oj.uz

Submission #771501

# Submission time Handle Problem Language Result Execution time Memory
771501 2023-07-03T05:27:48 Z Amylopectin One-Way Streets (CEOI17_oneway) C++14
100 / 100
 69 ms 33728 KB 
#include <stdio.h>
#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
const int mxn = 1e6 + 10,mxi = 1e9 + 10;
struct we
{
    int to,idx,dir;
};
vector<struct we> pat[mxn] = {};
int par[mxn] = {},vall[mxn] = {},u[mxn] = {},dep[mxn] = {};
char ans[mxn] = {};
int fimi(int l,int r)
{
    if(l < r)
    {
        return l;
    }
    return r;
}
int re(int cn,int cidx,int cdir)
{
    int i,j,fn,fidx,fdir,ret = mxi,cva;
    u[cn] = 1;
    for(i=0; i<pat[cn].size(); i++)
    {
        fn = pat[cn][i].to;
        fidx = pat[cn][i].idx;
        fdir = pat[cn][i].dir;
        if(fidx == cidx)
        {
            continue;
        }
        if(u[fn] == 1)
        {
            ans[fidx] = 'B';
            ret = fimi(ret,dep[fn]);
            continue;
        }
        dep[fn] = dep[cn] + 1;
        cva = re(fn,fidx,fdir);
        ret = fimi(ret,cva);
        vall[cn] += vall[fn];
    }
    if(cidx == -1)
    {
        return 0;
    }
    if(ret < dep[cn] || vall[cn] == 0)
    {
        ans[cidx] = 'B';
    }
    else 
    {
        if(vall[cn] < 0)
        {
            if(cdir == 0)
            {
                ans[cidx] = 'L';
            }
            else 
            {
                ans[cidx] = 'R';
            }
        }
        else 
        {
            if(cdir == 0)
            {
                ans[cidx] = 'R';
            }
            else 
            {
                ans[cidx] = 'L';
            }
        }
    }
    return ret;
}
int main()
{
    int i,j,q,k,n,m,cn,cm,fn,fm,roo = 1;
    scanf("%d %d",&n,&m);
    for(i=0; i<m; i++)
    {
        scanf("%d %d",&cn,&cm);
        pat[cn].push_back({cm,i,1});
        pat[cm].push_back({cn,i,0});
    }
    scanf("%d",&q);
    for(i=0; i<q; i++)
    {
        scanf("%d %d",&cn,&cm);
        vall[cn] ++;
        vall[cm] --;
    }
    for(i=1; i<=n; i++)
    {
        if(u[i] == 0)
        {
            dep[i] = 0;
            re(i,-1,-1);
        }
    }
    printf("%s\n",ans);
    return 0;
}

