結果
| 問題 |
No.2712 Play more!
|
| ユーザー |
👑 |
| 提出日時 | 2024-03-31 14:29:22 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 2,640 bytes |
| コンパイル時間 | 4,080 ms |
| コンパイル使用メモリ | 256,068 KB |
| 最終ジャッジ日時 | 2025-02-20 17:15:29 |
|
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 31 WA * 2 |
ソースコード
#include<bits/stdc++.h>
#include<atcoder/all>
#define rep(i,n) for(int i=0;i<n;i++)
using namespace std;
using namespace atcoder;
typedef long long ll;
typedef vector<int> vi;
typedef vector<long long> vl;
typedef vector<vector<int>> vvi;
typedef vector<vector<long long>> vvl;
typedef long double ld;
typedef pair<int, int> P;
ostream& operator<<(ostream& os, const modint& a) {os << a.val(); return os;}
template <int m> ostream& operator<<(ostream& os, const static_modint<m>& a) {os << a.val(); return os;}
template <int m> ostream& operator<<(ostream& os, const dynamic_modint<m>& a) {os << a.val(); return os;}
template<typename T> istream& operator>>(istream& is, vector<T>& v){int n = v.size(); assert(n > 0); rep(i, n) is >> v[i]; return is;}
template<typename U, typename T> ostream& operator<<(ostream& os, const pair<U, T>& p){os << p.first << ' ' << p.second; return os;}
template<typename T> ostream& operator<<(ostream& os, const vector<T>& v){int n = v.size(); rep(i, n) os << v[i] << (i == n - 1 ? "\n" : " "); return os;}
template<typename T> ostream& operator<<(ostream& os, const vector<vector<T>>& v){int n = v.size(); rep(i, n) os << v[i] << (i == n - 1 ? "\n" : ""); return os;}
template<typename T> void chmin(T& a, T b){a = min(a, b);}
template<typename T> void chmax(T& a, T b){a = max(a, b);}
long long const INF = 1001001001001001001;
template<typename T>
struct Edge{
T cost;
int from, to;
bool operator<(const Edge<T>& right) const{
return this->cost < right.cost;
}
};
template<typename T>
struct BellmanFord{
bool initialized;
int n;
int m;
vector<T> dist;
vector<Edge<T>> G;
BellmanFord(int _n) : initialized(false), n(_n), m(0), dist(_n, INF) {}
void add_edge(int from, int to, T cost){
G.push_back((Edge<T>){cost, from, to});
m++;
}
void init(int start){
initialized = true;
sort(G.begin(), G.end());
dist[start] = 0;
rep(time, n + 5){
bool change = false;
rep(i, m){
auto e = G[i];
if(dist[e.from] + e.cost < dist[e.to]){
dist[e.to] = dist[e.from] + e.cost;
change = true;
}
}
if(!change) break;
if(change) if(time > n){
rep(i, n) dist[i] = -INF;
return;
}
}
}
T get_dist(int from, int to){
if(!initialized) init(from);
return dist[to];
}
};
int main(){
int n, m;
cin >> n >> m;
vector<long long> a(n);
cin >> a;
BellmanFord<long long> graph(2 * n);
rep(i, n) graph.add_edge(i, n + i, -a[i]);
rep(i, m){
int u, v, c;
cin >> u >> v >> c;
u--; v--;
graph.add_edge(n + u, v, c);
}
long long ans = graph.get_dist(0, 2 * n - 1);
if(ans == -INF) cout << "inf\n";
else cout << -ans << "\n";
return 0;
}