Submission #379097

#	Time	Username	Problem	Language	Result	Execution time	Memory
379097		bibabas	Slagalica (COCI19_slagalica2)	C++14	70 / 70	64 ms	3840 KiB

slagalica

// #define _FORTIFY_SOURCE 0 
// #pragma GCC optimize("Ofast") 
// #pragma GCC optimize("no-stack-protector") 
// #pragma GCC optimize("unroll-loops") 
// //#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,tune=native") 
// #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx") 
// #pragma GCC optimize("inline") 
// #pragma GCC optimize("-fgcse") 
// #pragma GCC optimize("-fgcse-lm") 
// #pragma GCC optimize("-fipa-sra") 
// #pragma GCC optimize("-ftree-pre") 
// #pragma GCC optimize("-ftree-vrp") 
// #pragma GCC optimize("-fpeephole2") 
// #pragma GCC optimize("-ffast-math") 
// #pragma GCC optimize("-fsched-spec") 
// #pragma GCC optimize("unroll-loops") 
// #pragma GCC optimize("-falign-jumps") 
// #pragma GCC optimize("-falign-loops") 
// #pragma GCC optimize("-falign-labels") 
// #pragma GCC optimize("-fdevirtualize") 
// #pragma GCC optimize("-fcaller-saves") 
// #pragma GCC optimize("-fcrossjumping") 
// #pragma GCC optimize("-fthread-jumps") 
// #pragma GCC optimize("-funroll-loops") 
// #pragma GCC optimize("-fwhole-program") 
// #pragma GCC optimize("-freorder-blocks") 
// #pragma GCC optimize("-fschedule-insns") 
// #pragma GCC optimize("inline-functions") 
// #pragma GCC optimize("-ftree-tail-merge") 
// #pragma GCC optimize("-fschedule-insns2") 
// #pragma GCC optimize("-fstrict-aliasing") 
// #pragma GCC optimize("-fstrict-overflow") 
// #pragma GCC optimize("-falign-functions") 
// #pragma GCC optimize("-fcse-skip-blocks") 
// #pragma GCC optimize("-fcse-follow-jumps") 
// #pragma GCC optimize("-fsched-interblock") 
// #pragma GCC optimize("-fpartial-inlining") 
// #pragma GCC optimize("no-stack-protector") 
// #pragma GCC optimize("-freorder-functions") 
// #pragma GCC optimize("-findirect-inlining") 
// #pragma GCC optimize("-fhoist-adjacent-loads") 
// #pragma GCC optimize("-frerun-cse-after-loop") 
// #pragma GCC optimize("inline-small-functions") 
// #pragma GCC optimize("-finline-small-functions") 
// #pragma GCC optimize("-ftree-switch-conversion") 
// #pragma GCC optimize("-foptimize-sibling-calls") 
// #pragma GCC optimize("-fexpensive-optimizations") 
// #pragma GCC optimize("-funsafe-loop-optimizations") 
// #pragma GCC optimize("inline-functions-called-once") 
// #pragma GCC optimize("-fdelete-null-pointer-checks")
#include <bits/stdc++.h>

using namespace std;
         
#define ll long long
#define ull unsigned ll
#define vi vector<ll>
#define vvi vector<vi>
#define all(x) x.begin(), x.end()
#define pb push_back
#define mp make_pair
#define ld long double
#define pii pair<ll, ll>
#define mt make_tuple
#define mn(a, b) a = min(a, b)
#define mx(a, b) a = max(a, b)
#define base complex<ld>
 
using namespace std;
const ll INF = (ll)2e9;
const ll inf = (ll)1e18;
const ld eps = (ld)1e-12;
const ll mod = (ll)1e9 + 7;
const ll p = 31;
const ll mod2 = (ll)1e9 + 7;
const ll MAXN = (ll)1000 + 3;
const ll MAXC = (ll)1e6 + 11;
const ll MAXE = (ll)100;
const ll MAXLOG = (ll)19;
const ll asci = (ll)256;
const ll block = 31623;
const ld PI = acos(-1LL);
const ld e = 2.7182818284;
         
