Submission #130963

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
130963	2019-07-16 10:17:29	IOrtroiii	Valley (BOI19_valley)	C++14	100 / 100	307 ms	36216 KiB

valley

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#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const ll inf = 1e18;
const int N = 100100;
int n, m, q, root;
int from[N], to[N];
vector<pair<int, int>> g[N];
ll dep[N], down[N];
int par[17][N];
ll minPar[17][N];
int tin[N], tout[N], tt;
void dfs(int u) {
   for (int i = 1; i < 17; ++i) {
      par[i][u] = par[i - 1][par[i - 1][u]];
   }
   tin[u] = ++tt;
   for (auto e : g[u]) {
      int v, w;
      tie(v, w) = e;
      if (v != par[0][u]) {
         par[0][v] = u;
         dep[v] = dep[u] + w;
         dfs(v);
      }
   }
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

valley.cpp: In function 'int main()':
valley.cpp:59:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d %d %d %d", &n, &m, &q, &root);
    ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
valley.cpp:62:12: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
       scanf("%d %d %d", from + i, to + i, &cost);
       ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
valley.cpp:73:12: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
       scanf("%d", &v);
       ~~~~~^~~~~~~~~~
valley.cpp:89:12: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
       scanf("%d %d", &id, &v);
       ~~~~~^~~~~~~~~~~~~~~~~~

• Subtask 1: 9 / 9
• Subtask 2: 27 / 27
• Subtask 3: 23 / 23
• Subtask 4: 41 / 41