Submission #645277

#	Time	Username	Problem	Language	Result	Execution time	Memory
645277		Vladth11	The Potion of Great Power (CEOI20_potion)	C++14	56 / 100	3068 ms	74696 KiB

potion

#include <iostream>
#include <vector>
#include <set>
#include <unordered_set>
#include <algorithm>
 
//#define debug(x) cerr << #x << " " << x << "\n"
 
#pragma GCC optimize("Ofast")
 
using namespace std;
typedef long long ll;
typedef pair <int, int> pii;
 
const int bSize = 11;
const int bits = 17;
const int NMAX = 100000;
const int VMAX = NMAX * 89;
 
int a[NMAX], n;
int u;
int f[NMAX];
int changer = 0;
int par[NMAX];
 
int total = 0;
int nxt[NMAX * 1001];
int val[NMAX * 1001];
 
class lista{
public:
    int cnt = 0;
    int primul = 0;
    int ultimul = 0;
    void init(){
        cnt = primul = ultimul = 0;
    }
    void clear(){
        cnt = 0;
        primul = 0;
        ultimul = 0;
    }
    void push_back(int x){
        if(cnt == 0){
            primul = ultimul = ++total;
        }else{
            nxt[ultimul] = ++total;
            ultimul = total;
        }
        cnt++;
        val[total] = x;
    }
};
 
struct BLOCK {
    int time;
    lista v;
};
 
vector <BLOCK> blocks[NMAX];
vector <pii> changes[NMAX];
vector <int> vecini[NMAX];
void baga(int pt, int x, int cand) {
    vecini[pt].push_back(x);
    changes[pt].push_back({x, cand});
    if(changes[pt].size() % bSize == 0) {
        BLOCK nou;
      	nou.v.init();
        changer++;
        nou.v.clear();
        nou.time = cand;
        for(auto x : vecini[pt]) {
            par[x] = 0;
        }
        for(auto x : vecini[pt]) {
            par[x]++;
        }
        for(auto x : vecini[pt]) {
            if(par[x] % 2 == 1 && f[x] != changer) {
                nou.v.push_back(x);
                f[x] = changer;
            }
        }
        vecini[pt].clear(); // asta e confirmed?
        int t = nou.v.primul;
        while(t != 0){
            vecini[pt].push_back(val[t]);
            t = nxt[t];
        }
        blocks[pt].push_back(nou);
    }
}
 
void init(int N, int D, int H[]) {
    n = N;
    for(int i = 0; i < N; i++) {
        a[i] = H[i];
    }
}
 
void curseChanges(int U, int A[], int B[]) {
    u = U;
    for(int i = 0; i < U; i++) {
        int timp = i + 1;
        baga(A[i], B[i], timp);
        baga(B[i], A[i], timp);
    }
}
 
bool cmp(int A, int B) {
    if(a[A] != a[B])
        return a[A] < a[B];
    return A < B;
}
 
int impX[NMAX];
int impY[NMAX];
int intrebare;
vector <int> parcurgere[2];
 
int question(int x, int y, int v) {
    int r = -1;
    parcurgere[0].clear();
    parcurgere[1].clear();
    intrebare++;
    int timpX = 0, timpY = 0;
    int pas = (1 << 13), r1 = -1;
    while(pas) {
        if(r + pas < blocks[x].size() &&blocks[x][r + pas].time <= v)
            r += pas;
        if(r1 + pas < blocks[y].size() && blocks[y][r1 + pas].time <= v)
            r1 += pas;
        pas /= 2;
    }
    if(r != -1) {
        timpX =blocks[x][r].time + 1;
        int t = blocks[x][r].v.primul;
        while(t != 0){
            parcurgere[0].push_back(val[t]);
            t = nxt[t];
        }
    }
    if(r1 != -1) {
        timpY = blocks[y][r1].time + 1;
        int t = blocks[y][r1].v.primul;
        while(t != 0){
            parcurgere[1].push_back(val[t]);
            t = nxt[t];
        }
    }
    r = -1, pas = (1 << bits), r1 = -1;
    while(pas) {
        if(r + pas < changes[x].size() && changes[x][r + pas].second < timpX)
            r += pas;
        if(r1 + pas < changes[y].size() && changes[y][r1 + pas].second < timpY)
            r1 += pas;
        pas /= 2;
    }
    r++;
    for(; r < changes[x].size() && changes[x][r].second <= v; r++) {
        pii change = changes[x][r];
        parcurgere[0].push_back(change.first);
    }
    r1++;
    for(; r1 < changes[y].size() && changes[y][r1].second <= v; r1++) {
        pii change = changes[y][r1];
        parcurgere[1].push_back(change.first);
    }
    if(!parcurgere[0].size() || !parcurgere[1].size()) return 1e9;
    sort(parcurgere[0].begin(), parcurgere[0].end(), cmp);
    sort(parcurgere[1].begin(), parcurgere[1].end(), cmp);
    for(auto x : parcurgere[0]) {
        impX[x] = 0;
    }
    for(auto x : parcurgere[0]) {
        impX[x]++;
    }
    for(auto x : parcurgere[1]) {
        impY[x] = 0;
    }
    for(auto x : parcurgere[1]) {
        impY[x]++;
    }
    int minim = 1e9;
    int j = 0, i = 0;
    while(i < parcurgere[0].size() && j < parcurgere[1].size()) {
        if(impX[parcurgere[0][i]] % 2 == 0) {
            i++;
            continue;
        }
        if(impY[parcurgere[1][j]] % 2 == 0) {
            j++;
            continue;
        }
        minim = min(minim, abs(a[parcurgere[0][i]] - a[parcurgere[1][j]]));
        if(a[parcurgere[0][i]] < a[parcurgere[1][j]])
            i++;
        else
            j++;
    }
    return minim;
}

Compilation message (stderr)

potion.cpp: In function 'int question(int, int, int)':
potion.cpp:129:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<BLOCK>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  129 |         if(r + pas < blocks[x].size() &&blocks[x][r + pas].time <= v)
      |            ~~~~~~~~^~~~~~~~~~~~~~~~~~
potion.cpp:131:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<BLOCK>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  131 |         if(r1 + pas < blocks[y].size() && blocks[y][r1 + pas].time <= v)
      |            ~~~~~~~~~^~~~~~~~~~~~~~~~~~
potion.cpp:153:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  153 |         if(r + pas < changes[x].size() && changes[x][r + pas].second < timpX)
      |            ~~~~~~~~^~~~~~~~~~~~~~~~~~~
potion.cpp:155:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  155 |         if(r1 + pas < changes[y].size() && changes[y][r1 + pas].second < timpY)
      |            ~~~~~~~~~^~~~~~~~~~~~~~~~~~~
potion.cpp:160:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  160 |     for(; r < changes[x].size() && changes[x][r].second <= v; r++) {
      |           ~~^~~~~~~~~~~~~~~~~~~
potion.cpp:165:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  165 |     for(; r1 < changes[y].size() && changes[y][r1].second <= v; r1++) {
      |           ~~~^~~~~~~~~~~~~~~~~~~
potion.cpp:186:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  186 |     while(i < parcurgere[0].size() && j < parcurgere[1].size()) {
      |           ~~^~~~~~~~~~~~~~~~~~~~~~
potion.cpp:186:41: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  186 |     while(i < parcurgere[0].size() && j < parcurgere[1].size()) {
      |                                       ~~^~~~~~~~~~~~~~~~~~~~~~

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