记录编号 |
395947 |
评测结果 |
AAAAAAAAAA |
题目名称 |
[网络流24题] 运输问题 |
最终得分 |
100 |
用户昵称 |
kZime |
是否通过 |
通过 |
代码语言 |
C++ |
运行时间 |
0.019 s |
提交时间 |
2017-04-17 17:15:23 |
内存使用 |
1.58 MiB |
显示代码纯文本
#include <bits/stdc++.h>
#define MAXN 233
#define inf 0x7fffffff
using namespace std;
inline int get_num() {
int k = 0;
char c = getchar();
for(; !isdigit(c); c = getchar());
for(; isdigit(c); c = getchar()) k = k * 10 + c - '0';
return k;
}
class edge{
public:
int fr, to, ne, v, w, vbk;// w是费用,v是流量
edge() {;}
inline edge(int fr_, int to_, int ne_, int v_, int w_) {
fr = fr_, to = to_, ne = ne_, v = v_, w = w_;
vbk = v_;
}
}e[MAXN *(3 + MAXN)];
int cnt, head[MAXN * 3];
inline void addedge(int fr, int to, int w, int v) {
e[cnt++] = edge(fr, to, head[fr], v, w), head[fr] = cnt - 1;
e[cnt++] = edge(to, fr, head[to], 0, -w), head[to] = cnt - 1;
}
int n, m, a[MAXN], b[MAXN], s, t;
bool inq[MAXN];
int dis[MAXN], pth[MAXN];
inline bool bfs() {
memset(inq, 0, sizeof(inq));
memset(dis, 0x7f, sizeof(dis));
memset(pth, -1, sizeof(pth));
queue <int> q;
q.push(s);
inq[s] = 1;
dis[s] = 0;
while(!q.empty()) {
int x = q.front();
q.pop();
inq[x] = 0;
for(int i = head[x]; ~i; i = e[i].ne) {
int y = e[i].to;
int z = e[i].w;
if(dis[y] > dis[x] + z && e[i].v > 0) {
dis[y] = dis[x] + z;
pth[y] = i;
if(!inq[y]) {
q.push(y);
inq[y] = 1;
}
}
}
}
if(~pth[t]) return 1;
else return 0;
}
inline int get_flow() {
int now = pth[t];
int mf = inf;
while(~now) {
mf = min(mf, e[now].v);
now = pth[e[now].fr];
}
now = pth[t];
while(~now) {
e[now].v -= mf;
e[now ^ 1].v += mf;
now = pth[e[now].fr];
}
return mf;
}
int main() {
/*#ifdef DEBUG*/
//freopen("in.txt", "r", stdin);
/*#endif*/
freopen("tran.in", "r", stdin);
freopen("tran.out", "w", stdout);
memset(head, -1, sizeof(head));
m = get_num();
n = get_num();
s = 0;
t = n + m + 1;
for(int i = 1; i <= m; i++) {
a[i] = get_num();
addedge(s, i, 0, a[i]);
}
for(int i = 1; i <= n; i++) {
b[i] = get_num();
addedge(i + m, t, 0, b[i]);
}
for(int i = 1; i <= m; i++) {
for(int j = 1; j <= n; j++) {
addedge(i, m + j, get_num(), inf);
}
}
int ans = 0;
while(bfs()) {
ans += get_flow() * dis[t];
}
printf("%d\n", ans);
for(int i = 0; i < cnt; i++) {
e[i].v = e[i].vbk;
e[i].w = -1 * e[i].w;
}
ans = 0;
while(bfs()) {
ans += get_flow() * dis[t];
}
printf("%d", -1 * ans);
}