Submission #634214

#	Time	Username	Problem	Language	Result	Execution time	Memory
634214		HaYoungJoon	Slagalica (COCI19_slagalica2)	C++14	20 / 70	34 ms	2980 KiB

slagalica

#include <bits/stdc++.h>
#define fi first
#define se second

using namespace std;

typedef pair<int,int> pii;
pii change[9];
int n;
vector<int> type[9];

void makeChange() {
    change[1] = pii(1,1);
    change[2] = pii(1,2);
    change[3] = pii(2,1);
    change[4] = pii(2,2);
    change[5] = pii(0,1);
    change[6] = pii(0,2);
    change[7] = pii(1,0);
    change[8] = pii(2,0);
}

int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0);
    cin >> n;
    makeChange();
    for (int i = 1; i <= n; i++) {
        int t,id;
        cin >> t >> id;
        type[t].push_back(id);
    }
    for (int i = 1; i <= 4; i++) sort(type[i].begin(),type[i].end(),greater<int> {});
    int st = (type[5].empty()) ? 6: 5;
    int fin = (type[7].empty()) ? 8: 7;
    vector<pii> res;
    res.push_back(pii(st,type[st].back()));
    bool found = 1;
    int pre = change[st].second;
    while (found) {
        int id;
        if (pre == 1) {
            if (type[3].empty() && type[4].empty()) found = 0;
            else if (type[3].empty() || type[4].back() < type[3].back()) {
                res.push_back(pii(4,type[4].back()));
                type[4].pop_back();
                id = 4;
            } else {
                res.push_back(pii(3,type[3].back()));
                type[3].pop_back();
                id = 3;
            }
        } else {
            if (type[1].empty() && type[2].empty()) found = 0;
            else if (type[1].empty() || type[2].back() < type[1].back()) {
                res.push_back(pii(2,type[2].back()));
                type[2].pop_back();
                id = 2;
            } else {
                res.push_back(pii(1,type[1].back()));
                type[1].pop_back();
                id = 1;
            }
        }
        if (found) pre = change[id].second;
    }
    if (change[res.back().first].second == change[fin].first) {
        cout << -1;
        return 0;
    }
    if (!type[1].empty()) {
        cout << -1;
        return 0;
    }
    if (!type[4].empty()) {
        cout << -1;
        return 0;
    }
    int id;
    if (type[2].empty() && type[3].empty()) {
        res.push_back(pii(fin,type[fin].back()));
        for (pii i: res) cout << i.second << ' ';
        return 0;
    } else id = (type[2].empty()) ? 3: 2;
    int pos;
    for (int i = res.size() - 1; i >= 0; i--) {
        if (change[res[i].first].second != change[id].first) {
            pos = i;
            break;
        }
    }
    for (int i = 0; i <= pos; i++) cout << res[i].second << ' ';
    for (int i = type[id].size() - 1; i >= 0; i--) cout << type[id][i] << ' ';
    res.push_back(pii(fin,type[fin].back()));
    for (int i = pos+1; i < res.size(); i++) cout << res[i].second << ' ';
    return 0;
}

Compilation message (stderr)

slagalica.cpp: In function 'int main()':
slagalica.cpp:95:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   95 |     for (int i = pos+1; i < res.size(); i++) cout << res[i].second << ' ';
      |                         ~~^~~~~~~~~~~~
slagalica.cpp:95:14: warning: 'pos' may be used uninitialized in this function [-Wmaybe-uninitialized]
   95 |     for (int i = pos+1; i < res.size(); i++) cout << res[i].second << ' ';
      |              ^

• Subtask 1: 0 / 5
• Subtask 2: 5 / 5
• Subtask 3: 0 / 5
• Subtask 4: 0 / 5
• Subtask 5: 0 / 5
• Subtask 6: 0 / 5
• Subtask 7: 0 / 5
• Subtask 8: 0 / 5
• Subtask 9: 0 / 5
• Subtask 10: 5 / 5
• Subtask 11: 5 / 5
• Subtask 12: 0 / 5
• Subtask 13: 0 / 5
• Subtask 14: 5 / 5