Submission #55881

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
55881	2018-07-09 06:46:04	khsoo01	Telegraph (JOI16_telegraph)	C++11	100 / 100	125 ms	8664 KiB

telegraph

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#include<bits/stdc++.h>
#define X first
#define Y second
using namespace std;
typedef long long ll;
typedef pair<ll,ll> pll;
const ll N = 100005, inf = 1e18;
ll n, d[N], v[N], ind[N], dt[N], ans;
bool vis[N];
vector<pll> adj[N];
queue<ll> q;
ll solve (ll I) {
  ll A, B, C = 0, R = 0;
  for(auto &T : adj[I]) {
    tie(A, B) = T;
    R += solve(A) + B;
    C = max(B, C);
  }
  return R - C;
}
int main()
{
  scanf("%lld",&n);
  for(ll i=1;i<=n;i++) {
    scanf("%lld%lld",&d[i],&v[i]);
 
 
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Compilation message (stderr)

telegraph.cpp: In function 'int main()':
telegraph.cpp:28:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld",&n);
  ~~~~~^~~~~~~~~~~
telegraph.cpp:30:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld%lld",&d[i],&v[i]);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
telegraph.cpp:2:11: warning: 'first' may be used uninitialized in this function [-Wmaybe-uninitialized]
 #define X first
           ^~~~~
telegraph.cpp:2:11: note: 'first' was declared here
 #define X first
           ^
telegraph.cpp:48:7: note: in expansion of macro 'X'
    ll X, Y = 0, A, B;
       ^

• Subtask 1: 10 / 10
• Subtask 2: 30 / 30
• Subtask 3: 30 / 30
• Subtask 4: 30 / 30