#include<bits/stdc++.h>
#include <cassert>
#include <cstdio>
#include <string>
#include <vector>
using namespace std;
/// You may use:
// The number of students
const int TAILLE_MAX=1000+5;
const double INFINI=1000.0*1000.0*1000.0;
int N,nbTest;
vector<bool> rep;
vector<bool> attendu;
double puis[TAILLE_MAX];
double memo[TAILLE_MAX];
int suiv[TAILLE_MAX];
// 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(vector<bool> mask) {
assert(mask.size() == (size_t)N);
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';
}
/*bool test_students(vector<bool> mask) {
nbTest++;
bool ans=false;
for (int i=0;i<N;i++) {
if (mask[i] and attendu[i]) {
ans=true;
}
}
return ans;
}*/
bool dicho(int deb,int fin,bool assure) {
bool ans;
if (!assure) {
vector<bool> quest;
for (int i=0;i<N;i++) {
if (i>=deb and i<=fin) {
quest.push_back(true);
}
else {
quest.push_back(false);
}
}
ans=test_students(quest);
}
else {
ans=true;
}
if (ans) {
int taille=fin-deb+1;
if (taille==1) {
rep[deb]=true;
}
else {
int mid=deb+suiv[taille]-1;
if (dicho(deb,mid,false)) {
dicho(mid+1,fin,false);
}
else {
dicho(mid+1,fin,true);
}
}
}
return ans;
}
/// 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.
vector<bool> find_positive() {
vector<bool> quest(N,true);
rep.clear();
rep.resize(N,false);
dicho(0,N-1,false);
return rep;
}
void init() {
puis[0]=1.0;
for (int i=1;i<=N;i++) {
puis[i]=puis[i-1]*(1.0-P);
//cout<<puis[i]<<" ";
}
//cout<<endl;
memo[0]=0.0;
memo[1]=0.0;
double esper;
for (int i=2;i<=N;i++) {
memo[i]=INFINI;
for (int j=1;j<i;j++) {
esper=1.0+(1.0-puis[j])/(1.0-puis[i])*(memo[j]+1)+memo[i-j];
if (esper<memo[i]) {
memo[i]=esper;
suiv[i]=j;
}
}
//cout<<i<<" : "<<suiv[i]<<" "<<memo[i]<<endl;
}
//cout<<suiv[1000]<<" "<<memo[1000]<<endl;
}
int main() {
int T;
scanf("%d %lf %d", &N, &P, &T);
init();
// 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;
}
/*int main() {
int T;
cin>>N>>P>>T;
init();
// You may perform any extra initialization here.
char val;
for (int i = 0; i < T; i++) {
attendu.clear();
for (int j=0;j<N;j++) {
cin>>val;
//cout<<val;
attendu.push_back(val=='1');
}
std::vector<bool> answer = find_positive();
for (int j=0;j<N;j++) {
if (attendu[j]!=answer[j]) {
cout<<"PROBLEME"<<" "<<i<<" "<<j<<endl;
return 0;
}
}
}
cout<<nbTest/T<<endl;
cout<<"OK"<<endl;
return 0;
}*/
Compilation message
Main.cpp: In function 'bool test_students(std::vector<bool>)':
Main.cpp:38:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
38 | scanf(" %c", &answer);
| ~~~~~^~~~~~~~~~~~~~~~
Main.cpp: In function 'int main()':
Main.cpp:129:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
129 | scanf("%d %lf %d", &N, &P, &T);
| ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:145:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
145 | scanf(" %c", &verdict);
| ~~~~~^~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
344 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
19 ms |
780 KB |
Output is correct |
| 2 |
Correct |
18 ms |
660 KB |
Output is correct |
| 3 |
Correct |
19 ms |
692 KB |
Output is correct |
| 4 |
Correct |
14 ms |
344 KB |
Output is correct |
| 5 |
Correct |
15 ms |
836 KB |
Output is correct |
| 6 |
Correct |
15 ms |
600 KB |
Output is correct |
| 7 |
Correct |
14 ms |
552 KB |
Output is correct |
| 8 |
Correct |
11 ms |
472 KB |
Output is correct |
| 9 |
Correct |
20 ms |
708 KB |
Output is correct |
| 10 |
Correct |
8 ms |
344 KB |
Output is correct |
| 11 |
Correct |
13 ms |
620 KB |
Output is correct |
| 12 |
Correct |
14 ms |
856 KB |
Output is correct |
| 13 |
Correct |
12 ms |
600 KB |
Output is correct |
| 14 |
Correct |
11 ms |
480 KB |
Output is correct |
| 15 |
Correct |
12 ms |
344 KB |
Output is correct |
| 16 |
Correct |
18 ms |
568 KB |
Output is correct |
| 17 |
Correct |
1 ms |
344 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
56 ms |
344 KB |
Output is correct (P=0.001, F=15.1, Q=18.0) -> 50.90 points |
| 2 |
Correct |
246 ms |
344 KB |
Output is correct (P=0.005256, F=51.1, Q=77.5) -> 29.35 points |
| 3 |
Correct |
473 ms |
344 KB |
Output is correct (P=0.011546, F=94.9, Q=146.5) -> 28.35 points |
| 4 |
Correct |
866 ms |
344 KB |
Output is correct (P=0.028545, F=191.5, Q=275.5) -> 32.67 points |
| 5 |
Correct |
1181 ms |
600 KB |
Output is correct (P=0.039856, F=246.3, Q=359.0) -> 31.80 points |
| 6 |
Correct |
1600 ms |
344 KB |
Output is correct (P=0.068648, F=366.2, Q=491.5) -> 38.00 points |
| 7 |
Correct |
2165 ms |
488 KB |
Output is correct (P=0.104571, F=490.3, Q=688.0) -> 34.44 points |
| 8 |
Correct |
2612 ms |
464 KB |
Output is correct (P=0.158765, F=639.1, Q=846.4) -> 39.17 points |
| 9 |
Correct |
2965 ms |
344 KB |
Output is correct (P=0.2, F=731.4, Q=960.6) -> 39.94 points |
