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QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#44625#602. 最小费用最大流(随机数据)CCPSDCGK#100 ✓852ms3984kbC++232.8kb2022-08-20 14:23:482022-08-20 14:23:50

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 14:23:50]
  • 评测
  • 测评结果:100
  • 用时:852ms
  • 内存:3984kb
  • [2022-08-20 14:23:48]
  • 提交

answer

#include<map>
#include<set>
#include<queue>
#include<deque>
#include<cmath>
#include<ctime>
#include<bitset>
#include<vector>
#include<cstdio>
#include<string>
#include<random>
#include<cassert>
#include<cstdlib>
#include<cstring>
#include<iostream>
#include<algorithm>
#include<unordered_map>
using namespace std;
using ll=long long;
using uint=unsigned int;
using ull=unsigned long long;
#define endl '\n'
#define lb lower_bound
#define ub upper_bound
#define eb emplace_back
#define fs fflush(stdout)
#define ump unordered_map
#define pq priority_queue
#define clz __builtin_clz
#define ctz __builtin_ctz
#define sz(x) (int)x.size()
#define np next_permutation
#define clzl __builtin_clzll
#define ctzl __builtin_ctzll
#define ppc __builtin_popcount
#define all(x) x.begin(),x.end()
#define ppcl __builtin_popcountll
#define fpi(x) freopen(x,"r",stdin)
#define fpo(x) freopen(x,"w",stdout)
#define uid uniform_int_distribution
#define urd uniform_real_distribution
#define me(x,y) memset(x,y,sizeof(x))
#define dbg(x) cerr<<"In Line "<<__LINE__<<' '<<#x<<'='<<(x)<<'\n'
#define gc p1==p2&&(p2=(p1=buf)+fread(buf,1,iosiz,stdin),p1==p2)?EOF:*p1++
#define iosiz 1024
char buf[iosiz],*p1=buf,*p2=buf;
template<class T> inline T &re(T &x){
	x=0;int f=1;char ch=gc;
	while(ch<48||ch>57){
		if(ch==45) f=-f;ch=gc;
	}
	while(ch>47&&ch<58) x=(x<<1)+(x<<3)+(ch^48),ch=gc;
	return x*=f;
}
#define mod 998244353
#define inf 0x3f3f3f3f
struct node{
    int to,flow,cost,nxt;
}edge[30005];
int tot=-1,n,head[405],dis[405],ans2;
bool vis[405];
inline void add(int u,int v,int w,int c){
    edge[++tot]={v,w,c,head[u]},head[u]=tot;
    edge[++tot]={u,0,-c,head[v]},head[v]=tot;
}
bool spfa(){
    queue<int> q;me(dis,0x3f),dis[1]=0,q.emplace(1),vis[1]=1;
    while(!q.empty()){
        int f=q.front();q.pop(),vis[f]=0;
        for(int i=head[f];~i;i=edge[i].nxt) if(edge[i].flow&&dis[edge[i].to]>dis[f]+edge[i].cost){
            dis[edge[i].to]=dis[f]+edge[i].cost;if(!vis[edge[i].to]) vis[edge[i].to]=1,q.emplace(edge[i].to);
        }
    }
    return dis[n]^inf;
}
int dfs(int u,int flow){
    if(u==n) return ans2+=dis[n]*flow,flow;
    int res=0;vis[u]=1;
    for(int i=head[u];~i;i=edge[i].nxt) if(dis[edge[i].to]==dis[u]+edge[i].cost&&edge[i].flow&&!vis[edge[i].to]){
        int ret=dfs(edge[i].to,min(flow,edge[i].flow));
        if(!ret){
            dis[edge[i].to]=inf;continue;
        }
        res+=ret,flow-=ret,edge[i].flow-=ret,edge[i^1].flow+=ret;
        if(!flow) return vis[u]=0,res;
    }return vis[u]=0,res;
}
int main(){
    #ifdef CCPSDCGK
    fpi("shuju.txt");
    #endif
    me(head,-1);
    re(n);int m=re(m),ans1=0;
    while(m--){
        int u=re(u),v=re(v),w=re(w),c=re(c);
        add(u,v,w,c);
    }
    while(spfa()) ans1+=dfs(1,2147483647);cout<<ans1<<' '<<ans2;
    return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 10
Accepted
time: 3ms
memory: 3648kb

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: 3580kb

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: 3ms
memory: 3524kb

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: 27ms
memory: 3724kb

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: 99ms
memory: 3636kb

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: 101ms
memory: 3788kb

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: 97ms
memory: 3780kb

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: 723ms
memory: 3848kb

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: 852ms
memory: 3984kb

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: 815ms
memory: 3912kb

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"