This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
using namespace std;
int main() {
cin.tie(0)->sync_with_stdio(0);
int n,m; cin>>n>>m;
vector<pair<int,int>> vpii(m);
for(auto &a:vpii) {
cin>>a.first>>a.second; a.first--,a.second--;
}
auto gogo = [](int a,int b, vector<int> &vi){
if(a<=b)
for(int i = a; i <= b; i++)
vi[i] = 1;
else {
for(int i = a; i < vi.size();i++)
vi[i] = 1;
for(int i = 0; i <= b; i++)
vi[i] = 1;
}
};
for(int i = 0; i < (1<<m);i++) {
vector<int> firstone(n, 0),secondone(n,0);
for(int j = 0; j < m; j++) {
if(i & (1<<j)){
gogo(vpii[j].first,vpii[j].second,firstone);
} else{
// if(i==5)
// cout<<vpii[j].first<<' '<<vpii[j].second<<"\n";
gogo(vpii[j].first,vpii[j].second,secondone);
}
}
if(count(firstone.begin(),firstone.end(),0) == 0 && count(secondone.begin(),secondone.end(),0) == 0)
{
// for(auto a:firstone)
// cout<<a<<' ';
// cout<<"\n";
// for(auto a:secondone)
// cout<<a<<' ';
// cout<<"\n";
for(int j = 0; j < m; j++) {
if(i & (1<<j)){
cout<<1;
} else
cout<<0;
}
cout<<"\n";
return 0;
}
}
cout<<"impossible\n";
}
Compilation message (stderr)
alternating.cpp: In lambda function:
alternating.cpp:15:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
15 | for(int i = a; i < vi.size();i++)
| ~~^~~~~~~~~~~
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