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  1. // Link : https://r...content-available-to-author-only...e.com/editorial/codeforces-round-1068-div-2
  2. #include <bits/stdc++.h>
  3. using namespace std;
  4.  
  5. int main() {
  6.     ios_base::sync_with_stdio(false);
  7.     cin.tie(nullptr);
  8.  
  9.     int t;
  10.     cin >> t;
  11.  
  12.     while (t--) {
  13.         int n, q;
  14.         cin >> n >> q;
  15.  
  16.         vector<long long> a(n + 1);
  17.         vector<long long> prefix(n + 1, 0);
  18.  
  19.         for (int i = 1; i <= n; i++) {
  20.             cin >> a[i];
  21.             prefix[i] = prefix[i - 1] + a[i];
  22.         }
  23.  
  24.         while (q--) {
  25.             int l, r;
  26.             long long x;
  27.             cin >> l >> r >> x;
  28.  
  29.             // Step 1: Binary search for threshold position
  30.             // Find first position in [l, r] where a[pos] < x
  31.             int threshold = r + 1;
  32.             int left = l, right = r;
  33.             while (left <= right) {
  34.                 int mid = left + (right - left) / 2;
  35.                 if (a[mid] < x) {
  36.                     threshold = mid;
  37.                     right = mid - 1;
  38.                 } else {
  39.                     left = mid + 1;
  40.                 }
  41.             }
  42.  
  43.             // Step 2: Count fast clears (each element >= x causes one clear)
  44.             long long clears = threshold - l;
  45.  
  46.             // Step 3: Simulate slow zone with binary search on prefix sums
  47.             long long current_sum = 0;
  48.             int pos = threshold;
  49.  
  50.             while (pos <= r) {
  51.                 // Find smallest j where prefix[j] >= prefix[pos-1] + (x - current_sum)
  52.                 long long target = prefix[pos - 1] + (x - current_sum);
  53.  
  54.                 int next_overflow = -1;
  55.                 left = pos;
  56.                 right = r;
  57.                 while (left <= right) {
  58.                     int mid = left + (right - left) / 2;
  59.                     if (prefix[mid] >= target) {
  60.                         next_overflow = mid;
  61.                         right = mid - 1;
  62.                     } else {
  63.                         left = mid + 1;
  64.                     }
  65.                 }
  66.  
  67.                 if (next_overflow == -1) {
  68.                     // No overflow - add remaining elements to final sum
  69.                     current_sum += prefix[r] - prefix[pos - 1];
  70.                     break;
  71.                 } else {
  72.                     // Clear triggered at position next_overflow
  73.                     clears++;
  74.                     current_sum = 0;
  75.                     pos = next_overflow + 1;
  76.                 }
  77.             }
  78.  
  79.             cout << clears << " " << current_sum << "\n";
  80.         }
  81.     }
  82.  
  83.     return 0;
  84. }
Runtime error #stdin #stdout 0.01s 5320KB
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-
https://ideone.com/3i3StX
language:
C++ (gcc 8.3)
created:
65 days ago
visibility:
secret

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