제출 #405340

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
405340		Aryan_Raina	Poklon (COCI17_poklon7)	C++14	120 / 120	801 ms	221680 KiB

poklon

#include <bits/stdc++.h>
using namespace std; 
 
#define int int64_t
#define ld long double
#define ar array
 
const int INF = 1e17;
const int MOD = 1e9+7;
 
int32_t main() {
   ios_base::sync_with_stdio(0);
   cin.tie(0); cout.tie(0);
 
   int N; cin >> N;
   vector<ar<int,2>> adj(N);
   for (auto &i : adj) {
      cin >> i[0] >> i[1];
      if (i[0] > 0) --i[0];
      if (i[1] > 0) --i[1];
   }

   vector<string> remdi;
   function<int(int)> dfs = [&](int u)->int {
      if (u < 0) {
         remdi.push_back("");
         for (int i = -u; i; i >>= 1) remdi.back() += '0' + (i & 1);
         reverse(remdi.back().begin(), remdi.back().end());
         return (int) remdi.size() - 1;
      }

      int lc = dfs(adj[u][0]), rc = dfs(adj[u][1]), ans = lc;
      if (remdi[lc].size() == remdi[rc].size()) {
         for (int i = 0; i < remdi[lc].size(); i++) {
            if (remdi[lc][i] ^ remdi[rc][i]) {
               ans = (remdi[lc][i] - '0') ? lc : rc; 
               break;
            }
         }
      } else {
         ans = (remdi[lc].size() > remdi[rc].size()) ? lc : rc;
      }

      remdi[ans] += '0';
      return ans;
   };

   cout << remdi[dfs(0)] << '\n';
}  

컴파일 시 표준 에러 (stderr) 메시지

poklon.cpp: In lambda function:
poklon.cpp:34:28: warning: comparison of integer expressions of different signedness: 'int64_t' {aka 'long int'} and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |          for (int i = 0; i < remdi[lc].size(); i++) {
      |                          ~~^~~~~~~~~~~~~~~~~~

• Subtask 1: 120 / 120