Submission #502994

#	Time	Username	Problem	Language	Result	Execution time	Memory
502994		kevin	Robots (IOI13_robots)	C++17	76 / 100	3038 ms	33772 KiB

robots

#include "robots.h"
#include <bits/stdc++.h>

using namespace std;

#define ll long long
#define nl cout<<"\n"
#define s second
#define f first
#define all(x) x.begin(), x.end()
#define ca(v) for(auto i:v) cout<<i<<" ";

bool solve(int m, vector<int> &X, vector<int> &Y, vector<pair<int, int>> &T){
    multiset<pair<int, int>> st;
    for(int i:X) st.insert({i, m});
    vector<pair<int, int>> P1;
    vector<pair<int, int>> P2;
    for(auto p:T) P1.push_back(p);
    sort(all(P1));
    while(P1.size()){
        auto c = P1.back(); P1.pop_back();
        auto it = st.upper_bound({c.s, m+1});
        if(it != st.end()){
            auto nxt = *it; st.erase(it);
            nxt.s--;
            if(nxt.s) st.insert(nxt);
        }
        else{
            P2.push_back({c.s, c.f});
        }
    }
    sort(all(P2));
    st.clear();
    for(int i:Y) st.insert({i, m});
    while(P2.size()){
        auto c = P2.back(); P2.pop_back();
        auto it = st.upper_bound({c.s, m+1});
        if(it != st.end()){
            auto nxt = *it; st.erase(it);
            nxt.s--;
            if(nxt.s) st.insert(nxt);
        }
        else{
            return false;
        }
    }
    return true;
}
int putaway(int A, int B, int N, int x[], int y[], int w[], int s[]){
    vector<int> X, Y, W, S;
    for(int i=0; i<A; i++) X.push_back(x[i]);
    for(int i=0; i<B; i++) Y.push_back(y[i]);
    for(int i=0; i<N; i++) W.push_back(w[i]);
    for(int i=0; i<N; i++) S.push_back(s[i]);
    sort(all(X));
    sort(all(Y));
    int ans = N+1;
    int l = 1;
    int r = N;
    vector<pair<int, int>> T;
    for(int i=0; i<N; i++) T.push_back({S[i], W[i]});
    while(l <= r){
        int m = (l + r) / 2;
        if(solve(m, X, Y, T)){
            ans = m;
            r = m-1;
        }
        else l = m+1;
    }
    if(ans == N+1) return -1;
    return ans;
}

• Subtask 1: 14 / 14
• Subtask 2: 0 / 14
• Subtask 3: 25 / 25
• Subtask 4: 37 / 37
• Subtask 5: 0 / 10