Submission #125007

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
125007	2019-07-04 10:46:28	gs14004	Valley (BOI19_valley)	C++17	100 / 100	227 ms	36992 KiB

valley

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#include <bits/stdc++.h>
using namespace std;
const int MAXN = 100005;
using lint = long long;
using pi = pair<int, int>;
struct edg{
  int s, e, x;
}ed[MAXN];
vector<pi> gph[MAXN];
int n, m, q, r, din[MAXN], dout[MAXN], lvl[MAXN], piv;
lint dp[MAXN], dep[MAXN];
int par[17][MAXN];
lint spt[17][MAXN];
bool sub(int s, int e){
  return din[s] <= din[e] && dout[e] <= dout[s];
}
void dfs(int x, int p){
  din[x] = ++piv;
  for(auto &i : gph[x]){
    if(i.second == p) continue;
    dep[i.second] = dep[x] + i.first;
    lvl[i.second] = lvl[x] + 1;
    par[0][i.second] = x;
    dfs(i.second, x);
    dp[x] = min(dp[x], dp[i.second] + i.first);
  }
 
 
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Compilation message (stderr)

valley.cpp: In function 'int main()':
valley.cpp:35:7: 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,&r);
  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
valley.cpp:37:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d %d",&ed[i].s,&ed[i].e,&ed[i].x);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
valley.cpp:43:15: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   int x; scanf("%d",&x); dp[x] = 0;
          ~~~~~^~~~~~~~~
valley.cpp:60:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d",&idx,&pos);
   ~~~~~^~~~~~~~~~~~~~~~~~~

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