結果
問題 |
No.1283 Extra Fee
|
ユーザー |
![]() |
提出日時 | 2020-11-30 06:01:30 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 660 ms / 2,000 ms |
コード長 | 3,323 bytes |
コンパイル時間 | 3,571 ms |
コンパイル使用メモリ | 210,060 KB |
最終ジャッジ日時 | 2025-01-16 10:20:18 |
ジャッジサーバーID (参考情報) |
judge2 / judge5 |
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ファイルパターン | 結果 |
---|---|
other | AC * 30 |
ソースコード
#include <bits/stdc++.h> using namespace std; typedef long long ll; typedef pair<ll, ll> p_ll; template<class T> void debug(T itr1, T itr2) { auto now = itr1; while(now<itr2) { cout << *now << " "; now++; } cout << endl; } #define repr(i,from,to) for (ll i=(ll)from; i<(ll)to; i++) #define all(vec) vec.begin(), vec.end() #define rep(i,N) repr(i,0,N) #define per(i,N) for (int i=(int)N-1; i>=0; i--) const ll MOD = pow(10,9)+7; const ll LLINF = pow(2,61)-1; const int INF = pow(2,30)-1; vector<ll> fac; void c_fac(int x=pow(10,6)+10) { fac.resize(x,true); rep(i,x) fac[i] = i ? (fac[i-1]*i)%MOD : 1; } ll modpow(ll x, ll p) { ll result = 1, now = 1, pm = x; while (now<=p) { if (p&now) { result = result * pm % MOD; } now*=2; pm = pm*pm % MOD; } return result; } ll inv(ll a, ll m=MOD) { ll b = m, x = 1, y = 0; while (b!=0) { int d = a/b; a -= b*d; swap(a,b); x -= y*d; swap(x,y); } return (x+m)%m; } ll nck(ll n, ll k) { return fac[n]*inv(fac[k]*fac[n-k]%MOD)%MOD; } ll gcd(ll a, ll b) { if (a<b) swap(a,b); return b==0 ? a : gcd(b, a%b); } ll lcm(ll a, ll b) { return a/gcd(a,b)*b; } // ---------------------------------------------------------------------- // ---------------------------------------------------------------------- struct dijkstra { ll N; struct edge { ll to, d; }; vector<vector<edge>> adj; vector<ll> minlen; dijkstra(ll n) { N = n; adj.resize(N); minlen.assign(N,LLINF); } ll operator[](const ll &x) const { return minlen[x]; } void add_edge(ll from, ll to, ll d){ adj[from].push_back({to,d}); } vector<ll> calc(ll n=0) { auto c = [](const p_ll &x, const p_ll &y){return x.second>y.second;}; priority_queue<p_ll, vector<p_ll>, decltype(c)> q(c); minlen[n] = 0; q.push(make_pair(n,0)); while(q.size()) { p_ll now = q.top(); q.pop(); ll np = now.first, nd = now.second; if (nd>minlen[np]) continue; for (auto x: adj[np]) { if (minlen[x.to]<=minlen[np]+x.d) continue; q.push(make_pair(x.to, minlen[np]+x.d)); minlen[x.to] = minlen[np]+x.d; } } return minlen; } }; // ---------------------------------------------------------------------- // ---------------------------------------------------------------------- int main() { ll N, M; cin >> N >> M; ll fee[N][N] = {}; rep(i,M) { ll h, w, c; cin >> h >> w >> c; h--; w--; fee[h][w] = c; } dijkstra d(N*N*2); rep(i,N) rep(j,N) { if (i!=0) { d.add_edge(i*N+j , (i-1)*N+j ,fee[i-1][j]+1); d.add_edge(i*N+j+N*N, (i-1)*N+j+N*N,fee[i-1][j]+1); d.add_edge(i*N+j , (i-1)*N+j+N*N, 1); } if (i!=N-1) { d.add_edge(i*N+j , (i+1)*N+j ,fee[i+1][j]+1); d.add_edge(i*N+j+N*N, (i+1)*N+j+N*N,fee[i+1][j]+1); d.add_edge(i*N+j , (i+1)*N+j+N*N, 1); } if (j!=0) { d.add_edge(i*N+j , i*N+(j-1) ,fee[i][j-1]+1); d.add_edge(i*N+j+N*N, i*N+(j-1)+N*N,fee[i][j-1]+1); d.add_edge(i*N+j , i*N+(j-1)+N*N, 1); } if (j!=N-1) { d.add_edge(i*N+j , i*N+(j+1) ,fee[i][j+1]+1); d.add_edge(i*N+j+N*N, i*N+(j+1)+N*N,fee[i][j+1]+1); d.add_edge(i*N+j , i*N+(j+1)+N*N, 1); } } vector<ll> dres = d.calc(); ll result = dres[2*N*N-1]; cout << result << endl; return 0; }