QOJ.ac

QOJ

ID题目提交者结果用时内存语言文件大小提交时间测评时间
#789393#602. 最小费用最大流(随机数据)zhulexuan10 0ms3756kbC++144.3kb2024-11-27 20:09:492024-11-27 20:09:53

Judging History

你现在查看的是最新测评结果

  • [2024-11-27 20:09:53]
  • 评测
  • 测评结果:10
  • 用时:0ms
  • 内存:3756kb
  • [2024-11-27 20:09:49]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define inf INT_MAX
#define fr(i,l,r) for (i=(l); i<=(r); i++)
#define rfr(i,l,r) for (i=(l); i>=(r); i--)
template<typename T>inline void read(T &n){
    T w=1; n=0; char ch=getchar();
    while (!isdigit(ch) && ch!=EOF){ if (ch=='-') w=-1; ch=getchar(); }
    while (isdigit(ch) && ch!=EOF){ n=(n<<3)+(n<<1)+(ch&15); ch=getchar(); }
    n*=w;
}
template<typename T>inline void write(T x){
    if (x==0){ putchar('0'); return ; }
    T tmp;
    if (x>0) tmp=x;
    else tmp=-x;
    if (x<0) putchar('-');
    char F[105];
    long long cnt=0;
    while (tmp){
        F[++cnt]=tmp%10+48;
        tmp/=10;
    }
    while (cnt) putchar(F[cnt--]);
}
#define Min(x,y) x = min(x,y)
#define Max(x,y) x = max(x,y)
//基础配置=================================================================================
struct Cost_flow{
    #define N 405
    #define M 15005
    struct edge{
        ll x,y,w,c;
    };
    ll n,m,S,T;
    ll cnt,head[N]; edge e[M+M];
    ll nw[N]; bool vis[N];
    ll f[N],h[N];
    void init(ll _n){
        ll i;
        n = _n;
        cnt = 1;
        fr(i,0,n) head[i] = 0;
    }
    void Addedge(ll x,ll y,ll w,ll c){
        cnt++;
        e[cnt].x = head[x];
        e[cnt].y = y;
        e[cnt].w = w;
        e[cnt].c = c;
        head[x] = cnt;
    }
    void addedge(ll x,ll y,ll w,ll c){
        Addedge(x,y,w,c);
        Addedge(y,x,0,-c);
    }
    struct node{
        ll x,v;
        node(ll _x=0,ll _v=0){
            x = _x, v = _v;
        }
        bool operator < (const node o)const{
            return v>o.v;
        }
    };
    void spfa(ll x){
        ll i, go;
        bool vis[N]; memset(vis,false,sizeof(vis));
        queue<ll> q;
        memset(h,0x3f,sizeof(h)); h[x] = 0; q.push(x), vis[x] = true;
        while (!q.empty()){
            x = q.front(); q.pop();
            vis[x] = false;//printf("h[%lld] = %lld\n",x,h[x]);
            for (i=head[x]; i; i=e[i].x){
                go = e[i].y;
                if (e[i].w>0 && h[x]+e[i].c<h[go]){
                    h[go] = h[x]+e[i].c;
                    if (!vis[go]) q.push(go), vis[go] = true;
                }
            }
        }
    }
    bool dij(ll x){
        ll i, go;
        priority_queue<node> q;
        fr(i,0,n+1) f[i] = inf;
        f[x] = 0, q.push(node(x,0));
        while (!q.empty()){
            node p = q.top(); q.pop();
            ll x = p.x, v = p.v;
            if (v>f[x]) continue;
            // printf("f[%lld] = %lld\n",x,f[x]);
            for (i=head[x]; i; i=e[i].x){
                go = e[i].y;
                ll ev = h[x]+e[i].c - h[go];
                if (e[i].w>0 && v+ev<f[go]){
                    f[go] = v+ev;
                    q.push(node(go,f[go]));
                    if (go==T) return true;
                }
            }
        }
        return false;
        // return f[T]<inf;
    }
    ll dfs(ll x,ll flow){
        if (x==T) return flow;
        ll i, go, k, ans = 0;
        vis[x] = false;
        for (i=nw[x]; i && flow; i=e[i].x){
            go = e[i].y; nw[x] = i;
            if (e[i].w==0 || !vis[go] || h[x]+e[i].c!=h[go]) continue;
            k = dfs( go , min(flow,e[i].w) );
            ans += k, flow -= k;
            e[i].w -= k, e[i^1].w += k;
        }
        vis[x] = (ans>0);
        return ans;
    }
    pair<ll,ll> dinic(ll _S,ll _T){
        ll i, ans = 0, av = 0;
        S = _S, T = _T;
        // printf("dinic %lld %lld\n",S,T);
        spfa(S);
        // printf("h[T] = %lld\n",h[T]);
        while (dij(S)){
            fr(i,0,n) h[i] += f[i], nw[i] = head[i], vis[i] = true;
            // printf("h[T] = %lld\n",h[T]);
            ll k = dfs(S,inf);
            ans += k, av += h[T]*k;
        }
        return make_pair(ans,av);
    }
};
ll n,m,s,t;
Cost_flow flow;
int main(){
	// freopen("a.in","r",stdin);
//	freopen(".out","w",stdout);
    ll i;
    read(n); read(m);
    flow.init(n);
    fr(i,1,m){
        ll x,y,w,c;
        read(x); read(y); read(w); read(c);
        flow.addedge(x,y,w,c);
    }
    pair<ll,ll> ans = flow.dinic(1,n);
    printf("%lld %lld\n",ans.first,ans.second);
    return 0;
}
//g++ a.cpp -o a -Wall -Wl,--stack=512000000 -std=c++11 -O2

詳細信息


Pretests


Final Tests

Test #1:

score: 10
Accepted
time: 0ms
memory: 3756kb

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: 0
Time Limit Exceeded

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:


result:


Test #3:

score: 0
Time Limit Exceeded

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:


result:


Test #4:

score: 0
Time Limit Exceeded

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:


result:


Test #5:

score: 0
Time Limit Exceeded

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:


result:


Test #6:

score: 0
Time Limit Exceeded

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:


result:


Test #7:

score: 0
Time Limit Exceeded

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:


result:


Test #8:

score: 0
Time Limit Exceeded

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:


result:


Test #9:

score: 0
Time Limit Exceeded

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:


result:


Test #10:

score: 0
Time Limit Exceeded

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:


result: