Submission #55118

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
55118	2018-07-06 05:23:20	ainta	Telegraph (JOI16_telegraph)	C++17	100 / 100	110 ms	8424 KiB

telegraph

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#include<cstdio>
#include<algorithm>
#include<vector>
using namespace std;
vector<int>E[101000];
int n, C[101000], w[101000], Deg[101000], Q[101000], head, tail, v[101000], chk;
long long res;
void Do(int a) {
  int t = a, i, rr = 1e9;
  vector<int>T;
  while (1) {
    v[t] = 1;
    T.push_back(t);
    t = w[t];
    if (t == a)break;
  }
  if (T.size() == n) {
    chk = 1;
    return;
  }
  for (auto &x : T) {
    int Mx1 = -1, Mx2 = 0;
    for (auto &y : E[x]) {
      if (Deg[y])Mx1 = max(Mx1, C[y]);
      else Mx2 = max(Mx2, C[y]);
    }
    rr = min(rr, Mx1 - Mx2);
  }
  rr = max(rr, 0);
  res += rr;
 
 
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Compilation message (stderr)

telegraph.cpp: In function 'void Do(int)':
telegraph.cpp:17:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  if (T.size() == n) {
      ~~~~~~~~~^~~~
telegraph.cpp:9:13: warning: unused variable 'i' [-Wunused-variable]
  int t = a, i, rr = 1e9;
             ^
telegraph.cpp: In function 'int main()':
telegraph.cpp:47:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for (int j = 0; j < T.size() - 1; j++) {
                    ~~^~~~~~~~~~~~~~
telegraph.cpp:34:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
  ~~~~~^~~~~~~~~~
telegraph.cpp:36:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &w[i],&C[i]);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~

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