Submission #588986

#	Time	Username	Problem	Language	Result	Execution time	Memory
588986		Arnch	The Potion of Great Power (CEOI20_potion)	C++17	0 / 100	132 ms	58796 KiB

potion

#include<bits/stdc++.h>
using namespace std;

const int N = 1e3 + 10, maxn = 1e6 + 10;

int n, d, h[maxn], a[maxn], b[maxn];
bool mark[maxn];
vector<int> pos[maxn], val[maxn];

void init(int N, int D, int H[]) {
	n = N, d = D;
	for(int i = 0; i < n; i++) h[i] = H[i];
}

void curseChanges(int U, int A[], int B[]) {
	for(int i = 0; i < U; i++) {
		a[i] = A[i], b[i] = B[i];
		pos[a[i]].push_back(b[i]), pos[b[i]].push_back(a[i]);
	}

	for(int i = 0; i < n; i++) {
		sort(pos[i].begin(), pos[i].end());
		int cnt = 0;
		for(int j = 0; j < pos[i].size(); j++) {
			cnt++;
			if(j == pos[i].size() - 1 || pos[i][j] != pos[i][j + 1]) {
				if(cnt % 2 == 1) val[i].push_back(pos[i][j]);
				cnt = 0;
				continue;
			}
		}
	}
}

int question(int x, int y, int v) {
	int ans = 1e9;
	for(auto i : val[x]) {
		int pos = lower_bound(val[y].begin(), val[y].end(), i) - val[y].begin();
		if(pos != val[y].size()) ans = min(ans, val[y][pos] - i);
	}
	for(auto i : val[y]) {
		int pos = lower_bound(val[x].begin(), val[x].end(), i) - val[x].begin();
		if(pos != val[x].size()) ans = min(ans, val[x][pos] - i);
	}

	return ans;
}

Compilation message (stderr)

potion.cpp: In function 'void curseChanges(int, int*, int*)':
potion.cpp:24:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |   for(int j = 0; j < pos[i].size(); j++) {
      |                  ~~^~~~~~~~~~~~~~~
potion.cpp:26:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |    if(j == pos[i].size() - 1 || pos[i][j] != pos[i][j + 1]) {
      |       ~~^~~~~~~~~~~~~~~~~~~~
potion.cpp: In function 'int question(int, int, int)':
potion.cpp:39:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |   if(pos != val[y].size()) ans = min(ans, val[y][pos] - i);
      |      ~~~~^~~~~~~~~~~~~~~~
potion.cpp:43:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |   if(pos != val[x].size()) ans = min(ans, val[x][pos] - i);
      |      ~~~~^~~~~~~~~~~~~~~~

• Subtask 1: 0 / 0
• Subtask 2: 0 / 17
• Subtask 3: 0 / 14
• Subtask 4: 0 / 18
• Subtask 5: 0 / 21
• Subtask 6: 0 / 30