Submission #949802

#TimeUsernameProblemLanguageResultExecution timeMemory
949802BaizhoBoat (APIO16_boat)C++14
31 / 100
2561 ms524292 KiB
#include <bits/stdc++.h> using namespace std; #include <ext/pb_ds/assoc_container.hpp> #include <ext/pb_ds/tree_policy.hpp> using namespace __gnu_pbds; #define ordered_set tree<int, null_type,less_equal<int>, rb_tree_tag,tree_order_statistics_node_update> // #pragma GCC optimize("Ofast,unroll-loops,fast-math") // #pragma GCC target("popcnt,avx") typedef long long ll; typedef unsigned long long ull; typedef long double ld; typedef pair<ll,ll> pll; #define sz size() #define ff first #define ss second #define all(a) a.begin(),a.end() #define pb push_back const int mod = ll(1e9)+7; //(b + (a%b)) % b (to mod -1%(10^9+7) correctly in c++ its -1 but its suppose to be 10^9+6 const ll MOD = 998244353; // (a%mod)*(binpow(b,mod-2,mod) = (a/b)%mod const int N = ll(1e6)+100; const int M = ll(2e5) + 100; const long long inf = 5e18; //const long double eps = 1e-15L; ll lcm(ll a, ll b) { return (a / __gcd(a,b))*b; } ll binpow(ll a, ll b, ll m) { ll res=1; a %= m; while(b>0){ if(b&1)res=(res * a) % m; a=(a * a) % m; b/=2; } return res%m;} void Freopen(string Key){ freopen((Key+".in").c_str(), "r", stdin); freopen((Key+".out").c_str(), "w", stdout); } int add(int x) { if(x > mod) return x - mod; return x; } int n, a[505], b[505], t[N * 40], lv[N * 40], rv[N * 40], timer = 1; void update(int v, int tl, int tr, int l, int r, int sum = 0) { if(tl > r || l > tr) return; if(tl == tr) { t[v] = add(t[v] + sum + 1); return; } int tm = (tl + tr) / 2; if(!lv[v]) lv[v] = ++ timer; if(!rv[v]) rv[v] = ++ timer; update(rv[v], tm + 1, tr, l, r, add(sum + t[lv[v]])); update(lv[v], tl, tm, l, r, sum); t[v] = add(t[lv[v]] + t[rv[v]]); } void Baizho() { cin>>n; for(int i = 1; i <= n; i ++) { cin>>a[i]>>b[i]; update(1, 1, 1e9, a[i], b[i]); } cout<<t[1]<<"\n"; } signed main() { // Freopen("nondec"); ios_base::sync_with_stdio(false); cin.tie(0);cout.tie(0); // precalc(); int ttt = 1; // cin>>ttt; for(int i=1; i<=ttt; i++) {Baizho(); } }

Compilation message (stderr)

boat.cpp: In function 'void Freopen(std::string)':
boat.cpp:35:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   35 | void Freopen(string Key){ freopen((Key+".in").c_str(), "r", stdin); freopen((Key+".out").c_str(), "w", stdout); }
      |                           ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
boat.cpp:35:76: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   35 | void Freopen(string Key){ freopen((Key+".in").c_str(), "r", stdin); freopen((Key+".out").c_str(), "w", stdout); }
      |                                                                     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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