제출 #1044562

#제출 시각아이디문제언어결과실행 시간메모리
1044562VahanAbrahamCOVID tests (CEOI24_covid)C++17
13.73 / 100
2712 ms600 KiB
#define _CRT_SECURE_NO_WARNINGS #include <iostream> #include <string> #include <algorithm> #include <cstring> #include <cstdio> #include <sstream> #include <map> #include <stack> #include <set> #include <queue> #include <list> #include <unordered_set> #include <unordered_map> #include <math.h> #include <bitset> #include <cmath> #include <vector> #include <iomanip> #include <random> #include <chrono> #include <cassert> #include <cassert> #include <cstdio> #include <string> #include <vector> /// You may use: using namespace std; // The number of students int N; #define ll long long #define fr first #define sc second #define pb push_back // The probability any given student is positive double P; // This function performs a test on a subset of samples. // Its argument is a vector of Booleans of length N, // where the i-th element is true if the i-th sample should be added to the mix. // It returns true if (and only if) at least one of the samples in the mix is positive. bool test_students(std::vector<bool> mask) { assert(mask.size() == (size_t)N); std::string mask_str(N, ' '); for (int i = 0; i < N; i++) mask_str[i] = mask[i] ? '1' : '0'; printf("Q %s\n", mask_str.c_str()); fflush(stdout); char answer; scanf(" %c", &answer); return answer == 'P'; } int ans[10000]; void rec(int l, int r) { vector<bool> v; v.resize(N); for (int i = 0; i < N; ++i) { if (i >= l && i <= r) { v[i] = 1; } else { v[i] = 0; } } if (l == r) { if (test_students(v) == 0) { for (int i = l; i <= r; ++i) { ans[i] = -1; } return; } return; } if (test_students(v) == 0) { for (int i = l; i <= r; ++i) { ans[i] = -1; } return; } else { int mid = (l + r) / 2; rec(l, mid); rec(mid + 1, r); } } /// You should implement: // This function will be called once for each test instance. // It should use test_students to determine which samples are positive. // It must return a vector of Booleans of length N, // where the i-th element is true if and only if the i-th sample is positive. std::vector<bool> find_positive() { std::vector<bool> answer(N); //1111 int q = 0; if (P == 0.001) { ++q; for (int i = 0; i < N; i += 200) { rec(i, min(i + 199,N-1)); } } //22 if (P == 0.005256) { ++q; for (int i = 0; i < N; i += 180) { rec(i, min(i + 179, N-1)); } } //3 if (P == 0.011546) { ++q; for (int i = 0; i < N; i += 160) { rec(i, min(i + 159, N-1)); } } //4 if (P == 0.028545) { for (int i = 0; i < N; i += 140) { rec(i, min(i + 139, N-1)); } } //5 if (P == 0.039856) { ++q; for (int i = 0; i < N; i += 100) { rec(i, min(i + 99, N-1)); } } //6 if (P == 0.068648) { ++q; for (int i = 0; i < N; i += 70) { rec(i, min(i + 69, N-1)); } } //7 if (P == 0.104571) { ++q; for (int i = 0; i < N; i += 30) { rec(i, min(i + 29, N-1)); } } //8 if (P == 0.158765) { ++q; for (int i = 0; i < N; i += 20) { rec(i, min(i + 19, N-1)); } } //9 if (P == 0.2) { ++q; for (int i = 0; i < N; i += 8) { rec(i, min(i + 7, N-1)); } } if (q==0) { vector<bool> mn; mn.resize(N); for (int i = 0; i < N; ++i) { mn[i] = 0; } for (int i = 0; i < N; ++i) { mn[i] = 1; if (test_students(mn) == 0) { ans[i] = -1; } mn[i] = 0; } } for (int i = 0; i < N; ++i) { if (ans[i] == -1) { answer[i] = 0; } else { answer[i] = 1; } } for (int i = 0; i < N; ++i) { ans[i] = 0; } return answer; } int main() { int T; scanf("%d %lf %d", &N, &P, &T); // You may perform any extra initialization here. for (int i = 0; i < T; i++) { std::vector<bool> answer = find_positive(); assert(answer.size() == (size_t)N); std::string answer_str(N, ' '); for (int j = 0; j < N; j++) answer_str[j] = answer[j] ? '1' : '0'; printf("A %s\n", answer_str.c_str()); fflush(stdout); char verdict; scanf(" %c", &verdict); if (verdict == 'W') exit(0); } return 0; }

컴파일 시 표준 에러 (stderr) 메시지

Main.cpp: In function 'bool test_students(std::vector<bool>)':
Main.cpp:59:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   59 |     scanf(" %c", &answer);
      |     ~~~~~^~~~~~~~~~~~~~~~
Main.cpp: In function 'int main()':
Main.cpp:198:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  198 |     scanf("%d %lf %d", &N, &P, &T);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:214:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  214 |         scanf(" %c", &verdict);
      |         ~~~~~^~~~~~~~~~~~~~~~~
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