Submission #1043066

#	Time	Username	Problem	Language	Result	Execution time	Memory
1043066		beaconmc	The Potion of Great Power (CEOI20_potion)	C++14	21 / 100	2020 ms	76368 KiB

potion

#include <bits/stdc++.h>
 
typedef long long ll;
#define FOR(i,x,y) for(ll i=x; i<y; i++)
#define FORNEG(i,x,y) for(ll i=x; i>y; i--)
 
using namespace std;
 
 
vector<unordered_set<ll>> edges[201];
vector<ll> h;
vector<ll> a;
vector<ll> b;
 
void init(int N, int D, int H[]) {
    FOR(i,0,N) h.push_back(H[i]);
}
 
void curseChanges(int U, int A[], int B[]) {
    vector<unordered_set<ll>> tempedges(10001);
    FOR(i,0,U){
        
        a.push_back(A[i]);
        b.push_back(B[i]);
        if (tempedges[A[i]].count(B[i])) tempedges[A[i]].erase(B[i]);
        else tempedges[A[i]].insert(B[i]);
 
        if (tempedges[B[i]].count(A[i])) tempedges[B[i]].erase(A[i]);
        else tempedges[B[i]].insert(A[i]);
        if (i%200==0) edges[i/200] = tempedges;
        
    }
}
 
int mindiff(vector<ll>&a, vector<ll>&b){
    ll ans = 1000000000;
    vector<vector<ll>> A,B;
    for (auto&i : a) A.push_back({h[i], i});
    for (auto&i : b) B.push_back({h[i], i});
 
    sort(A.begin(), A.end());
    sort(B.begin(), B.end());
 
    ll l=0,r=0;
    while (l<A.size() && r<B.size()){
        ans = min(ans, abs(A[l][0] - B[r][0]));
        if (A[l][0] < B[r][0]) l++;
        else r++;
    }
    return ans;
}
 
int question(int x, int y, int v) {
    v--;
    set<ll> X;
    set<ll> Y;
    for (auto&i : edges[v/200][x]) X.insert(i);
    for (auto&i : edges[v/200][y]) Y.insert(i);
    FOR(i,(v/200)*200+1, v+1){
 
        if (a[i] == x){
            if (X.count(b[i])) X.erase(b[i]);
            else X.insert(b[i]);
        } 
        if (a[i] == y){
            if (Y.count(b[i])) Y.erase(b[i]);
            else Y.insert(b[i]);
        }
        if (b[i] == x){
            if (X.count(a[i])) X.erase(a[i]);
            else X.insert(a[i]);
        }
        if (b[i] == y){
            if (Y.count(a[i])) Y.erase(a[i]);
            else Y.insert(a[i]);
        }
    }
    
    
    vector<ll> XX,YY;
    for (auto&i : X) XX.push_back(i);
    for (auto&i : Y) YY.push_back(i);
 
 
    return mindiff(XX,YY);
}

Compilation message (stderr)

potion.cpp: In function 'int mindiff(std::vector<long long int>&, std::vector<long long int>&)':
potion.cpp:45:13: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<std::vector<long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |     while (l<A.size() && r<B.size()){
      |            ~^~~~~~~~~
potion.cpp:45:27: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<std::vector<long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |     while (l<A.size() && r<B.size()){
      |                          ~^~~~~~~~~

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