제출 #302047

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
302047		radaiosm7	슈퍼트리 잇기 (IOI20_supertrees)	C++17	0 / 100	1 ms	512 KiB

supertrees

#include "supertrees.h"
#include <bits/stdc++.h>
using namespace std;
int par[1005];
int depth[1005];
vector<int> teams[1005];

int FindPre(int x) {
  if (par[x] == x) {
    return x;
  }  else {
    return par[x] = FindPre(par[x]);
  }
}

bool IsSame(int x, int y) {
  if (FindPre(x) == FindPre(y)) {
    return true;
  }

  else {
    return false;
  }
}

void Union(int x, int y) {
  int PX = FindPre(x);
  int PY = FindPre(y);

  if (depth[PX] > depth[PY]) {
    par[PY] = PX;
  }

  else if (depth[PX] < depth[PY]) {
    par[PX] = PY;
  }

  else {
    par[PY] = PX;
    depth[PX]++;
  }
}


int construct(vector<vector<int>> p) {
	int n = p.size();
	vector<vector<int>> ans(n, vector<int>(n, 0));

	for (int i=0; i < n-1; i++) {
    for (int j=i+1; j < n; j++) {
      if (p[i][j] == 1) {
        Union(i,j);
      }
    }
	}

  for (int i=0; i < n; i++) {
      teams[FindPre(i)].push_back(i);
  }

  for (int i=0; i < n-1; i++) {
    for (int j=i+1; j < n; j++) {
      if (p[i][j] == 0 && IsSame(i,j)) {
        return 0;
      }
    }
  }

  for (int i=0; i < n; i++) {
    for (int j=0; j < teams[i].size()-1; j++) {
      ans[teams[i][j+1]][teams[i][j]] = 1;
      ans[teams[i][j]][teams[i][j+1]] = 1;
    }

    if (teams[i].size() > 1) {
      ans[teams[i][0]][teams[i].size()-1] = 1;
      ans[teams[i].size()-1][0] = 1;
    }
  }

	build(ans);
	return 1;
}

컴파일 시 표준 에러 (stderr) 메시지

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:70:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   70 |     for (int j=0; j < teams[i].size()-1; j++) {
      |                   ~~^~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 11
• Subtask 2: 0 / 10
• Subtask 3: 0 / 19
• Subtask 4: 0 / 35
• Subtask 5: 0 / 21
• Subtask 6: 0 / 4