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#210040#6414. Classical Maximization ProblemConfucianDonutWA 3ms27184kbC++143.0kb2023-10-10 22:41:242023-10-10 22:41:24

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  • [2023-10-10 22:41:24]
  • 评测
  • 测评结果:WA
  • 用时:3ms
  • 内存:27184kb
  • [2023-10-10 22:41:24]
  • 提交

answer

#include <iostream>
#include <vector>
#include <map>

using namespace std;

vector <pair <int,int> > graph[1000000];
vector <pair <int,int> > pairs;
vector <int> notpaired;

bool hv[1000000];
bool hu[1000000];

int n;

void makepairs(int p, int par) {
    hv[p] = true;
    for (int i=0; i<graph[p].size(); i++) {
        if (!hv[graph[p][i].first]) {
            makepairs(graph[p][i].first,graph[p][i].second);
        }
    }
    int prev = -1;
    cout << p << endl;
    for (int i=0; i<graph[p].size(); i++) {
        cout << graph[p][i].second << " " << hu[graph[p][i].second] << " " << prev << endl;
        if (graph[p][i].second == par) {
            continue;
        }
        if (!hu[graph[p][i].second]) {
            if (prev==-1) {
                prev = graph[p][i].second;
            }else {
                pairs.push_back(make_pair(prev,graph[p][i].second));
                cout << "CREATE PAIR:" << prev << " " << graph[p][i].second << endl;
                hu[prev] = true;
                prev = -1;
                hu[graph[p][i].second] = true;
            }
        }
    }
    if (prev!=-1&&par!=-1) {
        cout << "CREATE PAIR:" << prev << " " << par << endl;
        hu[prev] = true;
        hu[par] = true;
        pairs.push_back(make_pair(prev,par));
    }
}

int main() {
    int t;
    cin >> t;
    for (int asdf = 0; asdf<t; asdf++) {
        cin >> n;
        n = n*2;
        for (int i=0; i<n; i++) {
            graph[i].clear();
            hv[i] = false;
            hu[i] = false;
        }
        int x,y;
        pair <int,int> points[n];
        pairs.clear();
        notpaired.clear();
        map <int,int> xp;
        map <int,int> yp;
        for (int i=0; i<n; i++) {
            cin >> points[i].first >> points[i].second;
            xp[points[i].first] = 0;
            yp[points[i].second] = 0;
        }
        int c = 0;
        for (map<int,int>::iterator it=xp.begin(); it!=xp.end(); it++) {
            it->second = c;
            c++;
        }
        c = 0;
        for (map<int,int>::iterator it=yp.begin(); it!=yp.end(); it++) {
            it->second = c;
            c++;
        }
        int u,v;
        for (int i=0; i<n; i++) {
            u = xp[points[i].first];
            v = yp[points[i].second]+n;
            graph[u].push_back(make_pair(v,i));
            graph[v].push_back(make_pair(u,i));
        }
        for (int i=0; i<n; i++) {
            if (!hv[i]) {
                makepairs(i,-1);
            }
        }
        cout << "ANS:" <<  pairs.size() << endl;
        for (int i=0; i<pairs.size(); i++) {
            cout << pairs[i].first+1 << " " << pairs[i].second+1 << endl;
        }
        for (int i=0; i<n; i++) {
            if (!hu[i]) {
                notpaired.push_back(i);
            }
        }
        for (int i=0; i<notpaired.size(); i++) {
            cout << notpaired[i]+1 << " " << notpaired[i+1]+1 << endl;
            i++;
        }
    }
}

详细

Test #1:

score: 0
Wrong Answer
time: 3ms
memory: 27184kb

input:

3
2
0 0
0 1
1 0
1 1
2
0 0
0 1
0 2
0 3
2
0 0
1 1
2 2
3 3

output:

5
1 0 -1
3 0 1
CREATE PAIR:1 3
1
2 0 -1
3 1 -1
4
0 0 -1
2 0 -1
CREATE PAIR:2 0
0
0 1 -1
1 1 -1
2
3
ANS:2
2 4
3 1
6
2 0 -1
7
3 0 -1
0
0 0 -1
1 0 0
CREATE PAIR:0 1
2 0 -1
3 0 2
CREATE PAIR:2 3
1
2
3
ANS:2
1 2
3 4
0
0 0 -1
1
1 0 -1
2
2 0 -1
3
3 0 -1
ANS:0
1 2
3 4

result:

wrong answer Integer parameter [name=k] equals to 5, violates the range [0, 2] (test case 1)