제출 #422130

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
422130		daanolav	게임 (IOI14_game)	C++14	컴파일 에러	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;
}

컴파일 시 표준 에러 (stderr) 메시지

game.cpp: In function 'int main()':
game.cpp:90:9: error: 'read_int' was not declared in this scope
   90 |     n = read_int();
      |         ^~~~~~~~