Submission #29336

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
29336	2017-07-19 02:52:52	tlwpdus	Untitled (POI11_dyn)	C++11	100 / 100	1833 ms	27340 KiB

Main

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#include <bits/stdc++.h>
using namespace std;
typedef pair<int,int> pii;
void upd(pii &a, pii b) {
  a.first= min(a.first,b.first);
  a.second=max(a.second,b.second);
}
int n, m;
bool chk[300100];
vector<int> lis[300100];
int L, ans;
pii dfs(int here, int p, int c) {
  //printf("%d, %d, %d\n",here,p,c);
  pii res = pii(c,chk[here]?0:-987654321);
  for (auto &there : lis[here]) {
    if (there==p) continue;
    pii tmp = dfs(there,here,res.first+1);
    tmp.first++; tmp.second++;
    upd(res,tmp);
  }
  if (res.second<=L-res.first) res.second = -987654321;
  if (res.second==L) {
    ans++; //printf("%d!!!!\n",here+1);
    res.first = 0;
    res.second = -987654321;
  }
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

dyn.cpp: In function 'int main()':
dyn.cpp:38:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&n,&m);
                     ^
dyn.cpp:41:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&a); chk[i] = a;
                 ^
dyn.cpp:45:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d",&a,&b); --a; --b;
                      ^

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10