25 lines
572 B
C++
25 lines
572 B
C++
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#include <bits/stdc++.h>
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using namespace std;
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typedef struct friends {
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int start, endtime;
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bool operator < (const teman &a) const { return endtime < a.endtime; };
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}teman;
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int main() {
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teman a[100000];
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int n, start = 0, invited = 0;
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cin>>n;
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for(int i=0; i<n; i++) {
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cin>>a[i].start>>a[i].endtime;
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a[i].endtime += a[i].start - 1;
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}
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sort(a, a + n);
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for(int i=0; i < n; i++) {
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if(a[i].start > start) {
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invited++;
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start = a[i].endtime;
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}
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}
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cout<<invited<<'\n';
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return 0;
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}
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