oj.uz

Submission #548348

# Submission time Handle Problem Language Result Execution time Memory
548348 2022-04-13T05:11:47 Z Amylopectin Pipes (BOI13_pipes) C++14
100 / 100
 262 ms 42696 KB 
#include <iostream>
#include <stdio.h>
#include <vector>
#include <queue>

using namespace std;
const int mxn = 6e5 + 10;
struct we
{
    long long to,num;
};
queue<long long> qu;
vector<struct we> pa[mxn] = {};
long long patva[mxn] = {},nva[mxn] = {},ind[mxn] = {},u[mxn] = {},upa[mxn] = {},sta = 0,li[mxn] = {},pnu[mxn] = {};
long long re(long long cn,long long cou)
{
    long long i,j,fn,cnu;
    u[cn] = 1;
    li[cou] = cn;
    for(i=0; i<pa[cn].size(); i++)
    {
        fn = pa[cn][i].to;
        cnu = pa[cn][i].num;
        if(cou > 1 && fn == li[0])
        {
            pnu[cou] = cnu;
        }
        if(u[fn] == 1)
            continue;
        pnu[cou] = cnu;
        re(fn,cou+1);
    }
    return 0;
}
int main()
{
//    freopen("pipes.g07-1.in","r",stdin);
//    freopen("ex 1.out","a",stdout);
    long long i,j,n,m,cn,cm,fn,fm,cou = 0,cnu,of,cyn,st,su,csu;
    scanf("%lld %lld",&n,&m);
    for(i=1; i<=n; i++)
    {
        scanf("%lld",&nva[i]);
    }
    for(j=0; j<m; j++)
    {
        scanf("%lld %lld",&cn,&cm);
        pa[cn].push_back({cm,j});
        pa[cm].push_back({cn,j});
        ind[cn] ++;
        ind[cm] ++;
    }
    if(m > n)
    {
        printf("0\n");
        return 0;
    }
    for(i=1; i<=n; i++)
    {
        if(ind[i] == 1)
        {
            qu.push(i);
            u[i] = 1;
            cou ++;
        }
    }
    if(m == n-1)
    {
        while(!qu.empty())
        {
            cn = qu.front();
            qu.pop();
//            of = 1;
            for(i=0; i<pa[cn].size(); i++)
            {
                fn = pa[cn][i].to;
                cnu = pa[cn][i].num;
                if(upa[cnu] == 1)
                    continue;
                upa[cnu] = 1;
//                of = 0;
                ind[fn] --;
                patva[cnu] = nva[cn];
                nva[fn] -= nva[cn];
                if(u[fn] == 1)
                {
                    if(nva[fn] != 0)
                    {
//                        printf("0\n");
//                        return 0;
                    }
                }
                if(ind[fn] == 1)
                {
                    u[fn] = 1;
                    qu.push(fn);
                    cou ++;
                }
            }
//            if(of == 1)
//            {
//                if()
//            }
        }
        for(i=0; i<m; i++)
        {
            printf("%lld\n",patva[i] * 2);
        }
    }
    else
    {
        while(!qu.empty())
        {
            cn = qu.front();
            qu.pop();
            for(i=0; i<pa[cn].size(); i++)
            {
                fn = pa[cn][i].to;
                cnu = pa[cn][i].num;
                if(upa[cnu] == 1)
                    continue;
                upa[cnu] = 1;
                ind[fn] --;
                patva[cnu] = nva[cn];
                nva[fn] -= nva[cn];
                if(ind[fn] == 1)
                {
                    u[fn] = 1;
                    qu.push(fn);
                    cou ++;
                }
            }
        }
        cyn = n-cou;
        if(cyn % 2 == 0)
        {
            printf("0\n");
            return 0;
        }
        su = 0;
        for(i=1; i<=n; i++)
        {
            if(u[i] == 0)
            {
                su += nva[i];
                st = i;
            }
        }
//        if(su % 2 == 1)
//        {
//            printf("0\n");
//            return 0;
//        }
        re(st,0);
        csu = 0;
        for(i=cyn-1; i>0; i-=2)
        {
            csu += nva[li[i]];
        }
        patva[pnu[0]] = su/2 - csu;
        for(i=1; i<cyn; i++)
        {
            patva[pnu[i]] = nva[li[i]] - patva[pnu[i-1]];
        }
//        if(patva[pnu[0]] + patva[pnu[cyn-1]] != nva[li[0]])
//        {
//            printf("0\n");
//            return 0;
//        }
        for(i=0; i<m; i++)
        {
            printf("%lld\n",patva[i] * 2);
        }
    }
    return 0;
}

