Submission #31534

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
31534	2017-08-29T07:38:09 Z	ngkan146	Senior Postmen (BOI14_postmen)	C++	0 / 100	24 ms	23876 KB

postmen

#include <bits/stdc++.h>
using namespace std;
struct edge{
    int v=0, id=0;
    edge(int v=0,int id=0):id(id),v(v){}
};
int ctrl[1000005];
vector <edge> G[1000005];
bool visited[1000005];
int n,m;
int euler[1000005], eulersize;
int q[1000005], qsize;
void dfs(){
    q[qsize++] = 1;
    while(qsize){
        int u = q[qsize-1];
        bool mjk = 0;

        for(;ctrl[u]<G[u].size();++ctrl[u]){
            int v = G[u][ctrl[u]].v;
            int id = G[u][ctrl[u]].id;
            if (visited[id]) continue;
            mjk = 1;
            visited[id] = 1;
            q[qsize]++;
            break;
        }

        if(mjk) continue;

        euler[eulersize++] = u;
        --qsize;
    }
}
int st[1000005], stsize;
bool used[1000005];
int main(){
    scanf("%d %d",&n,&m);
    for(int i=1;i<=m;++i){
        int x,y;
        scanf("%d %d",&x,&y);
        G[x].push_back(edge(y,i));
        G[y].push_back(edge(x,i));
    }

    dfs();

    for(int i=0;i<eulersize;++i){
        if (used[euler[i]]){
            while(st[stsize-1] != euler[i]){
                printf("%d ",st[stsize-1]);
                used[st[stsize-1]] = 0;
                --stsize;
            };
            printf("%d\n",euler[i]);
        }
        else{
            st[stsize++] = euler[i];
            used[euler[i]] = 1;
        }
    }
}

Compilation message

postmen.cpp: In constructor 'edge::edge(int, int)':
postmen.cpp:4:17: warning: 'edge::id' will be initialized after [-Wreorder]
     int v=0, id=0;
                 ^
postmen.cpp:4:11: warning:   'int edge::v' [-Wreorder]
     int v=0, id=0;
           ^
postmen.cpp:5:5: warning:   when initialized here [-Wreorder]
     edge(int v=0,int id=0):id(id),v(v){}
     ^~~~
postmen.cpp: In function 'void dfs()':
postmen.cpp:19:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(;ctrl[u]<G[u].size();++ctrl[u]){
              ~~~~~~~^~~~~~~~~~~~
postmen.cpp:20:17: warning: unused variable 'v' [-Wunused-variable]
             int v = G[u][ctrl[u]].v;
                 ^
postmen.cpp: In function 'int main()':
postmen.cpp:38:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d",&n,&m);
     ~~~~~^~~~~~~~~~~~~~~
postmen.cpp:41:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d",&x,&y);
         ~~~~~^~~~~~~~~~~~~~~

Subtask #1

0 / 38.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	24 ms	23784 KB	Some edges were not used
2	Halted	0 ms	0 KB	-

Subtask #2

0 / 17.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	17 ms	23808 KB	Some edges were not used
2	Halted	0 ms	0 KB	-

Subtask #3

0 / 45.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	24 ms	23876 KB	Some edges were not used
2	Halted	0 ms	0 KB	-