随机数据)lycc100 ✓583ms4796kbC++142.8kb2024-08-25 10:42:432024-08-25 10:42:43

Judging History

你现在查看的是最新测评结果

  • [2024-08-25 10:42:43]
  • 评测
  • 测评结果:100
  • 用时:583ms
  • 内存:4796kb
  • [2024-08-25 10:42:43]
  • 提交

answer

// Author: lycc
// Problem: #102. 最小费用流
// Contest: LibreOJ
// URL: https://loj.ac/p/102
// Memory Limit: 256 MB
// Time Limit: 4000 ms
// 
// NOIp 2024 rp++
// 
// 2024 Grand Master

#include<bits/stdc++.h>
#define int long long
#define lb lower_bound
#define ub upper_bound
#define fi first
#define se second
#define pb emplace_back
#define For(i, x, y) for (int i = (x); i <= (y); i++)
#define rep(i, x, y) for (int i = (x); i >= (y); i--)
#define pii pair<int, int>
#define all(v) v.begin(), v.end()
#define sz(v) (int)(v.size())
#define ull unsigned long long
#define uint unsigned int
#define ls (p << 1)
#define rs (p << 1 | 1)
#define mp make_pair
#define i128 __int128
#define db long double
#define vi vector<int>
using namespace std;
mt19937_64 rnd(time(0));
template< typename T > void cmin(T &x, T y) { return x = min(x, y), void(); }
template< typename T > void cmax(T &x, T y) { return x = max(x, y), void(); }
int ksm(int x, int y, int p) {
    int v = 1; x %= p;
    while (y) v = 1ll * v * ((y & 1) ? x : 1) % p, x = 1ll * x * x % p, y >>= 1;
    return (v % p + p) % p;
}
bool MemoryST;
const int N = 405, M = 3e4 + 5;
const int mod = 998244353;
const long long INF = 1e18;
int n, m, s, t, tot = 1;
int d[N], head[N], ver[M], nex[M], w[M], cur[N], cost[M];
int minn = 0;
void add(int x, int y, int z, int c) {
	ver[++tot] = y; nex[tot] = head[x]; head[x] = tot; w[tot] = z; cost[tot] = c; return;
}
bool flag[N], vis[N];
bool bfs() {
	For (i, 1, n) d[i] = INF, cur[i] = head[i];
	d[s] = 0; queue<int> qu; qu.push(s);
	while (!qu.empty()) {
		int x = qu.front(); qu.pop(); flag[x] = 0;
		for (int i = head[x]; i; i = nex[i]) {
			int y = ver[i];
			if (w[i] && d[y] > d[x] + cost[i]) {
				d[y] = d[x] + cost[i];
				if (!flag[y]) qu.push(y), flag[y] = 1;
			}
		}
	}
	return d[t] < INF;
}
int dinic(int x, int flow) {
	if (x == t) return flow;
	vis[x] = 1;
	int now = flow;
	for (int i = cur[x]; i; i = nex[i]) {
		cur[x] = i; int y = ver[i];
		if (!vis[y] && d[y] == d[x] + cost[i] && w[i]) {
			int v = dinic(y, min(w[i], now));
			now -= v; w[i] -= v; w[i ^ 1] += v; minn += cost[i] * v;
			if (!now) break;
		}
	}
	vis[x] = 0;
	return flow - now;
}
void solve() {
	cin >> n >> m; s = 1; t = n;
	For (i, 1, m) {
		int x, y, z, c; cin >> x >> y >> z >> c;
		add(x, y, z, c); add(y, x, 0, -c);
	}
	int ans = 0;
	while (bfs()) ans += dinic(s, INF);
	cout << ans << ' ' << minn;
	return;
}
bool MemoryED;
signed main() {
    ios::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    cerr << fixed << setprecision(6) << (&MemoryST - &MemoryED) / 1048576.0 << "MB\n";
    int TESTCNT = 1;
    //cin >> TESTCNT;
    while (TESTCNT--) solve();
    cerr << endl << 1e3 * clock() / CLOCKS_PER_SEC << "ms"; 
    return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Pretests


Final Tests

Test #1:

score: 10
Accepted
time: 1ms
memory: 4148kb

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: 3944kb

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: 3932kb

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: 14ms
memory: 4100kb

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: 58ms
memory: 4412kb

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: 55ms
memory: 4264kb

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: 55ms
memory: 4200kb

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: 493ms
memory: 4668kb

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: 583ms
memory: 4572kb

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: 550ms
memory: 4796kb

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"