// #include <ext/pb_ds/assoc_container.hpp>
// #include <ext/pb_ds/tree_policy.hpp>
// using namespace __gnu_pbds;
// typedef tree<
// pii,
// null_type,
// less<pii>,
// rb_tree_tag,
// tree_order_statistics_node_update>
// ordered_set;

ll int_rand() {
    if (RAND_MAX == (1LL << 15) - 1LL) {
        return (rand() << 15) + rand();
    }
    return rand();
}

ll ll_rand() {
    return ((ll)int_rand() << 30LL) + int_rand();
}

istream& operator >>(istream &in, pii &x) {
    cin >> x.first >> x.second;
    return in;
}
         
template <class T>
istream& operator >>(istream &in, vector<T> &arr){
    for (T &cnt : arr) {
        in >> cnt;
    }
    return in;
}

bool can_do(vi puzzle, int st, int end) {
    if (st == 0 && end == 0) {
        if (puzzle[0] == puzzle[3]) {
            if (puzzle[2] && !puzzle[0]) return 0;
            return 1;
        }
        return 0;
    }
    if (st == 0 && end == 1) {
        if (puzzle[0] - puzzle[3] == 1) return 1;
        return 0;
    }
    if (st == 1 && end == 0) {
        if (puzzle[3] - puzzle[0] == 1) return 1;
        return 0;
    }
    if (st == 1 && end == 1) {
        if (puzzle[0] == puzzle[3]) {
            if (puzzle[1] && !puzzle[3]) return 0;
            return 1;
        }
        return 0;
    }
    return 0;
}

void solve() {
    int n; cin >> n;
    vector<deque<int>> a(8);
    for (int i = 0; i < n; ++i) {
        int x, c; cin >> x >> c;
        a[x - 1].push_back(c);
    }
    if (a[4].size() + a[5].size() != 1) {
        cout << "-1\n";
        return;
    }
    if (a[6].size() + a[7].size() != 1) {
        cout << "-1\n";
        return;
    }
    vi ind(2);
    vi ans(n);
    vi puzzle(4);
    for (int i = 0; i < 4; ++i) {
        sort(all(a[i]));
        puzzle[i] = a[i].size();
    }
    for (int i = 4; i < 8; ++i) { 
        if (a[i].size()) {
            ind[(i & 2) >> 1] = (i & 1) ^ ((i & 2) >> 1) ^ 1;
            if ((i & 2) >> 1) ans[n - 1] = a[i][0];
            else ans[0] = a[i][0];
            a[i].pop_back();
        }
    }
    if (!can_do(puzzle, ind[0], ind[1])) {
        cout << "-1\n";
        return;
    }
    for (int i = 1; i < n - 1; ++i) {
        vector<pii> fin;
        for (int j = 0; j < 4; ++j) if (a[j].size()) fin.push_back(mp(a[j].front(), j)); 
        sort(all(fin));
        for (int j = 0; j < fin.size(); ++j) {
            if (((fin[j].second & 2) >> 1) == ind[0]) {
                puzzle[fin[j].second]--;
                if (can_do(puzzle, (fin[j].second & 1) ^ 1, ind[1])) {
                    ind[0] = (fin[j].second & 1) ^ 1;
                    ans[i] = a[fin[j].second].front();
                    a[fin[j].second].pop_front();
                    break;
                }
                puzzle[fin[j].second]++;
            }
        }
    }
    for (int i : ans) cout << i << " ";
}

signed main() {
    srand(time(0LL));
#ifdef LOCAL
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#else
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr); 
#endif
    cout.precision(30);
    
    solve();

    return 0LL;
}

Compilation message (stderr)

slagalica.cpp: In function 'void solve()':
slagalica.cpp:184:27: 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]
  184 |         for (int j = 0; j < fin.size(); ++j) {
      |                         ~~^~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 5 / 5
• Subtask 4: 5 / 5
• Subtask 5: 5 / 5
• Subtask 6: 5 / 5
• Subtask 7: 5 / 5
• Subtask 8: 5 / 5
• Subtask 9: 5 / 5
• Subtask 10: 5 / 5
• Subtask 11: 5 / 5
• Subtask 12: 5 / 5
• Subtask 13: 5 / 5
• Subtask 14: 5 / 5