Submission #612038

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
612038	2022-07-29T10:21:30 Z	1bin	The Potion of Great Power (CEOI20_potion)	C++14	Compilation error	0 ms	0 KB

potion

#include <bits/stdc++.h>

using namespace std;

#define fi first
#define all(v) v.begin(), v.end()
const int NMAX = 1e5 + 5;
const int sqt = 50;
int n, d, u, q, h[NMAX], a, b;
vector<int> ix[NMAX], l, r;
vector<vector<pair<int, int>>> v[NMAX];

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

void chk(int x, int A[], int B[]){
    int sz = ix[x].size();
    if(sz % sqt) return;
    set<pair<int, int>> s;
    if(--sz) for(auto& t : v[x].back()) s.emplace(t);
    for(int i = sz * sqt; i < sz * sqt + sqt; i++){
        int y = (A[ix[x][i]] == x) ? B[ix[x][i]] : A[ix[x][i]];
        if(s.find({h[y], y}) == s.end()) s.insert({h[y], y});
        else s.erase({h[y], y});
    }
    vector<pair<int, int>> tmp;
    for(auto t : s) tmp.emplace_back(t);
    v[x].emplace_back(tmp);
    return;
}

void curseChanges(int U, int A[], int B[]){
    u = U;
    for(int i = 0; i < u; i++){
        a = A[i]; b = B[i];
        ix[a].emplace_back(i);
        ix[b].emplace_back(i);
        chk(a, A, B); chk(b, A, B);
    }
    return;
}

int question(int x, int y, int V){
    int ans = 1e9, xi, yi, xb, yb, hx, hy, iix, iiy;
    int xsz = lower_bound(all(ix[x]), V) - ix[x].begin();
    int ysz = lower_bound(all(ix[y]), V) - ix[y].begin();
    xb = xsz / sqt * sqt; yb = ysz / sqt * sqt;
    xi = yi = 0;
    while(xi < xb && yi < yb){
        hx = v[x][xi / sqt][xi].fi;
        hy = v[y][yi / sqt][yi].fi;
        ans = min(ans, abs(hx - hy));
        hx < hy ? xi++ : yi++;
    }
    xi = xb; yi = 0;
    while(xi < xsz && yi < yb){
        hx = v[x][xi / sqt][xi].fi;
        hy = v[y][yi / sqt][yi].fi;
        ans = min(ans, abs(hx - hy));
        hx < hy ? xi++ : yi++;
    }
    xi = 0; yi = yb;
    while(xi < xb && yi < ysz){
        hx = v[x][xi / sqt][xi].fi;
        hy = v[y][yi / sqt][yi].fi;
        ans = min(ans, abs(hx - hy));
        hx < hy ? xi++ : yi++;
    }
    xi = yb; yi = yb;
    while(xi < xsz && yi < ysz){
        hx = v[x][xi / sqt][xi].fi;
        hy = v[y][yi / sqt][yi].fi;
        ans = min(ans, abs(hx - hy));
        hx < hy ? xi++ : yi++;
    }
    return ans;
}

int main(void){
    ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    
    
    return 0;
}

Compilation message

potion.cpp: In function 'int question(int, int, int)':
potion.cpp:47:44: warning: unused variable 'iix' [-Wunused-variable]
   47 |     int ans = 1e9, xi, yi, xb, yb, hx, hy, iix, iiy;
      |                                            ^~~
potion.cpp:47:49: warning: unused variable 'iiy' [-Wunused-variable]
   47 |     int ans = 1e9, xi, yi, xb, yb, hx, hy, iix, iiy;
      |                                                 ^~~
/usr/bin/ld: /tmp/ccDhvX67.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccdRf8B7.o:potion.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status