Submission #357870

#TimeUTC-0UsernameProblemLanguageResultExecution timeMemory
3578702021-01-24 21:07:01shivensinha4Bridges (APIO19_bridges)C++17
73 / 100
3066 ms8480 KiB
/*
* Divide queries into blocks of sqrt(m).
* For each block, at max sqrt(m) edges will be changed.
* For the edges which do not change, maintain a set of nodes
*/
#include "bits/stdc++.h"
using namespace std;
#define for_(i, s, e) for (int i = s; i < (int) e; i++)
#define for__(i, s, e) for (ll i = s; i < e; i++)
typedef long long ll;
typedef vector<int> vi;
typedef pair<int, int> ii;
#define endl '\n'
class UFDS {
public:
vi p, rank, sz; int count = 0;
void build(int n) {
p.assign(n, 0); rank.assign(n, 0); sz.assign(n, 1);
for_(i, 0, n) p[i] = i;
count = n;
}
int getParent(int i) {
return (p[i] == i) ? i : (p[i] = getParent(p[i]));
}
void join(int i, int j) {
int a = getParent(i), b = getParent(j);
if (a == b) return;
count -= 1;
 
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Compilation message (stderr)

bridges.cpp: In function 'int main()':
bridges.cpp:100:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::array<int, 2> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  100 |     while (pt < same.size() and same[pt][0] >= qr[qq][1]) {
      |            ~~~^~~~~~~~~~~~~
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