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#include <iostream> #include <vector> #include <algorithm> using namespace std; int main() { int n, m, k; cin >> n >> m >> k; int a[n], b[m]; for(int i = 0; i < n; i++) { cin >> a[i]; } for(int i = 0; i < m; i++) { cin >> b[i]; } sort(a, a + n); sort(b, b + m); int i = 0, j = 0; int s = 0; while(i < n and j < m) { if(abs(a[i] - b[j]) <= k) { i++; j++; s++; continue; } if(a[i] < b[j]) { i++; } else { j++; } } cout << s << endl; return 0; } /* 4 3 5 45 60 60 80 50 60 75 **/
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