Compilation message

oneway.cpp: In function 'int re(int, int, int)':
oneway.cpp:26:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<we>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |     for(i=0; i<pat[cn].size(); i++)
      |              ~^~~~~~~~~~~~~~~
oneway.cpp:24:11: warning: unused variable 'j' [-Wunused-variable]
   24 |     int i,j,fn,fidx,fdir,ret = mxi,cva;
      |           ^
oneway.cpp: In function 'int main()':
oneway.cpp:83:11: warning: unused variable 'j' [-Wunused-variable]
   83 |     int i,j,q,k,n,m,cn,cm,fn,fm,roo = 1;
      |           ^
oneway.cpp:83:15: warning: unused variable 'k' [-Wunused-variable]
   83 |     int i,j,q,k,n,m,cn,cm,fn,fm,roo = 1;
      |               ^
oneway.cpp:83:27: warning: unused variable 'fn' [-Wunused-variable]
   83 |     int i,j,q,k,n,m,cn,cm,fn,fm,roo = 1;
      |                           ^~
oneway.cpp:83:30: warning: unused variable 'fm' [-Wunused-variable]
   83 |     int i,j,q,k,n,m,cn,cm,fn,fm,roo = 1;
      |                              ^~
oneway.cpp:83:33: warning: unused variable 'roo' [-Wunused-variable]
   83 |     int i,j,q,k,n,m,cn,cm,fn,fm,roo = 1;
      |                                 ^~~
oneway.cpp:84:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   84 |     scanf("%d %d",&n,&m);
      |     ~~~~~^~~~~~~~~~~~~~~
oneway.cpp:87:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   87 |         scanf("%d %d",&cn,&cm);
      |         ~~~~~^~~~~~~~~~~~~~~~~
oneway.cpp:91:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   91 |     scanf("%d",&q);
      |     ~~~~~^~~~~~~~~
oneway.cpp:94:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   94 |         scanf("%d %d",&cn,&cm);
      |         ~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 23764 KB Output is correct
2 Correct 12 ms 23764 KB Output is correct
3 Correct 12 ms 23764 KB Output is correct
4 Correct 12 ms 23816 KB Output is correct
5 Correct 12 ms 23892 KB Output is correct
6 Correct 11 ms 23788 KB Output is correct
7 Correct 12 ms 23824 KB Output is correct
8 Correct 12 ms 23764 KB Output is correct
9 Correct 12 ms 23836 KB Output is correct
10 Correct 12 ms 23860 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 23764 KB Output is correct
2 Correct 12 ms 23764 KB Output is correct
3 Correct 12 ms 23764 KB Output is correct
4 Correct 12 ms 23816 KB Output is correct
5 Correct 12 ms 23892 KB Output is correct
6 Correct 11 ms 23788 KB Output is correct
7 Correct 12 ms 23824 KB Output is correct
8 Correct 12 ms 23764 KB Output is correct
9 Correct 12 ms 23836 KB Output is correct
10 Correct 12 ms 23860 KB Output is correct
11 Correct 41 ms 29272 KB Output is correct
12 Correct 42 ms 30056 KB Output is correct
13 Correct 48 ms 30880 KB Output is correct
14 Correct 48 ms 31348 KB Output is correct
15 Correct 58 ms 31308 KB Output is correct
16 Correct 69 ms 29376 KB Output is correct
17 Correct 50 ms 30736 KB Output is correct
18 Correct 47 ms 29372 KB Output is correct
19 Correct 48 ms 31884 KB Output is correct
20 Correct 44 ms 29396 KB Output is correct
21 Correct 49 ms 29192 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 23764 KB Output is correct
2 Correct 12 ms 23764 KB Output is correct
3 Correct 12 ms 23764 KB Output is correct
4 Correct 12 ms 23816 KB Output is correct
5 Correct 12 ms 23892 KB Output is correct
6 Correct 11 ms 23788 KB Output is correct
7 Correct 12 ms 23824 KB Output is correct
8 Correct 12 ms 23764 KB Output is correct
9 Correct 12 ms 23836 KB Output is correct
10 Correct 12 ms 23860 KB Output is correct
11 Correct 41 ms 29272 KB Output is correct
12 Correct 42 ms 30056 KB Output is correct
13 Correct 48 ms 30880 KB Output is correct
14 Correct 48 ms 31348 KB Output is correct
15 Correct 58 ms 31308 KB Output is correct
16 Correct 69 ms 29376 KB Output is correct
17 Correct 50 ms 30736 KB Output is correct
18 Correct 47 ms 29372 KB Output is correct
19 Correct 48 ms 31884 KB Output is correct
20 Correct 44 ms 29396 KB Output is correct
21 Correct 49 ms 29192 KB Output is correct
22 Correct 61 ms 30840 KB Output is correct
23 Correct 60 ms 29192 KB Output is correct
24 Correct 61 ms 29336 KB Output is correct
25 Correct 61 ms 33728 KB Output is correct
26 Correct 67 ms 30444 KB Output is correct
27 Correct 62 ms 29252 KB Output is correct
28 Correct 38 ms 27084 KB Output is correct
29 Correct 59 ms 29000 KB Output is correct
30 Correct 56 ms 29180 KB Output is correct
31 Correct 61 ms 29532 KB Output is correct
32 Correct 56 ms 31240 KB Output is correct