Submission #669310

#	Time	Username	Problem	Language	Result	Execution time	Memory
669310		berr	The Potion of Great Power (CEOI20_potion)	C++17	0 / 100	746 ms	262144 KiB

potion

#include <bits/stdc++.h>
using namespace std;
const int N = 1e5+30;
vector<string> sts[N];
vector<array<int, 2>> adj[N];
vector<int> h, st[N];
map<array<int, 2>, int> mp;
string s;



void init(int n, int d, int H[]){

    for(int i=0; i<d; i++){
        s+='0';
    }

    for(int i=0; i<n; i++){
        sts[i].push_back(s);
        st[i].push_back(-1);
    }

    for(int i=0; i<n; i++){
        h.push_back(H[i]);

    }

}

void curseChanges(int u, int a[], int b[]){
    for(int i=0; i<u; i++){
        adj[a[i]].push_back({h[b[i]], b[i]});
        adj[b[i]].push_back({h[a[i]], a[i]});
    }

    for(int i=0; i<N; i++){
        sort(adj[i].begin(), adj[i].end());
    }


    for(int i=0; i<N; i++){
        for(int l=0; l<adj[i].size(); l++){
            mp[{i, adj[i][l][1]}]=l;
        }
    }

    for(int i=0; i<u; i++){
        int x=a[i], y=b[i];

        string ss=sts[x].back();
        
        int pos=mp[{x, y}];
        if(ss[pos]=='1') ss[pos]='0';
        else ss[pos]='1'; 

        sts[x].push_back(ss);
        st[x].push_back(i);

        swap(x, y);

        ss=sts[x].back();
        pos=mp[{x, y}];

        if(ss[pos]=='1') ss[pos]='0';
        else ss[pos]='1'; 

        sts[x].push_back(ss);
        st[x].push_back(i);

        swap(x, y);
    }
}


int question(int x, int y, int v){

    int posx = lower_bound(st[x].begin(), st[x].end(), v)-st[x].begin()-1;
    int posy = lower_bound(st[y].begin(), st[y].end(), v)-st[y].begin()-1;

    if(posx >= st[x].size() || posy <=0|| st[x][posx] >= v) return 1e9;
    if(posy >= st[y].size() || posy <=0 || st[y][posy] >= v) return 1e9;

    string sx = sts[x][posx], sy=sts[y][posy];
    int lx=0, ly=0;
    while(sx[lx]=='0') lx++;
    while(sy[ly]=='0') ly++;

    int ans=1e9;

    while(lx<sx.size() && ly < sy.size()){
        int vx=h[adj[x][lx][1]];
        int vy=h[adj[y][ly][1]];

        ans=min(ans, abs(vx-vy));

        if(vx < vy){
            lx ++;
            while(lx<sx.size() && sx[lx]=='0') lx++;
        }
        else if(vx > vy){
            ly ++;
            while(ly<sy.size() && sy[ly]=='0') ly++;
        }
        else{
            break;
        }
    }

    return ans;

}

Compilation message (stderr)

potion.cpp: In function 'void curseChanges(int, int*, int*)':
potion.cpp:42:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::array<int, 2> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |         for(int l=0; l<adj[i].size(); l++){
      |                      ~^~~~~~~~~~~~~~
potion.cpp: In function 'int question(int, int, int)':
potion.cpp:80:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   80 |     if(posx >= st[x].size() || posy <=0|| st[x][posx] >= v) return 1e9;
      |        ~~~~~^~~~~~~~~~~~~~~
potion.cpp:81:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   81 |     if(posy >= st[y].size() || posy <=0 || st[y][posy] >= v) return 1e9;
      |        ~~~~~^~~~~~~~~~~~~~~
potion.cpp:90:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   90 |     while(lx<sx.size() && ly < sy.size()){
      |           ~~^~~~~~~~~~
potion.cpp:90:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   90 |     while(lx<sx.size() && ly < sy.size()){
      |                           ~~~^~~~~~~~~~~
potion.cpp:98:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   98 |             while(lx<sx.size() && sx[lx]=='0') lx++;
      |                   ~~^~~~~~~~~~
potion.cpp:102:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  102 |             while(ly<sy.size() && sy[ly]=='0') ly++;
      |                   ~~^~~~~~~~~~

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