QOJ.ac

QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#714476#602. 最小费用最大流(随机数据)ucup-team902100 ✓385ms9892kbC++232.3kb2024-11-05 23:29:232024-11-05 23:29:23

Judging History

你现在查看的是最新测评结果

  • [2024-11-05 23:29:23]
  • 评测
  • 测评结果:100
  • 用时:385ms
  • 内存:9892kb
  • [2024-11-05 23:29:23]
  • 提交

answer

// luogu-judger-enable-o2
// luogu-judger-enable-o2
#include <bits/stdc++.h>
#define F(i, l, r) for(int i = (l), _end_ = (int)(r); i <= _end_; ++i)
#define f(i, r, l) for(int i = (r), _end_ = (int)(l); i >= _end_; --i)
#define Set(a, v) memset(a, v, sizeof(a))
#define file(a) freopen(a".in","r",stdin),freopen(a".out","w",stdout)
using namespace std;

bool chkmin(int &a, int b) {return b < a ? a = b, 1 : 0;}
bool chkmax(int &a, int b) {return b > a ? a = b, 1 : 0;}

inline int read() {
 int x = 0, fh = 1; char ch = getchar();
    for (; !isdigit(ch); ch = getchar() ) if (ch == '-') fh = -1;
    for (; isdigit(ch); ch = getchar() ) x = (x<<1) + (x<<3) + (ch ^ '0');
    return x * fh;
}
int n,m;
long long ans;
int s,t;
int he[5005],to[400005],ne[400005],w[400005],cost[400005],e=1;
int dis[5005];
int cur[5005];
int vis[5005];
void add(int x,int y,int z,int ww){
     to[++e]=y;
	 ne[e]=he[x];
	 he[x]=e;
	 cost[e]=ww;
	 w[e]=z;
}
bool bfs(){
     deque<int>q;
	 F(i,0,n)dis[i]=1e9;
	 Set(vis,0);
	 dis[t]=0;
//	 cerr<<dis[s]<<endl;
	 q.push_back(t);
	 while(!q.empty()){
	     int x=q.front();
		 q.pop_front();
		 for(int i=he[x];i;i=ne[i]){
		     int v=to[i];
			 if(dis[v]>dis[x]-cost[i]&&w[i^1]){
			    dis[v]=dis[x]-cost[i];
				if(!vis[v]){
					vis[v]=1;
				if(!q.empty()&&dis[v]<dis[q.front()])q.push_front(v);
				else q.push_back(v);
				}
			 }
		 }
		 vis[x]=0;
	 }
//	 cerr<<dis[s]<<endl;
	 return dis[s]<1e9;
}
inline int dfs(int u,int low){
   if(u==t){
      vis[t]=1;
      return low;
   }
   int res=0,a;
   vis[u]=1;
   for(int& i=cur[u];i;i=ne[i]){
      int v=to[i];
      if(!vis[v]&&w[i]&&dis[u]-cost[i]==dis[v]){
          a=dfs(v,min(w[i],low-res));
          if(a)ans+=a*cost[i],w[i]-=a,w[i^1]+=a,res+=a;
      }
      if(res==low)break;
   }
   return res;
}
int dinic(){
    int res=0,cnt;
	while(bfs()){
		vis[t]=1;
		//cerr<<++cnt<<endl;
		while(vis[t]){
		Set(vis,0);
		memcpy(cur,he,sizeof(cur));
	    res+=dfs(s,1e9);
		}
		//cerr<<res<<endl;
	}
	return res;
}
int main () {
#ifndef ONLINE_JUDGE
file("a");
#endif
	n=read();
	m=read();
    s=1;
	t=n;
	F(i,1,m){
	   int x=read(),y=read(),z=read(),ww=read();
	   add(x,y,z,ww);
	   add(y,x,0,-ww);
	}
	//cout<<e<<endl;
    printf("%d ",dinic());
	printf("%lld\n",ans);
    return 0;
}

Details

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Pretests


Final Tests

Test #1:

score: 10
Accepted
time: 1ms
memory: 7880kb

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: 9892kb

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: 8156kb

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: 15ms
memory: 8120kb

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: 54ms
memory: 7912kb

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: 52ms
memory: 7884kb

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: 50ms
memory: 7944kb

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: 333ms
memory: 7940kb

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: 385ms
memory: 8220kb

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: 365ms
memory: 8312kb

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"