Submission #1222992

#	Time	Username	Problem	Language	Result	Execution time	Memory
1222992		ByeWorld	RMQ (NOI17_rmq)	C++17	100 / 100	96 ms	14916 KiB

rmq

#include <bits/stdc++.h>
#pragma GCC optimize("O3")
// #define int long long
#define ll long long
#define se second
#define fi first
#define pb push_back
#define lf (id<<1)
#define rg ((id<<1)|1)
#define md ((l+r)>>1)
using namespace std;
typedef pair<int,int> pii;
typedef pair<int,pii> ipii;
const int MAXN = 2e5+10;
const int MAXA = 5e7+10;
const int SQRT = 450;
const int INF = 1e9;
const int MOD = 998244353;
const int LOG = 20;
int sum(int a, int b){ a%=MOD; b%=MOD; return (a+MOD+b)%MOD; }
void chsum(int &a, int b){ a%=MOD; b%=MOD; a = (a+MOD+b)%MOD; }
int mul(int a, int b){ return (a*b)%MOD; }
int expo(int a, int b){
	if(b==0) return 1;
	int te = expo(a, b/2); te = mul(te,te);
	return (b%2 ? mul(te,a) : te);
}
void chmul(int &a, int b){ a = (a*b)%MOD; }
void chmn(auto &a, auto b){ a = min(a, b); }
void chmx(auto &a, auto b){ a = max(a, b); }

int n, m, ans[MAXN];
vector<pii> vec[MAXN];
bool can = 1;
int ban[MAXN];
int le[MAXN], ri[MAXN];

struct seg {
	pii st[4*MAXN]; int laz[4*MAXN];
	void bd(int id, int l, int r){
		laz[id] = 0;
		if(l==r){
			st[id] = {0, l}; return;
		}
		bd(lf,l,md); bd(rg,md+1,r);
		st[id] = min(st[lf], st[rg]);
	}
	void bnc(int id, int l, int r){
		if(laz[id] == 0) return;
		st[lf].fi += laz[id]; laz[lf] += laz[id];
		st[rg].fi += laz[id]; laz[rg] += laz[id];
		laz[id] = 0;
	}
	pii que(int id, int l, int r, int x, int y){
		if(x<=l && r<=y) return st[id];
		if(r<x || y<l) return pii(INF, INF);
		bnc(id,l,r);
		return min(que(lf,l,md,x,y), que(rg,md+1,r,x,y));
	}
	pii upd(int id, int l, int r, int x, int y, int p){
		if(x<=l && r<=y){
			laz[id] += p; st[id].fi += p; return st[id];
		}
		if(r<x || y<l) return st[id];
		bnc(id,l,r);
		return st[id] = min(upd(lf,l,md,x,y,p), upd(rg,md+1,r,x,y,p));
	}
} A;
signed main(){
	ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	cin>>n>>m;
	for(int i=1; i<=m; i++){
		int x, y, p; cin>>x>>y>>p; x++; y++; p++;
		vec[p].pb({x,y});
	}
	vec[1].pb({1,n});

	A.bd(1,1,n);
	for(int i=n; i>=1; i--){
		if(vec[i].empty()) continue;	
		sort(vec[i].begin(), vec[i].end());
		int mn = INF, mx = -1;
		for(auto [l, r] : vec[i]) chmn(mn, r), chmx(mx, r);

		if(mn < vec[i].back().fi) can = 0; 

		pii ret = A.que(1,1,n,vec[i].back().fi,mn);
		// for(int j=vec[i].back().fi; j<=mn; j++){
		// 	if(ban[j] == 0){
		// 		ans[j] = i, ada = 1; break;
		// 	}
		// }
	// for(int j=1; j<=n; j++) cout << ans[j] << " \n"[j==n];
	// 	cout << " pp\n";
		if(ret.fi != 0) can = 0;
		else {
			int idx = ret.se;
			ans[idx] = i;
		}
		// cout << can << " can\n";

		// le - ri gk boleh dipake
		le[i] = vec[i][0].fi; ri[i] = mx;
		A.upd(1,1,n,le[i],ri[i],1);
		// for(int j=le[i]; j<=ri[i]; j++) ban[j]++;
	}
	
	for(int i=1; i<=n; i++){
		if(ans[i]!=0) A.upd(1,1,n,i,i,INF);
	}

	for(int i=1; i<=n; i++){
		if(!vec[i].empty()){
			A.upd(1,1,n,le[i],ri[i], -1);
			// for(int j=le[i]; j<=ri[i]; j++) ban[j]--;
			continue;
		}

		pii ret = A.que(1,1,n,1,n);
		if(ret.fi != 0) can = 0;
		else {
			ans[ret.se] = i; A.upd(1,1,n,ret.se,ret.se,INF);
		}
		// cout << can << " can\n";
	}
	for(int i=1; i<=n; i++)
		if(ans[i]==0) can = 0;

	if(!can){
		for(int i=1; i<=n; i++) cout << "-1 ";
		cout << '\n'; exit(0);
	}
	for(int i=1; i<=n; i++) cout << ans[i]-1 << " \n"[i==n];
}

Compilation message (stderr)

rmq.cpp:29:11: warning: use of 'auto' in parameter declaration only available with '-std=c++20' or '-fconcepts'
   29 | void chmn(auto &a, auto b){ a = min(a, b); }
      |           ^~~~
rmq.cpp:29:20: warning: use of 'auto' in parameter declaration only available with '-std=c++20' or '-fconcepts'
   29 | void chmn(auto &a, auto b){ a = min(a, b); }
      |                    ^~~~
rmq.cpp:30:11: warning: use of 'auto' in parameter declaration only available with '-std=c++20' or '-fconcepts'
   30 | void chmx(auto &a, auto b){ a = max(a, b); }
      |           ^~~~
rmq.cpp:30:20: warning: use of 'auto' in parameter declaration only available with '-std=c++20' or '-fconcepts'
   30 | void chmx(auto &a, auto b){ a = max(a, b); }
      |                    ^~~~

• Subtask 1: 23 / 23
• Subtask 2: 44 / 44
• Subtask 3: 33 / 33