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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 |
---|---|---|---|---|---|---|---|---|---|
#179078 | #6894. Circuit | PPP# | AC ✓ | 894ms | 7220kb | C++17 | 2.1kb | 2023-09-14 17:36:54 | 2023-09-14 17:36:55 |
Judging History
answer
#ifdef DEBUG
//#define _GLIBCXX_DEBUG
#endif
//#pragma GCC optimize("O3")
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
//const ll mod = 1000000007;
const ll mod = 998244353;
#define X first
#define Y second
ll pew(ll a, ll b)
{
ll res = 1;
while (b>0)
{
if (b&1) res = res*a%mod;
b >>= 1;
a = a*a%mod;
}
return res;
}
void solve()
{
ll n, m;
cin >> n >> m;
vector<vector<pair<ll,ll>>> g(n);
for (ll i=0;i<m;i++)
{
ll u, v, c;
cin >> u >> v >> c;
u--, v--;
g[u].push_back({v,c});
}
ll mn = mod*mod, C = 0;
for (int i=0;i<n;i++)
{
vector<ll> d(n,mod*mod), cnt(n);
for (int j=0;j<g[i].size();j++)
{
int v = g[i][j].X, c = g[i][j].Y;
if (v>=i) d[v] = c, cnt[v] = 1;
}
vector<int> was(n);
for (int w=0;w<n-i;w++)
{
int p = -1;
for (int u=i;u<n;u++)
{
if (was[u]==1) continue;
if (p==-1 or d[u]<d[p]) p = u;
}
was[p] = 1;
if (p==i)
{
if (d[i]==mod*mod) continue;
if (mn>d[i]) mn = d[i], C = 0;
if (d[i]==mn) C = (C+cnt[i])%mod;
}
for (int j=0;j<g[p].size();j++)
{
int v = g[p][j].X;
if (v<i) continue;
ll D = d[p]+g[p][j].Y;
if (d[v]>D)
{
d[v] = D, cnt[v] = 0;
}
if (d[v]==D) cnt[v] = (cnt[v]+cnt[p])%mod;
}
}
}
if (mn==mod*mod) cout << -1 << " " << -1 << "\n";
else cout << mn << " " << C << "\n";
}
int main() {
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
//#ifdef DEBUG
//freopen("input.txt", "r", stdin);
//#endif
int T = 1;
cin >> T;
while (T--) solve();
return 0;
}
詳細信息
Test #1:
score: 100
Accepted
time: 894ms
memory: 7220kb
input:
13 3 4 1 2 4 2 1 3 2 3 2 3 1 1 10 12 1 2 1 2 3 1 3 4 1 4 1 1 4 5 1 5 6 1 6 7 1 7 4 1 3 8 1 8 9 1 9 10 1 10 3 1 2 1 1 2 1 12 20 1 2 3 2 1 3 1 3 2 3 2 1 1 4 1 4 5 1 5 2 1 1 6 1 6 2 2 1 7 1 7 2 2 1 8 1 8 2 2 1 9 1 9 2 2 2 10 1 10 1 2 2 11 1 11 12 1 12 1 1 500 249500 1 2 1 1 3 2 1 4 3 1 5 4 1 6 5 1 7 6 ...
output:
7 2 4 3 -1 -1 6 21 500 616118143 1002500000 124750 566 124750 2 124750 -1 -1 500098704 2 8500 207839182 116655401 5046 500000000000 1
result:
ok 13 lines