Submission #1102466

#	Time	Username	Problem	Language	Result	Execution time	Memory
1102466		yavuzskarahan	Kutije (COCI21_kutije)	C++11	70 / 70	135 ms	1864 KiB

Main

#include <iostream>
#include <algorithm>

using namespace std;
 
const int N = 1000 + 5;
 
int n, m, q, a, b, arr[N];
 
struct DSU{

    int par[N], stsize[N];
 
    DSU(){
        for(int i = 1; i < N; i++) par[i] = i, stsize[i] = 1;
    }
 
    int setfind(int a){
        if(par[a] == a) return a;
        else return par[a] = setfind(par[a]);
    }
 
    void setunion(int a, int b){
        a = setfind(a), b = setfind(b);
 
        if(a != b){
            if(stsize[b] > stsize[a]) swap(a, b);
 
            par[b] = par[a];
            stsize[a] += stsize[b];
        }
    }
};
 
DSU dsu;
 
int main(){

    ios_base::sync_with_stdio(false); cin.tie(NULL);
 
    scanf("%d", &n);
    scanf("%d", &m);
    scanf("%d", &q);
 
    for(int i = 1; i <= m; i++){
        for(int i = 1; i <= n; i++) scanf("%d", &arr[i]);
        for(int i = 1; i <= n; i++) dsu.setunion(i, arr[i]);
    }
 
    while(q--){
        scanf("%d", &a);
        scanf("%d", &b);
        if(dsu.setfind(a) == dsu.setfind(b)) printf("DA\n");
        else printf("NE\n");
    }

}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:41:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   41 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
Main.cpp:42:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   42 |     scanf("%d", &m);
      |     ~~~~~^~~~~~~~~~
Main.cpp:43:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   43 |     scanf("%d", &q);
      |     ~~~~~^~~~~~~~~~
Main.cpp:46:42: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   46 |         for(int i = 1; i <= n; i++) scanf("%d", &arr[i]);
      |                                     ~~~~~^~~~~~~~~~~~~~~
Main.cpp:51:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   51 |         scanf("%d", &a);
      |         ~~~~~^~~~~~~~~~
Main.cpp:52:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   52 |         scanf("%d", &b);
      |         ~~~~~^~~~~~~~~~

• Subtask 1: 15 / 15
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 35 / 35