Submission #1038975

#	Time	Username	Problem	Language	Result	Execution time	Memory
1038975		Zicrus	Overtaking (IOI23_overtaking)	C++17	0 / 100	0 ms	348 KiB

overtaking

#include <bits/stdc++.h>
#include "overtaking.h"
using namespace std;

typedef long long ll;

vector<ll> tCur, tNxt;
vector<int> s;
int x, m;

void init(int l, int n, vector<ll> t, vector<int> w, int x1, int m1, vector<int> s1) {
    s = s1;
    m = m1;
    x = x1;
    tCur = vector<ll>();
    tNxt = vector<ll>();
    vector<pair<ll, ll>> busses(n);
    for (int i = 0; i < n; i++) {
        busses[i] = {t[i], w[i]};
    }
    sort(busses.begin(), busses.end());

    for (int i = 0; i < n; i++) {
        ll curTime = busses[i].first;
        ll idealNxt = curTime + busses[i].second * (s[1] - s[0]);
        auto iter = lower_bound(tCur.begin(), tCur.end(), curTime);
        ll id = iter - tCur.begin();
        ll mxNxt = id > 0 ? tNxt[id-1] : 0;
        ll nxt = max(idealNxt, mxNxt);
        if (nxt > mxNxt) {
            if (id < tCur.size() && curTime == tCur[id]) {
                tNxt[id] = nxt;
            }
            else {
                auto iter2 = upper_bound(tNxt.begin(), tNxt.end(), nxt);
                tCur.erase(iter, tCur.begin() + (iter2 - tNxt.begin()));
                tNxt.erase(tNxt.begin() + id, iter2);

                tCur.insert(iter, curTime);
                tNxt.insert(tNxt.begin() + id, nxt);
            }
        }
    }
}

ll arrival_time(ll y) {
    ll idealNxt = y + x * (s[1] - s[0]);
    ll id = lower_bound(tCur.begin(), tCur.end(), y) - tCur.begin();
    ll mxNxt = id > 0 ? tNxt[id-1] : 0;
    return max(idealNxt, mxNxt);
}

Compilation message (stderr)

overtaking.cpp: In function 'void init(int, int, std::vector<long long int>, std::vector<int>, int, int, std::vector<int>)':
overtaking.cpp:31:20: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |             if (id < tCur.size() && curTime == tCur[id]) {
      |                 ~~~^~~~~~~~~~~~~

• Subtask 0: 0 / 0
• Subtask 1: 0 / 9
• Subtask 2: 0 / 10
• Subtask 3: 0 / 20
• Subtask 4: 0 / 26
• Subtask 5: 0 / 35