제출 #549961

#제출 시각아이디문제언어결과실행 시간메모리
549961Soul234여행하는 상인 (APIO17_merchant)C++14
100 / 100
113 ms3236 KiB
#include<bits/stdc++.h> using namespace std; void DBG() { cerr << "]\n"; } template<class H, class... T> void DBG(H h, T... t) { cerr << h; if(sizeof...(t)) cerr << ", "; DBG(t...); } #ifdef LOCAL #define dbg(...) cerr << "[" << #__VA_ARGS__ << "]: [", DBG(__VA_ARGS__) #else #define dbg(...) 0 #endif // LOCAL #define FOR(i,a,b) for(int i = (a) ; i<(b) ; i++) #define F0R(i,a) FOR(i,0,a) #define ROF(i,a,b) for(int i = (b)-1 ; i>=(a) ; i--) #define R0F(i,a) ROF(i,0,a) #define each(e,a) for(auto &e : (a)) #define sz(v) (int)(v).size() #define all(v) (v).begin(),(v).end() #define rall(v) (v).rbegin(),(v).rend() #define pb push_back #define tcT template<class T #define nl "\n" using ll = long long; using vi = vector<int>; using pi = pair<int,int>; using str = string; tcT> using V = vector<T>; tcT> using pqg = priority_queue<T,vector<T>,greater<T>>; void setIO(string NAME = "") { cin.tie(0)->sync_with_stdio(0); if(sz(NAME)) { freopen((NAME + ".in").c_str(),"r",stdin); freopen((NAME + ".out").c_str(),"w",stdout); } } const ll INF = 1e18; tcT> bool ckmin(T&a, const T&b) { return b < a ? a = b, 1 : 0; } tcT> bool ckmax(T&a, const T&b) { return b > a ? a = b, 1 : 0; } const int MX = 1e2+5; int N, M, K; ll B[MX][1005], S[MX][1005], E[MX][MX], d[MX][MX], chk[MX][MX]; bool ok(int tar) { memset(chk, 0x3f, sizeof chk); FOR(i,1,N+1) FOR(j,1,N+1) if(d[i][j] < INF) { chk[i][j] = d[i][j]*tar - E[i][j]; } FOR(k,1,N+1) FOR(i,1,N+1) FOR(j,1,N+1) ckmin(chk[i][j], chk[i][k] + chk[k][j]); FOR(i,1,N+1) if(chk[i][i]<=0) return 1; return 0; } void solve() { memset(d, 0x3f, sizeof d); memset(B, -1, sizeof B); memset(S, -1, sizeof S); cin>>N>>M>>K; FOR(i,1,N+1) { FOR(j,1,K+1) cin>>B[i][j]>>S[i][j]; } F0R(i,M) { int u,v,c; cin>>u>>v>>c; ckmin(d[u][v], 1LL*c); } FOR(k,1,N+1) FOR(i,1,N+1) FOR(j,1,N+1) ckmin(d[i][j], d[i][k] + d[k][j]); FOR(k,1,K+1) FOR(i,1,N+1) FOR(j,1,N+1) if(B[i][k] != -1 && S[j][k] != -1) ckmax(E[i][j], S[j][k] - B[i][k]); int lo = 0, hi = 1e9; while(lo<hi) { int mid = lo + (hi-lo+1)/2; if(ok(mid)) lo = mid; else hi = mid-1; } cout << lo << nl; } int main() { setIO(); int t=1; //cin>>t; while(t-->0) { solve(); } return 0; }

컴파일 시 표준 에러 (stderr) 메시지

merchant.cpp: In function 'void setIO(std::string)':
merchant.cpp:37:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |         freopen((NAME + ".in").c_str(),"r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
merchant.cpp:38:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |         freopen((NAME + ".out").c_str(),"w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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