제출 #631839

#제출 시각아이디문제언어결과실행 시간메모리
631839jwvg0425드문 곤충 (IOI22_insects)C++17
99.75 / 100
62 ms548 KiB
#include "insects.h" #include <stdio.h> #include <vector> #include <queue> #include <algorithm> #include <iostream> #include <string> #include <bitset> #include <map> #include <set> #include <tuple> #include <string.h> #include <math.h> #include <random> #include <functional> #include <assert.h> #include <math.h> #define all(x) (x).begin(), (x).end() #define xx first #define yy second using namespace std; template<typename T, typename Pr = less<T>> using pq = priority_queue<T, vector<T>, Pr>; using i64 = long long int; using ii = pair<int, int>; using ii64 = pair<i64, i64>; int min_cardinality(int n) { // i번 원소는 각 집합에서 l[i]번째 이상 r[i]번째 이하 원소임(맨왼쪽부터 그 집합 순서대로 다 포함시켰을때) vector<int> l(n, 1); vector<int> r(n, n); set<int> sel; for (int i = 0; i < n; i++) { move_inside(i); if (press_button() > 1) { l[i] = 2; move_outside(i); continue; } r[i] = 1; sel.insert(i); } int group = sel.size(); int now = 1; int lo = 1, hi = n / group; int ans = n; while (lo <= hi) { int mid = (lo + hi) / 2; set<int> noSel; for (auto& si : sel) { if (r[si] > mid) noSel.insert(si); } for (auto& no : noSel) { move_outside(no); sel.erase(no); } now = press_button(); for (int i = 0; i < n; i++) { if (sel.find(i) != sel.end() || l[i] > mid) continue; move_inside(i); if (r[i] <= now) { sel.insert(i); continue; } int x = press_button(); if (x > mid) { l[i] = x; move_outside(i); continue; } sel.insert(i); if (x > now) { l[i] = r[i] = x; now = x; } else { // 최소한 now번째 이하임 r[i] = now; } } if (sel.size() == group * mid) { ans = mid; lo = mid + 1; } else { hi = mid - 1; } } return ans; }

컴파일 시 표준 에러 (stderr) 메시지

insects.cpp: In function 'int min_cardinality(int)':
insects.cpp:111:18: warning: comparison of integer expressions of different signedness: 'std::set<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  111 |   if (sel.size() == group * mid)
      |       ~~~~~~~~~~~^~~~~~~~~~~~~~
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