Submission #1013120

#	Time	Username	Problem	Language	Result	Execution time	Memory
1013120		vjudge1	Slagalica (COCI19_slagalica2)	C++17	5 / 70	40 ms	2764 KiB

slagalica

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

int main(){
    int n;
    cin >> n;

    vector<int> vec[10], g[10];
    int lin = 0, lout = 0, rin = 0, rout = 0;
    for (int i = 0; i < n; i ++){
        int x, y;
        cin >> x >> y;
        vec[x].push_back(y);

        lin += (x == 3 or x == 4 or x == 8);
        lout += (x == 1 or x == 2 or x == 7);
        rin += (x == 2 or x == 4 or x == 6);
        rout += (x == 1 or x == 3 or x == 5);
    }
    for (int i = 1; i <= 8; i ++)
        sort(vec[i].rbegin(), vec[i].rend());

    int f = 5;
    if (vec[6].size()) f = 6;
    int l = 7;
    if (vec[8].size()) l = 8;

    int c1 = vec[1].size();
    int c2 = vec[2].size();
    int c3 = vec[3].size();
    int c4 = vec[4].size();

    if (abs(c1 - c4) >= 2){
        cout << -1 << endl;
        return 0;
    }

    if (c1 > c4 and l == 7){
        cout << -1 << endl;
        return 0;
    }
    if (c1 < c4 and l == 8){
        cout << -1 << endl;
        return 0;
    }
    if (c1 == c4 and ((f==6 and l==8) or (f==5 and l==7))){
        cout << -1 << endl;
        return 0;
    }
    

    g[5] = {3, 4};
    g[6] = {1, 2};
    g[1] = {3, 4, 8};
    g[2] = {1, 2, 7};
    g[3] = {3, 4, 8};
    g[4] = {1, 2, 7};

    vector<int> answer, types;
    int lm = 1, rm;
    for (int x : vec[5]){
        answer.push_back(x);
        types.push_back(5);
        rout--;
        lm = 1;
    }
    for (int x : vec[6]){
        answer.push_back(x);
        types.push_back(6);
        rin--;
        lm = 0;
    }

    if (vec[7].size())
        rm = 1;
    else
        rm = 0;

    while (1){
        int last = types.back();
        int min_t = -1;
        for (int t : g[last]){
            if (vec[t].size() == 0) continue;
            if (t == 3 and vec[1].size() == 0){
                min_t = 3;
                break;
            }
            if (t == 1 and vec[1].size() == 1 and vec[2].size() > 0) continue;
            if (vec[t].size() and (min_t == -1 or vec[min_t].back() > vec[t].back()))
                min_t = t;
        }

        bool all = 1;
        for (int i = 1; i <= 4; i ++)
            all &= (vec[i].size() == 0);
        if (all) break;

        if (!all and min_t == -1){
            cout << -1 << endl;
            return 0;
        } 

        types.push_back(min_t);
        answer.push_back(vec[min_t].back());
        vec[min_t].pop_back();
    }

    int last = types.back();
    int have = 7;
    if (vec[8].size()) have = 8;

    if ((have == 7 and (last == 2 or last == 4)) or (have == 8 and (last == 1 or last == 3)))
        answer.push_back(vec[have][0]);
    else{
        cout << -1 << endl;
        return 0;
    }

    for (int x : answer)
        cout << x << " ";
    cout << endl;
}

Compilation message (stderr)

slagalica.cpp: In function 'int main()':
slagalica.cpp:29:9: warning: unused variable 'c2' [-Wunused-variable]
   29 |     int c2 = vec[2].size();
      |         ^~
slagalica.cpp:30:9: warning: unused variable 'c3' [-Wunused-variable]
   30 |     int c3 = vec[3].size();
      |         ^~
slagalica.cpp:60:9: warning: variable 'lm' set but not used [-Wunused-but-set-variable]
   60 |     int lm = 1, rm;
      |         ^~
slagalica.cpp:60:17: warning: variable 'rm' set but not used [-Wunused-but-set-variable]
   60 |     int lm = 1, rm;
      |                 ^~

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