제출 #481679

#제출 시각아이디문제언어결과실행 시간메모리
481679MilosMilutinovicTraffic (IOI10_traffic)C++14
컴파일 에러
0 ms0 KiB
#include <bits/stdc++.h> using namespace std; #define rep(i,a,n) for (int i=a;i<n;i++) #define per(i,a,n) for (int i=n-1;i>=a;i--) #define pb push_back #define mp make_pair #define all(x) (x).begin(),(x).end() #define fi first #define se second #define SZ(x) ((int)(x).size()) typedef vector<int> VI; typedef long long ll; typedef pair<int,int> PII; typedef double db; mt19937 mrand(random_device{}()); const ll mod=1000000007; int rnd(int x) { return mrand() % x;} ll powmod(ll a,ll b) {ll res=1;a%=mod; assert(b>=0); for(;b;b>>=1){if(b&1)res=res*a%mod;a=a*a%mod;}return res;} ll gcd(ll a,ll b) { return b?gcd(b,a%b):a;} // head const int N=1010000; int a[N]; ll dis[N]; vector<int> e[N]; void dfs1(int u,int p) { dis[u]=a[u]; for (int x:e[u]) if (x!=p) dfs1(x,u),dis[u]+=dis[x]; } ll LocateCentre(int n,int*P,int*S,int*D) { rep(i,0,n) a[i]=P[i]; rep(i,0,n-1) e[S[i]].pb(D[i]),e[D[i]].pb(S[i]); ll mn=2e18; int id=0; rep(i,0,n) { dfs1(i,i); ll s=0; rep(j,0,n) if (i!=j) s=max(s,dis[j]); if (ans>s) ans=s,id=i; } return id; }

컴파일 시 표준 에러 (stderr) 메시지

traffic.cpp: In function 'll LocateCentre(int, int*, int*, int*)':
traffic.cpp:39:7: error: 'ans' was not declared in this scope; did you mean 'abs'?
   39 |   if (ans>s) ans=s,id=i;
      |       ^~~
      |       abs
traffic.cpp:33:5: warning: unused variable 'mn' [-Wunused-variable]
   33 |  ll mn=2e18;
      |     ^~