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南陽劉子驥 / OI Codes

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p1343.cpp 1.54 KB
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南陽劉子驥 提交于 2022-06-15 14:11 . 20220615
#include<bits/stdc++.h>
using namespace std;
const int N = 10010, M = 200010, INF = 1e8;
int n, m, S, T;
int h[N], e[M], f[M], ne[M], idx;
int q[N], d[N], cur[N];
void add(int a, int b, int c)
{
e[idx] = b, f[idx] = c, ne[idx] = h[a], h[a] = idx++;
e[idx] = a, f[idx] = 0, ne[idx] = h[b], h[b] = idx++;
}
bool bfs()
{
int hh = 0, tt = 0;
memset(d, -1, sizeof d);
q[0] = S, d[S] = 0, cur[S] = h[S];
while(hh <= tt)
{
int t = q[hh++];
for(int i = h[t]; ~i; i = ne[i])
{
int ver = e[i];
if(d[ver] == -1 && f[i])
{
d[ver] = d[t] + 1;
cur[ver] = h[ver];
if(ver == T) return true;
q[++tt] = ver;
}
}
}
return false;
}
int find(int u, int limit)
{
if(u == T) return limit;
int flow = 0;
for(int i = cur[u]; ~i && flow < limit; i = ne[i])
{
cur[u] = i;
int ver = e[i];
if(d[ver] == d[u] + 1 && f[i])
{
int t = find(ver, min(f[i], limit - flow));
if(!t) d[ver] = -1;
f[i] -= t, f[i ^ 1] += t, flow += t;
}
}
return flow;
}
int dinic()
{
int r = 0, flow;
while(bfs()) while(flow = find(S, INF)) r += flow;
return r;
}
int main()
{
int x;
scanf("%d%d%d", &n, &m, &x);
memset(h, -1, sizeof h);
S = 0, T = n + 1;
add(S, 1, INF);
add(n, T, INF);
for(int i = 1; i <= m; i++)
{
int a, b, c;
scanf("%d%d%d", &a, &b, &c);
add(a, b, c);
}
int y = dinic();
if((y == 0) && (x >= y))
{
puts("Orz Ni Jinan Saint Cow!");
return 0;
}
printf("%d %d\n", y, (x % y == 0) ? x / y : ( int )(x / y) + 1);
return 0;
}
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