Submission #1148928

#TimeUsernameProblemLanguageResultExecution timeMemory
1148928blackslexStrange Device (APIO19_strange_device)C++20
5 / 100
286 ms16948 KiB
#include<bits/stdc++.h> using namespace std; using ll = long long; using pii = pair<ll, ll>; int n; ll a, b, x, y; int main() { scanf("%d %lld %lld", &n, &a, &b); ll m = (a > 1e18 / b ? 1e18 : 1LL * a * b); vector<pii> c; for (int i = 0; i < n; i++) { scanf("%lld %lld", &x, &y); x %= m; y %= m; if (x > y) { c.emplace_back(x, m - 1); c.emplace_back(0, y); } else { c.emplace_back(x, y); } } sort(c.begin(), c.end()); ll ans = 0, st = -1, ed = -2; for (auto &[x, y]: c) { if (x <= ed) ed = max(ed, y); else { ans += ed - st + 1; st = x; ed = y; } } ans += ed - st + 1; printf("%lld", ans); }

Compilation message (stderr)

strange_device.cpp: In function 'int main()':
strange_device.cpp:11:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |     scanf("%d %lld %lld", &n, &a, &b);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
strange_device.cpp:15:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |         scanf("%lld %lld", &x, &y);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~
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