Submission #531187

#TimeUsernameProblemLanguageResultExecution timeMemory
531187Killer2501Fire (JOI20_ho_t5)C++14
14 / 100
420 ms262148 KiB
#include <bits/stdc++.h> #define ll long long #define ld long double #define ull unsigned long long #define pb push_back #define pll pair<ll, ll> #define pii pair<int, ll> #define fi first #define se second using namespace std; const int N = 2e5+5; const int M = 250; const int mod = 1e9+7; const ll base = 75; const ll inf = 1e16; ll n, t, lab[N], c[N], b[N], a[N]; ll ans, tong, d[N], l[N], r[N], fe[N]; ll m, k; vector<pii> adj[N], radj[N]; vector<int> vi, ask[N]; string s, res; struct node { int l, r, t; }q[N]; void add(int id, ll x) { for(; id <= n; id += id & -id)fe[id] += x; } ll get(int id) { ll total = 0; if(id <= 0)return total; for(; id; id -= id & -id)total += fe[id]; return total; } void sol() { cin >> n >> m; for(int i = 1; i <= n; i ++) { cin >> a[i]; while(!vi.empty() && a[i] >= a[vi.back()])vi.pop_back(); l[i] = vi.empty() ? 0 : vi.back(); vi.pb(i); } vi.clear(); for(int i = n; i > 0; i --) { while(!vi.empty() && a[i] >= a[vi.back()])vi.pop_back(); r[i] = vi.empty() ? n+1 : vi.back(); vi.pb(i); } for(int i = 1; i <= n; i ++) { //cout << l[i] <<" "<<r[i] << '\n'; if(!l[i] || i-l[i] > r[i]-i) { for(int j = i; j < r[i]; j ++) { adj[j-i].pb({j, a[i]}); if(l[i])adj[j-l[i]].pb({j, -a[i]}); } } else { for(int j = i; j > l[i]; j --) { radj[i-j].pb({j, a[i]}); if(r[i] <= n)radj[r[i]-j].pb({j, -a[i]}); } } } for(int i = 1; i <= m; i ++) { cin >> q[i].t >> q[i].l >> q[i].r; ask[q[i].t].pb(i); } for(int i = 0; i <= n; i ++) { for(pii j: adj[i])add(j.fi, j.se); for(int j: ask[i])d[j] += get(q[j].r)-get(q[j].l-1); } fill_n(fe, n+1, 0); for(int i = 0; i <= n; i ++) { for(pii j: radj[i])add(j.fi, j.se); for(int j: ask[i])d[j] += get(q[j].r-i) - get(q[j].l-i-1); } for(int i = 1; i <= m; i ++)cout << d[i] << '\n'; } int main() { cin.tie(0); cout.tie(0); ios_base::sync_with_stdio(0); #define task "test" if(fopen(task".inp", "r")) { freopen(task".inp", "r", stdin); freopen(task".out", "w", stdout); } int test = 1; //cin >> test; while(test -- > 0)sol(); return 0; }

Compilation message (stderr)

ho_t5.cpp: In function 'int main()':
ho_t5.cpp:100:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  100 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
ho_t5.cpp:101:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  101 |         freopen(task".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
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