Submission #392956

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
392956	2021-04-22 12:30:21	asbsfds	Torrent (COI16_torrent)	C++14	31 / 100	82 ms	26108 KiB

torrent

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#include <bits/stdc++.h>
#define X first
#define Y second
using namespace std;
typedef long long llint;
const int maxn = 2e5+10;
const int base = 31337;
const int mod = 1e9+7;
const int inf = 0x3f3f3f3f;
const int logo = 20;
const int off = 1 << logo;
const int treesiz = off << 1;
int n, a, b;
vector< int > graph[maxn];
int dp[maxn];
vector< int > v;
bool dfs(int x, int parr) {
  bool out = (x == b);
  for (int i = 0; i < graph[x].size(); i++) {
    int tren = graph[x][i];
    if (tren == parr) continue;
    out |= dfs(tren, x);
  }
  if (out) v.push_back(x);
  return out;
}
 
 
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Compilation message (stderr)

torrent.cpp: In function 'bool dfs(int, int)':
torrent.cpp:23:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |  for (int i = 0; i < graph[x].size(); i++) {
      |                  ~~^~~~~~~~~~~~~~~~~
torrent.cpp: In function 'int f(int, int)':
torrent.cpp:43:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |  for (int i = 0; i < graph[x].size(); i++) {
      |                  ~~^~~~~~~~~~~~~~~~~
torrent.cpp:51:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   51 |  for (int i = 0; i < v.size(); i++) {
      |                  ~~^~~~~~~~~~
torrent.cpp: In function 'int main()':
torrent.cpp:89:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   89 |   if (tr >= 0 && tr + 1 <= v.size() - 1) {
      |                  ~~~~~~~^~~~~~~~~~~~~~~
torrent.cpp:65:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   65 |  scanf("%d%d%d", &n, &a, &b);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~~~
torrent.cpp:68:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   68 |   scanf("%d%d", &x, &y);
      |   ~~~~~^~~~~~~~~~~~~~~~

• Subtask 1: 31 / 31
• Subtask 2: 0 / 69