Submission #1092924

#	Time	Username	Problem	Language	Result	Execution time	Memory
1092924		ByeWorld	RMQ (NOI17_rmq)	C++14	0 / 100	1 ms	2652 KiB

rmq

#include <bits/stdc++.h>
#pragma GCC optimize("O3")
#define int long long
#define ll long long
#define pb push_back
#define fi first
#define se second
#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 = 1e5+15;
const int INF = 1e18+10;
const int MOD = 998244353;
const int LOG = 32;

int n, m;
int ans[MAXN], done[MAXN], ri[MAXN];
vector <ipii> vec;
vector <int> add[MAXN];
multiset <int> s;
bool aman = 1;

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 l, r, mn; cin >>l>>r>>mn;
        l++; r++; mn++;
        vec.pb({mn, {l,r}});
        add[l].pb(mn); add[r+1].pb(-mn);
    }

    for(int i=1; i<=n; i++){
        for(auto in : add[i]){
            if(in < 0) s.erase(s.find(-in));
            else s.insert(in);
        }
        if(!s.empty()){
            ans[i] = *(--s.end());
            done[ans[i]] = 1; ri[ans[i]] = i;
        }
    }

    sort(vec.begin(), vec.end());
    for(int i=0; i<vec.size(); i++){
        int id = i, mn = vec[i].se.se, mx = vec[i].se.fi;
        while(i+1<vec.size() && vec[id].fi==vec[i+1].fi){
            i++;
            mn = min(mn, vec[i].se.se); 
            mx = max(mx, vec[i].se.fi);
        }
        if(mx <= mn){
            ri[ vec[i].fi ] = mn;
        } else aman = 0;
    }
    // for(int i=1; i<=n; i++) cout << ri[i] << " \n"[i==n];
    // cout << "ans\n";
    // for(int i=1; i<=n; i++) cout << ans[i] << " \n"[i==n];

    for(int i=1; i<=n; i++){
        if(done[i]) continue;

        for(int j=1; j<=n; j++){
            if(ans[j] == 0){
                ans[j] = i; ri[i] = j;
                break;
            }

            if(ri[ans[j]] == j || ans[j] > i) continue;
            ans[j] = i; ri[i] = j;
            break;
        }
    // cout << "ans\n";
    // for(int p=1; p<=n; p++) cout << ans[p] << " \n"[p==n];
    }

    for(auto [mn, ran] : vec){
        int l=ran.fi, r=ran.se;
        int val = ans[l];
        for(int j=l+1; j<=r; j++) val = min(val, ans[j]);
        if(val != mn) aman = 0;
    }
    for(int i=1; i<=n; i++) done[i] = 0;
    for(int i=1; i<=n; i++)
        done[ans[i]] = 1;
    for(int i=1; i<=n; i++)
        if(!done[i]) aman = 0;
    if(!aman){
        for(int i=1; i<=n; i++) cout << "-1 ";
        cout << '\n';
    } else {
        for(int i=1; i<=n; i++) cout << ans[i]-1 << ' ';
        cout << '\n';
    }
}

Compilation message (stderr)

rmq.cpp: In function 'int main()':
rmq.cpp:48:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, std::pair<long long int, long long int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   48 |     for(int i=0; i<vec.size(); i++){
      |                  ~^~~~~~~~~~~
rmq.cpp:50:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, std::pair<long long int, long long int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   50 |         while(i+1<vec.size() && vec[id].fi==vec[i+1].fi){
      |               ~~~^~~~~~~~~~~
rmq.cpp:80:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   80 |     for(auto [mn, ran] : vec){
      |              ^

• Subtask 1: 0 / 23
• Subtask 2: 0 / 44
• Subtask 3: 0 / 33