Submission #1339090

#	Time	Username	Problem	Language	Result	Execution time	Memory
1339090		po_rag526	Roller Coaster Railroad (IOI16_railroad)	C++17	Compilation error	0 ms	0 KiB

railroad

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

// #define int long long
// #define fi first
// #define se second
//
// #define sz(a) (int)((a).size())
// #define all(a) (a).begin(), (a).end()
//
// #define lsb(x) (x & (-x))
// #define vi vector<int>
// #define YES { cout << "YES" << endl; return; }
// #define NO { cout << "NO" << endl; return; }
//
// using ll = long long;
// using pii = std::pair<int, int>;

const int NMAX = 16;
const int MSK = (1LL << NMAX);

using namespace std;

vector<int> M[NMAX + 5];
int dp[MSK + 5][NMAX + 5], n;

long long plan_roller_coaster(std::vector<int> s, std::vector<int> t) {
    n = (int) s.size();

    fill(&dp[0][0], &dp[0][0] + (NMAX + 5) * (MSK + 5), INT_MAX);
    for (int i = 0; i < n; ++i) {
        if (s[i] >= 1)
            dp[(1LL << i)][i] = 0;
    }

    for (int msk = 0; msk < (1LL << n); ++msk)
        M[__builtin_popcountll(msk)].push_back(msk);

    for (int b = 0; b < n; ++b) {
        for (auto &msk : M[b]) {
            for (int lst = 0; lst < n; ++lst) {
                if (!(msk & (1LL << lst))) continue;
                if (dp[msk][lst] == INT_MAX) continue;

                for (int nxt = 0; nxt < n; ++nxt) {
                    if ((msk & (1LL << nxt))) continue;

                    int cost = max(0, t[lst] - s[nxt]);
                    int new_msk = (msk | (1LL << nxt));
                    dp[new_msk][nxt] = min(dp[new_msk][nxt], dp[msk][lst] + cost);
                }
            }
        }
    }

    int all = (1LL << n) - 1;
    return *min_element(dp[all], dp[all] + n);
}

#ifndef ONLINE_JUDGE

#include "railroad.h"
#include <cstdio>
#include <cassert>

int main() {
    int n;
    assert(1 == scanf("%d", &n));
    std::vector<int> s(n), t(n);
    for (int i = 0; i < n; ++i)
        assert(2 == scanf("%d%d", &s[i], &t[i]));
    long long ans = plan_roller_coaster(s, t);
    printf("%lld\n", ans);
    return 0;
}

#endif

Compilation message (stderr)

/usr/bin/ld: /tmp/ccaQEH58.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccrQsWK6.o:railroad.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status