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#include <iostream> #include <vector> #include <algorithm> using namespace std; int main() { int n; int brojac=1; cin>>n; vector<pair<int, int>>v; for(int i=0; i<n; i++){ int a; int b; cin>>a>>b; v.push_back(make_pair(b, a)); } sort(v.begin(), v.end()); int nd=v[0].first; int start=v[0].second; for(int j=1; j<n; j++){ int tnd=v[j].first; int tstart=v[j].second; if(tstart>=nd){ brojac+=1; nd=tnd; start=tstart; } } cout<<brojac; return 0; }
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