Submission #758742

#	Time	Username	Problem	Language	Result	Execution time	Memory
758742		gagik_2007	The Potion of Great Power (CEOI20_potion)	C++17	38 / 100	3031 ms	262144 KiB

potion

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

typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

#define ff first
#define ss second

ll ttt;
const ll INF = 1e18;
const ll MOD = 1e9 + 7;
const ll MAXN = 1e5 + 7;
int n;
int a[MAXN];
vector<pair<int, int>>q[MAXN];
vector<int>vi[MAXN];
vector<set<int>>v[MAXN];
set<int>curv[MAXN];
int T;

void init(int N, int D, int H[]) {
    n = N;
    set<int>empty;
    empty.clear();
    for (int i = 0; i < n; i++) {
        a[i] = H[i];
        v[i].push_back(empty);
        vi[i].push_back(-1);
    }
    T = 15;
}

void curseChanges(int U, int A[], int B[]) {
    for(int i=0;i<U;i++){
        if(curv[A[i]].find(B[i])!=curv[A[i]].end()){
            // A[i]
            q[A[i]].push_back({i, -(B[i]+1)});
            curv[A[i]].erase(B[i]);

            // B[i]
            q[B[i]].push_back({i, -(A[i]+1)});
            curv[B[i]].erase(A[i]);
        }
        else{
            // A[i]
            q[A[i]].push_back({i, (B[i]+1)});
            curv[A[i]].insert(B[i]);

            // B[i]
            q[B[i]].push_back({i, (A[i]+1)});
            curv[B[i]].insert(A[i]);
        }

        if(q[A[i]].size()%T==0){
            v[A[i]].push_back(curv[A[i]]);
            vi[A[i]].push_back(i);
        }

        if(q[B[i]].size()%T==0){
            v[B[i]].push_back(curv[B[i]]);
            vi[B[i]].push_back(i);
        }
    }
}

set<int>cx,cy;
vector<int>vx,vy;

int question(int x, int y, int u) {
    cx.clear(), cy.clear(), vx.clear(), vy.clear();

    // x
    auto it=lower_bound(vi[x].begin(),vi[x].end(),u);
    it--;
    int ind=it-vi[x].begin();
    int day=*it;
    cx=v[x][ind];
    auto it2=upper_bound(q[x].begin(),q[x].end(),make_pair(day, int(1e9)));
    while(it2!=q[x].end()&&(*it2).ff<u){
        if((*it2).ss>0){
            cx.insert((*it2).ss-1);
        }
        else{
            cx.erase(-(*it2).ss-1);
        }
        it2++;
    }
    for(int i:cx){
        vx.push_back(a[i]);
    }
    
    // y
    it=lower_bound(vi[y].begin(),vi[y].end(),u);
    it--;
    ind=it-vi[y].begin();
    day=*it;
    cy=v[y][ind];
    it2=upper_bound(q[y].begin(),q[y].end(),make_pair(day, int(1e9)));
    while(it2!=q[y].end()&&(*it2).ff<u){
        if((*it2).ss>0){
            cy.insert((*it2).ss-1);
        }
        else{
            cy.erase(-(*it2).ss-1);
        }
        it2++;
    }
    for(int i:cy){
        vy.push_back(a[i]);
    }

    // finding the closest
    sort(vx.begin(),vx.end());
    sort(vy.begin(),vy.end());
    int ix=0,iy=0;
    int ans=1e9;
    while(ix<vx.size()&&iy<vy.size()){
        ans=min(ans,abs(vx[ix]-vy[iy]));
        if(vx[ix]<=vy[iy])ix++;
        else iy++;
    }
    return ans;
}

// int main() {
//     int N, D, U, Q;
//     std::ios::sync_with_stdio(false); std::cin.tie(NULL);
//     std::cin >> N >> D >> U >> Q;

//     int *F = new int[N];
//     for (int i=0; i<N; i++)
//         std::cin >> F[i];
//     init(N, D, F);

//     int *A = new int[U], *B = new int[U];
//     for (int i=0; i<U; i++) {
//         std::cin >> A[i] >> B[i];
//     }
//     curseChanges(U, A, B);

//     bool correct = true;
//     for (int i=0; i<Q; i++) {
//         int X,Y,V,CorrectAnswer;
//         std::cin >> X >> Y >> V >> CorrectAnswer;
//         int YourAnswer = question(X,Y,V);
//         if (YourAnswer != CorrectAnswer) {
//             std::cout << "WA! Question: " << i
//                 << " (X=" << X << ", Y=" << Y << ", V=" << V << ") "
//                     <<  "Your answer: " << YourAnswer
//                         << " Correct Answer: " << CorrectAnswer << std::endl;
//             correct = false;
//         } else {
//             std::cerr << YourAnswer << " - OK" << std::endl;
//         }
//     }

//     if (correct) {
//         std::cout << "Correct." << std::endl;
//     } else std::cout << "Incorrect." << std::endl;
//     return 0;
// }

Compilation message (stderr)

potion.cpp: In function 'int question(int, int, int)':
potion.cpp:120:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  120 |     while(ix<vx.size()&&iy<vy.size()){
      |           ~~^~~~~~~~~~
potion.cpp:120:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  120 |     while(ix<vx.size()&&iy<vy.size()){
      |                         ~~^~~~~~~~~~

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