Submission #1267287

#TimeUsernameProblemLanguageResultExecution timeMemory
1267287hoa208Strange Device (APIO19_strange_device)C++20
10 / 100
5093 ms589824 KiB
#include<bits/stdc++.h> using namespace std; #define ll long long #define FOR(i, a, b) for (int i = (a), _b = (b); i <= _b; i++) #define FORD(i, b, a) for (int i = (b), _a = (a); i >= _a; i--) #define pa pair<ll, ll> #define fi first #define se second #define bit(mask, j) ((mask >> j) & 1) const ll mod = 1e9 + 7; const ll INF = 1e18; //-------------------------------------------------------------------- ll n, A, B; map<pa, bool> mp; void hbmt() { cin >> n >> A >> B; ll cnt = 0; FOR(i, 1, n) { ll l, r; cin >> l >> r; for(ll j = l; j <= r; j++) { ll x = (j + (j / B)) % A; ll y = j % B; if(mp.find({x, y}) == mp.end()) { cnt++; mp[{x, y}] = 1; } } } cout << cnt; } int main() { ios_base::sync_with_stdio(0); cin.tie(0);cout.tie(0); #define NAME "hbmt" if(fopen(NAME".inp", "r")) { freopen(NAME".inp", "r", stdin); freopen(NAME".out", "w", stdout); } //int t;cin>>t;while(t--) hbmt(); return 0; }

Compilation message (stderr)

strange_device.cpp: In function 'int main()':
strange_device.cpp:42:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   42 |         freopen(NAME".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
strange_device.cpp:43:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   43 |         freopen(NAME".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
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