Submission #768959

#	Time	Username	Problem	Language	Result	Execution time	Memory
768959		boyliguanhan	The Potion of Great Power (CEOI20_potion)	C++17	38 / 100	1247 ms	262144 KiB

potion

#include<bits/stdc++.h>
void debug(){}
#define NN 100100
using namespace std;
int h[NN], n;
map<int, vector<int>> adj[NN];
void init(int N, int D, int H[]) {
    n = N;
    for(int i = 0; i < N; i++)
        h[i] = H[i];
}

void curseChanges(int U, int A[], int B[]) {
    for(int i = 0; i < n; i++) adj[i][0];
    for(int i = 1; i <= U; i++) {
        if(i==10) debug();
        int a = A[i-1], b = B[i-1];
        vector<int> x = (--adj[a].end())->second, y = (--adj[b].end())->second;
        if(find(x.begin(), x.end(), b)!=x.end()) {
            int i=0;
            while(x[i]!=b)i++;
            while(i<x.size()-1)x[i]=x[i+1], i++;
            x.pop_back(), i=0;
            while(y[i]!=a)i++;
            while(i<y.size()-1)y[i]=y[i+1], i++;
            y.pop_back();
        } else x.push_back(b),y.push_back(a);
        adj[a][i] = x, adj[b][i] = y;
    }
}
int calc(vector<int> a, vector<int> b){
    int ans = 1e9;
    for(int i = 0, j = 0; i < a.size()&&j < b.size();i++) {
        if(a[i]>b[j]) swap(a, b), swap(i, j);
        if(j) ans=min(ans,abs(a[i]-b[j-1]));
        ans = min(ans, abs(a[i] - b[j]));
    }
    return ans;
}
int question(int x, int y, int v) {
    vector<int> a = (--adj[x].upper_bound(v))->second, b = (--adj[y].upper_bound(v))->second;
    for(auto &i: a) i = h[i];
    for(auto &i: b) i = h[i];
    sort(a.begin(), a.end());
    sort(b.begin(), b.end());
    return calc(a,b);
}

Compilation message (stderr)

potion.cpp: In function 'void curseChanges(int, int*, int*)':
potion.cpp:22:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |             while(i<x.size()-1)x[i]=x[i+1], i++;
      |                   ~^~~~~~~~~~~
potion.cpp:25:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |             while(i<y.size()-1)y[i]=y[i+1], i++;
      |                   ~^~~~~~~~~~~
potion.cpp: In function 'int calc(std::vector<int>, std::vector<int>)':
potion.cpp:33:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |     for(int i = 0, j = 0; i < a.size()&&j < b.size();i++) {
      |                           ~~^~~~~~~~~~
potion.cpp:33:43: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |     for(int i = 0, j = 0; i < a.size()&&j < b.size();i++) {
      |                                         ~~^~~~~~~~~~

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