제출 #591254

#제출 시각아이디문제언어결과실행 시간메모리
591254codebuster_10여행하는 상인 (APIO17_merchant)C++17
100 / 100
464 ms3424 KiB
#include <bits/stdc++.h> // #define int int64_t //be careful about this using namespace std; #define vt vector #define ar array #define pr pair #define f first #define s second #define pb push_back #define eb emplace_back #define fr(i,a,b) for(int i = (a); i < (b); ++i) #define rf(i,a,b) for(int i = (b)-1; i >= (a); --i) #define all(x) x.begin(),x.end() #define mem(a,b) memset(a,b,sizeof(a)) namespace IN{ template<class T> void re(vector<T> &A); template<class S,class T> void re(pair<S,T> &A); template<class T,size_t N> void re(array<T,N> &A); template<class T> void re(T& x){ cin >> x;} template<class H, class... T> void re(H& h, T&... t){ re(h); re(t...);} template<class T> void re(vector<T> &A){ for(auto& x : A) re(x);} template<class S,class T> void re(pair<S,T> &A){ re(A.first); re(A.second);} template<class T,size_t N> void re(array<T,N> &A){ for(int i = 0; i < N; ++i) re(A[i]);} } namespace OUT{ template<class T> void __p(const T& a){ cout<<a; } template<class T, class F> void __p(const pair<T, F>& a){ cout<<"{"; __p(a.first); cout<<","; __p(a.second); cout<<"}\n"; } template<class T, size_t N> void __p(const array<T,N>& a){ cout<<"{"; for(int i=0;i<N;++i)__p(a[i]),cout<<",}\n"[i+1==N]; } template<class T> void __p(const vector<T>& a){ cout<<"{";for(auto it=a.begin();it<a.end();it++)__p(*it),cout<<",}\n"[it+1==a.end()]; } template<class T, class ...Arg> void __p(T a1, Arg ...a){__p(a1); __p(a...); } template<class Arg1> void __f(const char *s, Arg1 &&arg1){ cout<<s<<" : "; __p(arg1); cout<<endl; } template<class Arg1, class ... Args> void __f(const char *ss, Arg1 &&arg1, Args &&... args){ int b=0,i=0; do{ if(ss[i]=='(') b++; if(ss[i]==')') b--; i++;}while(!(ss[i]==','&&b==0)); const char *comma=ss+i; cout.write(ss,comma-ss)<<" : ";__p(arg1);cout<<" | ";__f(comma+1,args...);} #define trace(...) cout<<"Line:"<<__LINE__<<" ", __f(#__VA_ARGS__, __VA_ARGS__) } namespace FUNC{ void IO(string s = ""){ ios_base::sync_with_stdio(NULL); cin.tie(nullptr); cout.precision(20); cout << fixed; if(!s.empty()){ freopen((s+".in").c_str(),"r",stdin); freopen((s+".out").c_str(),"w",stdout); } } const auto start_time = chrono::high_resolution_clock::now(); void output_run_time(){ // will work for ac,cc&&cf. #ifndef ONLINE_JUDGE auto end_time = chrono::high_resolution_clock::now(); chrono::duration<double> diff = end_time-start_time; cout << "\n\n\nTime Taken : " << diff.count(); #endif } template<class T> bool ckmin(T& a, const T& b){ return b < a ? a = b, true : false; } template<class T> bool ckmax(T& a, const T& b){ return a < b ? a = b, true : false; } mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count()); int my_rand(int L, int R){ return uniform_int_distribution<int>(L,R)(rng); } template<class T> int sz(const T& x){ return int(x.size()); } template<class T> int lb(const vector<T>& vec,const T& val){ return int(lower_bound(vec.begin(), vec.end(),val) - vec.begin()); } template<class T> int ub(const vector<T>& vec,const T& val){ return int(upper_bound(vec.begin(), vec.end(),val) - vec.begin()); } constexpr int dx[4] = {1,0,-1,0}; constexpr int dy[4] = {0,1,0,-1}; constexpr char dr[4] = {'D','R','U','L'}; constexpr long long INFLL1 = 1e16, INFLL2 = 9e18; constexpr int INF = 1e9; template<class T> vector<T> V(int n,T val){ return vector<T> (n,val); } template<class T> vector<vector<T>> V(int n,int m,T val){ return vector<vector<T>> (n,vector<T> (m,val)); } template<class T> vector<vector<vector<T>>> V(int n,int m,int k,T val){ return vector<vector<vector<T>>> (n,vector<vector<T>> (m,vector<T> (k,val))); } } using namespace IN; using namespace OUT; using namespace FUNC; signed main(){ IO(); int n,m,K; re(n,m,K); vt<vt<int>> buy(n,vt<int>(K+1)),sell(n,vt<int>(K+1)); fr(i,0,n){ fr(j,0,K){ re(buy[i][j],sell[i][j]); } buy[i][K] = sell[i][K] = 0; } vt<vt<int>> dis(n,vt<int>(n,INF)); fr(e,0,m){ int u,v,w; re(u,v,w); --u,--v; dis[u][v] = w; } fr(k,0,n) fr(i,0,n) fr(j,0,n) ckmin(dis[i][j],dis[i][k]+dis[k][j]); auto can = [&](int ef) -> bool { auto min_dis = V<long long>(n,n,INFLL1); fr(i,0,n){ fr(j,0,n){ if(dis[i][j] == INF) continue; long long best = -INF; fr(k,0,K+1){ if(sell[j][k] < 0 || buy[i][k] < 0) continue; ckmax(best,sell[j][k] - buy[i][k] - ef * 1LL * dis[i][j]); } if(best == -INF) continue; ckmin(min_dis[i][j],-best); } } fr(k,0,n) fr(i,0,n) fr(j,0,n) ckmin(min_dis[i][j],min_dis[i][k]+min_dis[k][j]); fr(i,0,n) if(min_dis[i][i] <= 0) return true; return false; }; int lo = 0, hi = INF; while(hi - lo > 1){ int mid = (hi + lo)/2; can(mid) ? lo = mid : hi = mid; } cout << lo; // output_run_time(); return 0; }

컴파일 시 표준 에러 (stderr) 메시지

merchant.cpp: In function 'void FUNC::IO(std::string)':
merchant.cpp:68:14: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   68 |       freopen((s+".in").c_str(),"r",stdin);
      |       ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
merchant.cpp:69:14: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   69 |       freopen((s+".out").c_str(),"w",stdout);
      |       ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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