///#include "minerals.h"
#include <bits/stdc++.h>
#include <cstdlib>
#include <algorithm>
//#define DEBUG
void Solve(int N);
int Query(int x);
void Answer(int x, int y);
typedef std::pair<int,int> pii;
typedef std::pair<int,pii> pip;
int mid(pii k){
return (k.first+k.second)/2;
}
void Solve(int N) {
std::vector<int> vec,bads,oopsie;
for (int i = 1; i != 2*N+1; ++i) {
int x = Query(i);
//std::cout<<x<<"<\n";
if(x!=vec.size()){
vec.push_back(i);
}else {
oopsie.push_back(vec.size()-1);
bads.push_back(i);
}
}
std::vector<pip> queries[N];
bool skip[N]={};
for(int i=0;i!=N;++i){
pip range = {bads[i],pii(0,oopsie[i])};
queries[mid(range.second)].push_back(range);
}
int falta=N;
int last=N;
int curl=0,curr=N-1;
int times=0,c2=0;
while(falta){
for(int i=N-1;i!=-1;--i){
if(!falta)break;
for(auto&x:queries[i]){
x.second.first=std::max(x.second.first,curl);
x.second.second=std::min(x.second.second,curr);
if(mid(x.second)!=i){
queries[mid(x.second)].push_back(x);
continue;
}
auto __ = x;
int p = -1;
if(!skip[i]){
p = Query(x.first);++c2;}
///std::cout<<p<<" "<<i<<"\n";
if(p==last){///Estah contido
__.second.second=i;
}else {
__.second.first=i+1;
}
if(__.second.first!=__.second.second){
queries[mid(__.second)].push_back(__);
//last=Query(x.first);
last=p;
}else {
Answer(x.first,vec[__.second.first]);
skip[__.second.first]=1;
--falta;
last=p;
}
while(curr>0&&skip[curr])--curr;
while(curl<0&&skip[curl])++curl;
}
if(!skip[i]){
last=Query(vec[i]);++times;}
//std::cout<<<<"!\n";
queries[i].clear();
}
for(int i=0;i!=N;++i){
if(!falta)break;
if(!skip[i]){
last=Query(vec[i]);++times;}
for(auto&x:queries[i]){
x.second.first=std::max(x.second.first,curl);
x.second.second=std::min(x.second.second,curr);
if(mid(x.second)!=i){
queries[mid(x.second)].push_back(x);
continue;
}
auto __ = x;
int p = -1;
if(!skip[i]){
p = Query(x.first);++c2;}
// std::cout<<p<<" "<<i<<"\n";
if(p==last){///Estah contido
__.second.second=i;
}else {
__.second.first=i+1;
}
if(__.second.first!=__.second.second){
queries[mid(__.second)].push_back(__);
//last=Query(x.first);
last=p;
}else {
Answer(x.first,vec[__.second.first]);
skip[__.second.first]=1;
--falta;
last=p;
}
while(curr>0&&skip[curr])--curr;
while(curl<0&&skip[curl])++curl;
}
queries[i].clear();
}
}
}
#ifdef DEBUG
constexpr int MAX_N = 43000;
constexpr int MAX_CALLS = 1000000;
namespace {
void WrongAnswer(int code) {
printf("Wrong Answer [%d]\n", code);
exit(0);
}
int N;
int counterpart[2 * MAX_N + 1];
int num_queries;
int num_kinds;
int on[2 * MAX_N + 1];
int count[2 * MAX_N + 1];
int num_answers;
int answer[2 * MAX_N + 1];
} // namespace
int Query(int x) {
if (!(1 <= x && x <= 2 * N)) {
WrongAnswer(1);
}
if (++num_queries > MAX_CALLS) {
// WrongAnswer(2);
}
const int type = std::min(x, counterpart[x]);
if (on[x]) {
--on[x];
--count[type];
if (count[type] == 0) {
--num_kinds;
}
} else {
++on[x];
++count[type];
if (count[type] == 1) {
++num_kinds;
}
}
return num_kinds;
}
void Answer(int a, int b) {
std::cout<<"Match "<<a<<" "<<b<<"\n";
if (++num_answers > N) {
WrongAnswer(6);
}
if (!(1 <= a && a <= 2 * N && 1 <= b && b <= 2 * N)) {
WrongAnswer(3);
}
if (answer[a] != 0) {
WrongAnswer(4);
}
answer[a] = b;
if (answer[b] != 0) {
WrongAnswer(4);
}
answer[b] = a;
if (!(counterpart[a] == b && counterpart[b] == a)) {
WrongAnswer(5);
}
}
int main() {
if (scanf("%d", &N) != 1) {
fprintf(stderr, "Error while reading input\n");
exit(1);
}
std::vector<int> vec;
for(int i=N+1;i!=2*N+1;++i)vec.push_back(i);
std::random_shuffle(vec.begin(),vec.end());
std::vector<int> vec2;
for(int i=1;i!=N+1;++i)vec2.push_back(i);
std::random_shuffle(vec2.begin(),vec2.end());
for (int i = 1; i <= N; ++i) {
int x=vec[i-1], y=vec2[i-1];
//if (scanf("%d%d", &x, &y) != 2) {
//fprintf(stderr, "Error while reading input\n");
//exit(1);
//}
//std::cout<<"Create pair "<<x<<" "<<y<<"\n";
counterpart[x] = y;
counterpart[y] = x;
}
Solve(N);
if (num_answers != N) {
WrongAnswer(6);
}
printf("Accepted: %d\n", num_queries);
return 0;
}
#endif
Compilation message
minerals.cpp: In function 'void Solve(int)':
minerals.cpp:21:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
21 | if(x!=vec.size()){
| ~^~~~~~~~~~~~
minerals.cpp:69:28: warning: array subscript -1 is below array bounds of 'bool [(<anonymous> + 1)]' [-Warray-bounds]
69 | while(curl<0&&skip[curl])++curl;
| ~~~~~~~~~^
minerals.cpp:108:28: warning: array subscript -1 is below array bounds of 'bool [(<anonymous> + 1)]' [-Warray-bounds]
108 | while(curl<0&&skip[curl])++curl;
| ~~~~~~~~~^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
208 KB |
Wrong Answer [4] |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
464 KB |
Output is correct |
| 2 |
Correct |
1 ms |
720 KB |
Output is correct |
| 3 |
Correct |
3 ms |
1104 KB |
Output is correct |
| 4 |
Correct |
5 ms |
2128 KB |
Output is correct |
| 5 |
Correct |
10 ms |
4032 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
208 KB |
Wrong Answer [4] |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
208 KB |
Wrong Answer [4] |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
208 KB |
Wrong Answer [4] |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
208 KB |
Wrong Answer [4] |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
208 KB |
Wrong Answer [4] |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
208 KB |
Wrong Answer [4] |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
208 KB |
Wrong Answer [4] |
| 2 |
Halted |
0 ms |
0 KB |
- |
