Submission #422129

#	Time	Username	Problem	Language	Result	Execution time	Memory
422129		daanolav	Game (IOI14_game)	C++14	Compilation error	0 ms	0 KiB

game

#include <cstdio>
#include <cassert>
#include <vector>
#include "game.h"

using namespace std;

#define MAXN 1000001

typedef vector<int> vi;

int n;

int read_int() {
    int x;
    assert(scanf("%d", &x) == 1);
    return x;
}

int ufParent[MAXN];
int ufSize[MAXN];
int ufLinkingPossibilities[MAXN];
vi ufPossibleConnections[MAXN];

int ufFind(int a) {
    if(ufParent[a] == a) {
        return a;
    }
    ufParent[a] = ufFind(ufParent[a]);
    return ufParent[a];
}

void ufUnite(int a, int b) {
    a = ufFind(a);
    b = ufFind(b);
    if(ufSize[a] > ufSize[b]) {
        swap(a,b);
    }


    ufParent[b] = a;
    ufSize[a] += ufSize[b];
    for(int i = 0; i < n; ++i) {
        if(i == a || i == b) {
            //ufLinkingPossibilities[a] -= ufPossibleConnections[a][i];
            ufPossibleConnections[a][i] = 0;
        } else {
            ufPossibleConnections[a][i] += ufPossibleConnections[b][i];
            //ufLinkingPossibilities[a] += ufPossibleConnections[b][i];

            ufPossibleConnections[i][a] += ufPossibleConnections[i][b];
            ufPossibleConnections[i][b] = 0;
        }
    }

}

void initialize(int n) {

    for(int i = 0; i < n; ++i) {
        ufParent[i] = i;
        ufSize[i] = 1;
        ufLinkingPossibilities[i] = 0;
        for(int j = 0; j < n; ++j) {
            if(i == j) {
                ufPossibleConnections[i].push_back(0);
                continue;
            }
            ufPossibleConnections[i].push_back(1);
            ufLinkingPossibilities[i] += 1;

        }
    }

}

int hasEdge(int u,int v) {
    if(ufPossibleConnections[ufFind(u)][ufFind(v)] > 1) {
        return 0;
    } else {
        ufUnite(u,v);
        return 1;
    }
}

int main() {
    int u, v, r;
    n = read_int();
    initialize(n);
    r = n * (n - 1) / 2;
    for (int i = 0; i < r; i++) {
        u = read_int();
        v = read_int();
        printf("%d\n", hasEdge(u, v));
    }
    return 0;
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccCTlWyF.o: in function `read_int()':
grader.cpp:(.text+0x0): multiple definition of `read_int()'; /tmp/ccsgTEKF.o:game.cpp:(.text+0x50): first defined here
/usr/bin/ld: /tmp/ccCTlWyF.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccsgTEKF.o:game.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status