Submission #641736

#	Time	Username	Problem	Language	Result	Execution time	Memory
641736		Vladth11	The Potion of Great Power (CEOI20_potion)	C++14	0 / 100	3041 ms	26152 KiB

potion

#include <bits/stdc++.h>
#define debug(x) cerr << #x << " " << x << "\n"
#define debugs(x) cerr << #x << " " << x << " "

using namespace std;
typedef long long ll;
typedef pair <int, int> pii;

const int NMAX = 100001;
const int VMAX = 101;
const int INF = 2e9;
const int MOD = 1000000007;
const int BLOCK = 447;
const int base = 117;
const int nr_of_bits = 24;
const int inv2 = 500000004;

set <int> events[NMAX];
int a[NMAX];

void init(int N, int D, int H[]) {
    for(int i = 0; i < N; i++){
        a[i] = H[i];
    }
}

void baga(int a, int b){
    if(events[a].find(b) == events[a].end())
        events[a].insert(b);
    else
        events[a].erase(b);
}

void curseChanges(int U, int A[], int B[]) {
    for(int i = 0; i < U; i++){
        baga(A[i], B[i]);
        baga(B[i], A[i]);
    }
}

int question(int x, int y, int v) {
    set <int> stX = events[x], stY = events[y];
    int last, ultim = -1;
    int minim = 1e9;
    if(stX.size() == 0 || stY.size() == 0)
        return minim;
    set <int> nou;
    for(auto p : stX){
        nou.insert(a[p]);
    }
    for(auto p : stY){
        int val = a[p];
        auto it = nou.lower_bound(val);
        if(it != nou.end()){
            minim = min(minim, abs((*it) - val));
        }
        it = nou.upper_bound(val);
        if(it != nou.begin()){
            it = prev(it);
            minim = min(minim, abs((*it) - val));
        }
    }
    return minim;
}

Compilation message (stderr)

potion.cpp: In function 'int question(int, int, int)':
potion.cpp:43:9: warning: unused variable 'last' [-Wunused-variable]
   43 |     int last, ultim = -1;
      |         ^~~~
potion.cpp:43:15: warning: unused variable 'ultim' [-Wunused-variable]
   43 |     int last, ultim = -1;
      |               ^~~~~

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