Submission #261767

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
261767	2020-08-12 04:38:37	shenxy	Colors (RMI18_colors)	C++11	38 / 100	609 ms	85144 KiB

colors

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#include <cstdio>
#include <algorithm>
#include <vector>
using namespace std;
typedef pair<int, int> ii;
int N;
vector<int> queries[150000];
bool sad = 0;
struct UFDS {
  vector<int> parent, sz;
  vector<ii> ops;
  UFDS(int N) {
    for (int i = 0; i < N; ++i) parent.push_back(i), sz.push_back(1);
  }
  int find_parent(int i) {
    if (parent[i] == i) return i;
    return find_parent(parent[i]);
  }
  void union_set(int p, int q) {
    p = find_parent(p), q = find_parent(q);
    if (p == q) {
      ops.push_back(ii(-1, -1));
      return;
    }
    if (sz[p] < sz[q]) swap(p, q);
    parent[q] = p, sz[p] += sz[q];
    ops.push_back(ii(p, q));
  }
  void rollback() {
    if (ops.back() == ii(-1, -1)) return;
 
 
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Compilation message (stderr)

colors.cpp: In member function 'void seg::query()':
colors.cpp:63:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int i = 0; i < v.size(); ++i) sets -> rollback();
                   ~~^~~~~~~~~~
colors.cpp: In function 'int main()':
colors.cpp:68:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &T);
  ~~~~~^~~~~~~~~~
colors.cpp:72:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d", &N, &M);
   ~~~~~^~~~~~~~~~~~~~~~~
colors.cpp:75:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   for (int i = 0; i < N; ++i) scanf("%d", &A[i]);
                               ~~~~~^~~~~~~~~~~~~
colors.cpp:76:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   for (int i = 0; i < N; ++i) scanf("%d", &B[i]);
                               ~~~~~^~~~~~~~~~~~~
colors.cpp:86:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d %d", &u, &v);
    ~~~~~^~~~~~~~~~~~~~~~~

• Subtask 1: 15 / 15
• Subtask 2: 7 / 7
• Subtask 3: 0 / 8
• Subtask 4: 0 / 15
• Subtask 5: 0 / 7
• Subtask 6: 16 / 16
• Subtask 7: 0 / 10
• Subtask 8: 0 / 22