제출 #985119

#제출 시각아이디문제언어결과실행 시간메모리
985119ShauryaTheShep순열 (APIO22_perm)C++17
컴파일 에러
0 ms0 KiB
#include <iostream> #include <vector> #include <algorithm> #include <numeric> // Include this header for iota using namespace std; // Function to count the number of increasing subsequences int countIncreasingSubsequences(const vector<int>& permutation) { int n = permutation.size(); vector<int> dp(n, 1); // dp[i] will store the number of increasing subsequences ending at index i int totalCount = 0; // Calculate the number of increasing subsequences ending at each index for (int i = 0; i < n; ++i) { for (int j = 0; j < i; ++j) { if (permutation[j] < permutation[i]) { dp[i] += dp[j]; } } totalCount += dp[i]; } return totalCount; } // Function to construct a permutation with exactly k increasing subsequences vector<int> construct_permutation(int64_t k) { int n = 2; vector<int> permutation; while (true) { permutation.resize(n); iota(permutation.begin(), permutation.end(), 1); // Create permutation starting from 1 do { if (countIncreasingSubsequences(permutation) == k) { return permutation; } } while (next_permutation(permutation.begin(), permutation.end())); ++n; } return {}; // Should not reach here if k is within valid range }

컴파일 시 표준 에러 (stderr) 메시지

/usr/bin/ld: /tmp/ccBNOpOk.o: in function `main':
grader.cpp:(.text.startup+0x240): undefined reference to `construct_permutation(long long)'
collect2: error: ld returned 1 exit status