Submission #931702

#	Time	Username	Problem	Language	Result	Execution time	Memory
931702		Yazan_Alattar	Advertisement 2 (JOI23_ho_t2)	C++14	69 / 100	524 ms	74816 KiB

Main

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
#define F first
#define S second
#define pb push_back
#define endl "\n"
#define all(x) x.begin(), x.end()
const int M = 1000007;
const ll inf = 1e9;
const ll INF = 1e12;
const ll mod = 1e9 + 7;
const double eps = 1e-6;

pair <ll,ll> a[M];
vector <ll> adj[M];
vector < pair <ll,ll> > order;
priority_queue < pair <ll,ll> > q;
ll n, ans;
bool visit[M], done[M];

void solve(int _){
    cin >> n;
    for(int i = 1; i <= n; ++i){
        cin >> a[i].F >> a[i].S;

        order.pb({a[i].F, i});
        q.push({a[i].S, i});
    }

    sort(all(order));
    for(int i = 0; i < order.size(); ++i){
        if(i > 0) adj[order[i].S].pb(order[i - 1].S);
        if(i + 1 < order.size()) adj[order[i].S].pb(order[i + 1].S);
    }


    while(!q.empty()){
        int i = q.top().S;
        int cost = q.top().F;
        q.pop();

        if(done[i]) continue;
        done[i] = 1;

        if(!visit[i]) ++ans;

        for(auto j : adj[i]){
            int newCost = a[i].S - abs(a[i].F - a[j].F);
            if(newCost >= a[j].S) visit[j] = 1;
            if(newCost > a[j].S){
                a[j].S = newCost;
                q.push({newCost, j});
            }
        }
    }

    cout << ans << endl;
    return;
}

int main(){
    ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    int t = 1;
//    cin >> t;
    for(int i = 1; i <= t; ++i) solve(t);

    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'void solve(int)':
Main.cpp:33:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |     for(int i = 0; i < order.size(); ++i){
      |                    ~~^~~~~~~~~~~~~~
Main.cpp:35:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |         if(i + 1 < order.size()) adj[order[i].S].pb(order[i + 1].S);
      |            ~~~~~~^~~~~~~~~~~~~~
Main.cpp:41:13: warning: unused variable 'cost' [-Wunused-variable]
   41 |         int cost = q.top().F;
      |             ^~~~

• Subtask 1: 10 / 10
• Subtask 2: 23 / 23
• Subtask 3: 36 / 36
• Subtask 4: 0 / 31