Submission #199092

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
199092	2020-01-29 08:17:48	dennisstar	Telegraph (JOI16_telegraph)	C++17	100 / 100	52 ms	5432 KiB

telegraph

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#include <bits/stdc++.h>
#define fi first
#define se second
#define em emplace
#define eb emplace_back
#define sq(X) ((X)*(X))
#define all(V) (V).begin(), (V).end()
#define chk_init memset(chk, 0, sizeof(chk))
#define unq(V) (V).erase(unique(all(V)), (V).end())
using namespace std;
typedef long long ll;
typedef vector<ll> vlm;
typedef vector<int> vim;
typedef pair<ll, ll> pll;
typedef pair<int, int> pii;
int N, A[100010], chk[100010], cy[100010];
ll C[100010], S, ans, M1[100010], M2[100010];
int main() {
  scanf("%d", &N);
  for (int i=1; i<=N; i++) scanf("%d %lld", &A[i], &C[i]), S+=C[i];
  int cnt=0;
  for (int i=1; ; i=A[i]) {
    if (chk[i]) {
      if (i==1&&cnt==N) { puts("0"); return 0; }
      break;
    }
    chk[i]=1, cnt++;
 
 
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Compilation message (stderr)

telegraph.cpp: In function 'int main()':
telegraph.cpp:21:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &N);
  ~~~~~^~~~~~~~~~
telegraph.cpp:22:57: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for (int i=1; i<=N; i++) scanf("%d %lld", &A[i], &C[i]), S+=C[i];
                           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~

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