This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
#define IO_OP std::ios::sync_with_stdio(0); std::cin.tie(0);
#define F first
#define S second
#define V vector
#define PB push_back
#define EB emplace_back
#define MP make_pair
#define SZ(v) int((v).size())
#define ALL(v) (v).begin(), (v).end()
using namespace std;
typedef long long ll;
typedef pair<int, int> pi;
typedef V<int> vi;
string _reset = "\u001b[0m", _yellow = "\u001b[33m", _bold = "\u001b[1m";
void DBG() { cerr << "]" << _reset << endl; }
template<class H, class...T> void DBG(H h, T ...t) {
cerr << to_string(h);
if(sizeof ...(t)) cerr << ", ";
DBG(t...);
}
#ifdef CHEISSMART
#define debug(...) cerr << _yellow << _bold << "Line(" << __LINE__ << ") -> [" << #__VA_ARGS__ << "]: [", DBG(__VA_ARGS__)
#else
#define debug(...)
#endif
const int INF = 1e9 + 7, N = 2e6 + 7;
int a[N], p[N], down[N];
vi G[N];
void dfs(int u) {
down[u] = 1;
for(int v:G[u]) {
dfs(v);
down[u] = max(down[u], down[v] + 1);
}
}
vi hebe[N];
signed main()
{
IO_OP;
int n, d, t;
cin >> n >> d >> t;
int ans = n;
V<pi> stk, aux;
for(int i = 0; i < n; i++) {
cin >> a[i];
if(a[i] <= t) {
int r = i + t - a[i];
while(SZ(stk) && stk.back().S <= r) stk.pop_back();
stk.EB(i, r);
} else {
while(SZ(stk) && stk.back().S < i) stk.pop_back();
if(SZ(stk)) {
// [stk.back().F, i)
// aux.EB(i, (i + 1));
// aux.EB(stk.back().F, -(i + 1));
aux.EB(i, -1);
aux.EB(stk.back().F, 1);
}
}
}
sort(ALL(aux), less<>());
int mx = 0, cnt = 0;
for(auto[pos, val]:aux) {
if(val > 0) cnt++;
else cnt--;
mx = max(mx, cnt);
}
cout << ans - mx << '\n';
// vi nodes;
// int lst = 0, tp = 1;
// for(auto[pos, op]:aux) {
// int u = abs(op);
// if(op > 0) {
// assert(pos != lst_pos);
// if(tp == 1) p[u] = lst;
// else p[u] = p[lst];
// nodes.PB(u);
// }
// lst = u, tp = op > 0;
// }
// for(int u:nodes) if(p[u]) {
// G[p[u]].PB(u);
// }
// for(int u:nodes) if(!p[u]) {
// dfs(u);
// hebe[down[u]].PB(u);
// }
// function<void(int)> go = [&] (int u) {
// int nxt = -1;
// for(int v:G[u]) if(down[v] + 1 == down[u]) nxt = v;
// for(int v:G[u]) if(v != nxt) hebe[down[v]].PB(v);
// if(nxt != -1)
// go(nxt);
// };
// for(int i = n; i >= 1 && d; i--) {
// while(d && SZ(hebe[i])) {
// int u = hebe[i].back();
// hebe[i].pop_back();
// go(u);
// assert(down[u] == i);
// ans -= i;
// d--;
// }
// }
// cout << ans << '\n';
}
Compilation message (stderr)
prison.cpp: In function 'int main()':
prison.cpp:74:10: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
74 | for(auto[pos, val]:aux) {
| ^
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