Submission #1072347

#TimeUsernameProblemLanguageResultExecution timeMemory
1072347duckindogArt Collections (BOI22_art)C++17
50 / 100
488 ms1376 KiB
#include <bits/stdc++.h> #ifndef LOCAL #include "art.h" #endif using namespace std; void __attribute__((noreturn)) __attribute__((format(printf, 1, 2))) result(const char *msg, ...) { va_list args; va_start(args, msg); vfprintf(stdout, msg, args); fprintf(stdout, "\n"); va_end(args); exit(0); } #ifdef LOCAL namespace { int N; int Q = 0; const int MAX_Q = 4000; const int MAX_N = 4000; vector<int> solution; } // namespace int publish(vector<int> R) { printf("publish({"); for(int i = 0; i < int(R.size()); ++i) { if(i == 0) printf("%d", R[i]); else printf(", %d", R[i]); } printf("})\n"); fflush(stdout); if (++Q > MAX_Q) result("Too many published rankings!"); if (int(R.size()) != N) result("Invalid published ranking!"); set<int> chosen; for(auto &x : R) { if(x < 1 || x > N || chosen.count(x)) result("Invalid published ranking!"); chosen.insert(x); } vector<int> positions(N+1); for(int i = 0; i < N; ++i) positions[R[i]] = i; int complaints = 0; for(int i = 0; i < N; ++i) { for(int j = i+1; j < N; ++j) { if(positions[solution[i]] > positions[solution[j]]) ++complaints; } } return complaints; } void __attribute__((noreturn)) answer(vector<int> R) { printf("answer({"); for(int i = 0; i < int(R.size()); ++i) { if(i == 0) printf("%d", R[i]); else printf(", %d", R[i]); } printf("})\n"); fflush(stdout); if(R == solution) result("Correct: %d published ranking(s).", Q); else result("Wrong answer!"); } #endif vector<int> order; int x; bool cmp (const auto& a, const auto& b) { swap(order[a - 1], order[b - 1]); int y = publish(order); swap(order[a - 1], order[b - 1]); return (a > b ? x > y : x < y); }; vector<int> mergeSort(vector<int> vt) { if (vt.size() <= 1) return vt; vector<int> a(vt.begin(), vt.begin() + vt.size() / 2), b(vt.begin() + vt.size() / 2, vt.end()); a = mergeSort(a); b = mergeSort(b); if (b.size() && !cmp(a[0], b[0])) swap(a, b); vector<vector<int>> save(a.size()); int it = 0; for (const auto& x : b) { while (it + 1 < a.size() && cmp(a[it + 1], x)) it += 1; save[it].push_back(x); } vector<int> ret; for (int i = 0; i < a.size(); ++i) { ret.push_back(a[i]); for (const auto&x : save[i]) ret.push_back(x); } return ret; } void solve(int n) { order.resize(n); iota(order.begin(), order.end(), 1); x = publish(order); auto ret = mergeSort(order); answer(ret); } #ifdef LOCAL int main() { if (scanf("%d", &N) != 1 || N < 2 || N > MAX_N) result("Invalid input!"); solution.resize(N); set<int> chosen; for(auto &x : solution) { if(scanf("%d", &x) != 1 || x < 1 || x > N || chosen.count(x)) result("Invalid input!"); chosen.insert(x); } solve(N); result("No answer!"); } #endif

Compilation message (stderr)

art.cpp:86:17: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   86 | bool cmp (const auto& a, const auto& b) {
      |                 ^~~~
art.cpp:86:32: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   86 | bool cmp (const auto& a, const auto& b) {
      |                                ^~~~
art.cpp: In function 'std::vector<int> mergeSort(std::vector<int>)':
art.cpp:104:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  104 |     while (it + 1 < a.size() && cmp(a[it + 1], x)) it += 1;
      |            ~~~~~~~^~~~~~~~~~
art.cpp:109:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  109 |   for (int i = 0; i < a.size(); ++i) {
      |                   ~~^~~~~~~~~~
interface.cpp: In function 'int publish(std::vector<int>)':
interface.cpp:20:17: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   20 |     if(v.size() != N) {
      |        ~~~~~~~~~^~~~
interface.cpp: In function 'void answer(std::vector<int>)':
interface.cpp:36:17: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   36 |     if(v.size() != N) {
      |        ~~~~~~~~~^~~~
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