제출 #740873

#제출 시각아이디문제언어결과실행 시간메모리
740873LittleCube순열 (APIO22_perm)C++17
100 / 100
2 ms344 KiB
#include "perm.h" #ifndef EVAL #include "perm_grader.cpp" #endif #include <bits/stdc++.h> #define ll long long #define pii pair<int, int> #define pll pair<ll, ll> using namespace std; vector<int> construct_permutation(long long k) { vector<int> f, s, dp; int n = 0; ll ans = 0; while (k > 1) { if (k % 3 == 0) { f.emplace_back(n + 1); f.emplace_back(n); n += 2; k /= 3; } // else if(k % 3 == 0) // { // f.emplace_back(n); // f.emplace_back(n + 1); // n++; // } else if (k % 2 == 0) { f.emplace_back(n); n++; k /= 2; } else if (k % 5 == 0) { f.emplace_back(n + 1); f.emplace_back(n + 2); f.emplace_back(n); n += 3; k /= 5; } else if (k % 7 == 0) { f.emplace_back(n + 2); f.emplace_back(n + 3); f.emplace_back(n); f.emplace_back(n + 1); n += 4; k /= 7; } else { s.emplace_back(n); n++; k--; } } while (!s.empty()) { f.emplace_back(s.back()); s.pop_back(); } dp.resize(f.size()); for (int i = 0; i < f.size(); i++) { dp[i] = 1; for (int j = 0; j < i; j++) if (f[j] < f[i]) dp[i] += dp[j]; ans += dp[i]; } cerr << ans << '\n'; return f; }

컴파일 시 표준 에러 (stderr) 메시지

perm.cpp: In function 'std::vector<int> construct_permutation(long long int)':
perm.cpp:69:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   69 |  for (int i = 0; i < f.size(); i++)
      |                  ~~^~~~~~~~~~
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