Submission #218289

#TimeUsernameProblemLanguageResultExecution timeMemory
218289summitweiDreaming (IOI13_dreaming)C++17
100 / 100
127 ms17664 KiB
#include <bits/stdc++.h> #include <dreaming.h> using namespace std; typedef vector<int> vi; typedef vector<pair<int, int> > vpii; typedef pair<int, int> pii; typedef long long ll; typedef pair<ll, ll> pll; typedef pair<double, double> pdd; typedef vector<ll> vll; #define INF 0x3f3f3f3f #define MOD 1000000007LL #define EPSILON 0.00001 #define f first #define s second #define pb push_back #define mp make_pair #define FOR(i, a, b) for (ll i=(a); i<=(signed)(b); i++) #define F0R(i, a) for (ll i=0; i<(signed)(a); i++) #define RFOR(i, a, b) for (ll i=(a); i >= b; i--) #define MN 100005 vpii e[MN]; int vis[MN]; pii far(int cn, int p){ //{dist, node} vis[cn] = true; pii ans = {0, cn}; for(auto nn : e[cn]) if(nn.f != p){ pii res = far(nn.f, cn); ans = max(ans, {res.f+nn.s, res.s}); } return ans; } int d[2][MN]; int cmn; void gda(int t, int cn, int p){ if(t == 1){ cmn = min(cmn, max(d[0][cn], d[1][cn])); } for(auto nn : e[cn]) if(nn.f != p){ d[t][nn.f] = d[t][cn]+nn.s; gda(t, nn.f, cn); } } int ans; int diam(int x){ pii res1 = far(x, -1); pii res2 = far(res1.s, -1); //return {res2.f, {res1.s, res2.s}}; ans = max(ans, res2.f); cmn = INF; gda(0, res1.s, -1); gda(1, res2.s, -1); return cmn; } int travelTime(int N, int M, int L, int A[], int B[], int T[]){ int n = N; int m = M; int l = L; F0R(i, m){ e[A[i]].pb({B[i], T[i]}); e[B[i]].pb({A[i], T[i]}); } vi hmm; F0R(i, n){ if(!vis[i]){ hmm.pb(diam(i)); } } sort(hmm.begin(), hmm.end(), greater<int>() ); if(hmm.size() == 1){ return max(ans, hmm[0]); } else if(hmm.size() == 2){ return max(ans, hmm[0]+hmm[1]+l); } else{ return max(ans, max(hmm[0]+hmm[1]+l, hmm[1]+hmm[2]+l+l)); } } /*int main(){ ios_base::sync_with_stdio(false); cin.tie(0); /*int N, M, L; cin >> N >> M >> L; int A[M], B[M], T[M]; F0R(i, M) cin >> A[i] >> B[i] >> T[i]; cout << travelTime(N, M, L, A, B, T) << "\n"; int N=20; int M=N-2, L=rand()%1000; vi hmm; F0R(i, N){ hmm.pb(i); } F0R(_, 10) random_shuffle(hmm.begin(), hmm.end()); int spl = 5+rand()%10; vpii hmm2; F0R(i, N-1){ if(i != spl){ hmm2.pb({hmm[i], hmm[i+1]}); } } F0R(_, 10) random_shuffle(hmm2.begin(), hmm2.end()); int A[M], B[M], T[M]; F0R(i, M){ if(rand()%2){ A[i] = hmm2[i].f; B[i] = hmm2[i].s; } else{ A[i] = hmm2[i].s; B[i] = hmm2[i].f; } T[i] = rand()%1000; } cout << N << " " << M << " " << L << "\n"; F0R(i, M){ cout << A[i] << " " << B[i] << " " << T[i] << "\n"; } cout << "\n"; cout << travelTime(N, M, L, A, B, T) << "\n"; return 0; }*/

Compilation message (stderr)

dreaming.cpp:83:5: warning: "/*" within comment [-Wcomment]
     /*int N, M, L;
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