# | Submission time | Handle | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
362820 | 2021-02-04T12:56:07 Z | mathking1021 | Connecting Supertrees (IOI20_supertrees) | C++17 | 1 ms | 512 KB |
#include "supertrees.h" #include <vector> using namespace std; int cp[1005]; int cp2[1005]; vector<int> ve[1005]; vector<int> ve2[1005]; vector<int> ve3; int fnd(int p) { if(cp[p] == p) return p; return cp[p] = fnd(cp[p]); } void uni(int p, int q) { if(fnd(p) == fnd(q)) return; cp[fnd(p)] = fnd(q); } int fnd2(int p) { if(cp2[p] == p) return p; return cp2[p] = fnd(cp2[p]); } void uni2(int p, int q) { if(fnd2(p) == fnd2(q)) return; cp2[fnd2(p)] = fnd2(q); } int construct(vector<vector<int> > p) { int n = p.size(); vector<vector<int> > answer; for(int i = 0; i < n; i++) { cp[i] = i; cp2[i] = i; } for(int i = 0; i < n; i++) { for(int j = 0; j < n; j++) { if(p[i][j]) uni(i, j); } } for(int i = 0; i < n; i++) { for(int j = 0; j < n; j++) { if(!p[i][j] && fnd(i) == fnd(j)) return 0; } } for(int i = 0; i < n; i++) { vector<int> row; for(int j = 0; j < n; j++) { row.push_back(0); } answer.push_back(row); } for(int i = 0; i < n; i++) { ve[fnd(i)].push_back(i); } for(int i = 0; i < n; i++) { if(ve[i].size() == 0) continue; if(ve[i].size() == 1) continue; for(int j = 0; j < ve[i].size(); j++) { for(int k = j + 1; k < ve[i].size(); k++) { if(p[ve[i][j]][ve[i][k]] == 1) uni2(ve[i][j], ve[i][k]); } } for(int j = 0; j < ve[i].size(); j++) { ve2[fnd2(ve[i][j])].push_back(ve[i][j]); } ve3.clear(); for(int j = 0; j < ve[i].size(); j++) { if(ve2[ve[i][j]].size() == 0) continue; for(int k = 1; k < ve2[ve[i][j]].size(); k++) { answer[ve2[ve[i][j]][k]][ve2[ve[i][j]][k - 1]] = 1; answer[ve2[ve[i][j]][k - 1]][ve2[ve[i][j]][k]] = 1; } ve3.push_back(ve[i][j]); } for(int j = 1; j < ve3.size(); j++) { answer[ve3[j]][ve3[j - 1]] = 1; answer[ve3[j - 1]][ve3[j]] = 1; } answer[ve3[0]][ve3[ve3.size() - 1]] = 1; answer[ve3[ve3.size() - 1]][ve3[0]] = 1; } build(answer); return 1; }
Compilation message
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Correct | 1 ms | 364 KB | Output is correct |
2 | Incorrect | 0 ms | 364 KB | b[1][1] is not 0 |
3 | Halted | 0 ms | 0 KB | - |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Correct | 1 ms | 364 KB | Output is correct |
2 | Incorrect | 0 ms | 364 KB | b[1][1] is not 0 |
3 | Halted | 0 ms | 0 KB | - |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Correct | 1 ms | 512 KB | Output is correct |
2 | Correct | 0 ms | 364 KB | Output is correct |
3 | Correct | 0 ms | 364 KB | Output is correct |
4 | Incorrect | 1 ms | 396 KB | Answer gives possible 1 while actual possible 0 |
5 | Halted | 0 ms | 0 KB | - |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Correct | 0 ms | 364 KB | Output is correct |
2 | Correct | 1 ms | 364 KB | Output is correct |
3 | Incorrect | 0 ms | 364 KB | b[4][4] is not 0 |
4 | Halted | 0 ms | 0 KB | - |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Correct | 1 ms | 364 KB | Output is correct |
2 | Incorrect | 0 ms | 364 KB | b[1][1] is not 0 |
3 | Halted | 0 ms | 0 KB | - |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Correct | 1 ms | 364 KB | Output is correct |
2 | Incorrect | 0 ms | 364 KB | b[1][1] is not 0 |
3 | Halted | 0 ms | 0 KB | - |