結果
問題 | No.1283 Extra Fee |
ユーザー |
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提出日時 | 2020-11-06 21:47:03 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 175 ms / 2,000 ms |
コード長 | 3,281 bytes |
コンパイル時間 | 2,426 ms |
コンパイル使用メモリ | 209,264 KB |
最終ジャッジ日時 | 2025-01-15 20:31:16 |
ジャッジサーバーID (参考情報) |
judge1 / judge4 |
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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; #define LOCAL #pragma region Macros typedef long long ll; #define ALL(x) (x).begin(),(x).end() const long long MOD=1000000007; // const long long MOD=998244353; const int INF=1e9; const long long IINF=1e18; const int dx[4]={1,0,-1,0},dy[4]={0,1,0,-1}; const char dir[4]={'D','R','U','L'}; template<typename T> istream &operator>>(istream &is,vector<T> &v){ for (T &x:v) is >> x; return is; } template<typename T> ostream &operator<<(ostream &os,const vector<T> &v){ for (int i=0;i<v.size();++i){ os << v[i] << (i+1==v.size()?"": " "); } return os; } template<typename T,typename U> ostream &operator<<(ostream &os,const pair<T,U> &p){ os << '(' << p.first << ',' << p.second << ')'; return os; } template<typename T,typename U> ostream &operator<<(ostream &os,const map<T,U> &m){ os << '{'; for (auto itr=m.begin();itr!=m.end();++itr){ os << '(' << itr->first << ',' << itr->second << ')'; if (++itr!=m.end()) os << ','; --itr; } os << '}'; return os; } template<typename T> ostream &operator<<(ostream &os,const set<T> &s){ os << '{'; for (auto itr=s.begin();itr!=s.end();++itr){ os << *itr; if (++itr!=s.end()) os << ','; --itr; } os << '}'; return os; } void debug_out(){cerr << '\n';} template<class Head,class... Tail> void debug_out(Head&& head,Tail&&... tail){ cerr << head; if (sizeof...(Tail)>0) cerr << ", "; debug_out(move(tail)...); } #ifdef LOCAL #define debug(...) cerr << " ";\ cerr << #__VA_ARGS__ << " :[" << __LINE__ << ":" << __FUNCTION__ << "]" << '\n';\ cerr << " ";\ debug_out(__VA_ARGS__) #else #define debug(...) 42 #endif template<typename T> T gcd(T x,T y){return y!=0?gcd(y,x%y):x;} template<typename T> T lcm(T x,T y){return x/gcd(x,y)*y;} template<class T1,class T2> inline bool chmin(T1 &a,T2 b){ if (a>b){a=b; return true;} return false; } template<class T1,class T2> inline bool chmax(T1 &a,T2 b){ if (a<b){a=b; return true;} return false; } #pragma endregion using T=tuple<ll,int,int,int>; const int MAX_N=510; ll dp[MAX_N][MAX_N][2]; int main(){ cin.tie(0); ios::sync_with_stdio(false); int N,M; cin >> N >> M; vector<vector<ll>> cost(N,vector<ll>(N,1)); for (int i=0;i<M;++i){ int h,w,c; cin >> h >> w >> c; cost[--h][--w]+=c; } for (int i=0;i<N;++i){ for (int j=0;j<N;++j){ for (int k=0;k<2;++k){ dp[i][j][k]=IINF; } } } priority_queue<T,vector<T>,greater<T>> pq; dp[0][0][0]=0; pq.emplace(dp[0][0][0],0,0,0); while (!pq.empty()){ auto t=pq.top(); pq.pop(); int x=get<1>(t),y=get<2>(t),z=get<3>(t); if (dp[x][y][z]<get<0>(t)) continue; for (int i=0;i<4;++i){ int nx=x+dx[i],ny=y+dy[i]; if (nx<0||N<=nx||ny<0||N<=ny) continue; if (chmin(dp[nx][ny][z],dp[x][y][z]+cost[nx][ny])){ pq.emplace(dp[nx][ny][z],nx,ny,z); } if (!z&&chmin(dp[nx][ny][z+1],dp[x][y][z]+1)){ pq.emplace(dp[nx][ny][z+1],nx,ny,z+1); } } } ll ans=min(dp[N-1][N-1][0],dp[N-1][N-1][1]); cout << ans << '\n'; }