Submission #839065

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
839065	2023-08-28 14:56:33	fanwen	Subway (info1cup19_subway)	C++17	0 / 100	513 ms	65480 KiB

subway

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/**
 *      author : pham van sam 
 *      created : 28 August 2023 (Monday)
 **/
#include <bits/stdc++.h>
using namespace std;
void you_make_it(void) {
    int k, n; cin >> k;
    for (int i = 1; 1LL * i * (i + 1) <= 2LL * k; ++i) {
      n = i;
    }
    int diff = k - 1LL * n * (n + 1) / 2;
    cout << n + 1 + (diff > 0) << '\n';
  for (int i = 0; i <= n; ++i) {
    cout << i << " " << i - 1 << '\n';
  }
    if(diff > 0) {
      cout << n + 1 << " " << diff  - 1 << '\n';
    }
}
signed main() {
#ifdef LOCAL
    freopen("TASK.inp", "r", stdin);
    freopen("TASK.out", "w", stdout);
#endif
 
 
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Compilation message (stderr)

subway.cpp: In function 'void you_make_it()':
subway.cpp:17:20: warning: 'n' may be used uninitialized in this function [-Wmaybe-uninitialized]
   17 |  for (int i = 0; i <= n; ++i) {
      |                  ~~^~~~

• Subtask 1: 0 / 20
• Subtask 2: 0 / 30
• Subtask 3: 0 / 50