Compilation message

pipes.cpp: In function 'long long int re(long long int, long long int)':
pipes.cpp:20:15: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<we>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |     for(i=0; i<pa[cn].size(); i++)
      |              ~^~~~~~~~~~~~~~
pipes.cpp:17:17: warning: unused variable 'j' [-Wunused-variable]
   17 |     long long i,j,fn,cnu;
      |                 ^
pipes.cpp: In function 'int main()':
pipes.cpp:74:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<we>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   74 |             for(i=0; i<pa[cn].size(); i++)
      |                      ~^~~~~~~~~~~~~~
pipes.cpp:116:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<we>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  116 |             for(i=0; i<pa[cn].size(); i++)
      |                      ~^~~~~~~~~~~~~~
pipes.cpp:39:32: warning: unused variable 'fm' [-Wunused-variable]
   39 |     long long i,j,n,m,cn,cm,fn,fm,cou = 0,cnu,of,cyn,st,su,csu;
      |                                ^~
pipes.cpp:39:47: warning: unused variable 'of' [-Wunused-variable]
   39 |     long long i,j,n,m,cn,cm,fn,fm,cou = 0,cnu,of,cyn,st,su,csu;
      |                                               ^~
pipes.cpp:40:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |     scanf("%lld %lld",&n,&m);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~
pipes.cpp:43:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   43 |         scanf("%lld",&nva[i]);
      |         ~~~~~^~~~~~~~~~~~~~~~
pipes.cpp:47:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   47 |         scanf("%lld %lld",&cn,&cm);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~
pipes.cpp:154:11: warning: 'st' may be used uninitialized in this function [-Wmaybe-uninitialized]
  154 |         re(st,0);
      |         ~~^~~~~~

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 14436 KB Output is correct
2 Correct 8 ms 14420 KB Output is correct
3 Correct 10 ms 14468 KB Output is correct
4 Correct 104 ms 24732 KB Output is correct
5 Correct 8 ms 14496 KB Output is correct
6 Correct 8 ms 14420 KB Output is correct
7 Correct 8 ms 14420 KB Output is correct
8 Correct 8 ms 14384 KB Output is correct
9 Correct 9 ms 14420 KB Output is correct
10 Correct 8 ms 14420 KB Output is correct
11 Correct 9 ms 14532 KB Output is correct
12 Correct 8 ms 14536 KB Output is correct
13 Correct 75 ms 22636 KB Output is correct
14 Correct 89 ms 24128 KB Output is correct
15 Correct 82 ms 24760 KB Output is correct
16 Correct 66 ms 23172 KB Output is correct
17 Correct 79 ms 24652 KB Output is correct
18 Correct 98 ms 24656 KB Output is correct
19 Correct 88 ms 24348 KB Output is correct
20 Correct 7 ms 14420 KB Output is correct
21 Correct 9 ms 14420 KB Output is correct
22 Correct 83 ms 24684 KB Output is correct
23 Correct 63 ms 22632 KB Output is correct
24 Correct 100 ms 24720 KB Output is correct
25 Correct 85 ms 23032 KB Output is correct

Subtask #2
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 14420 KB Output is correct
2 Correct 9 ms 14548 KB Output is correct
3 Correct 64 ms 23592 KB Output is correct
4 Correct 59 ms 21528 KB Output is correct
5 Correct 51 ms 21276 KB Output is correct
6 Correct 262 ms 42696 KB Output is correct
7 Correct 8 ms 14420 KB Output is correct
8 Correct 8 ms 14400 KB Output is correct
9 Correct 8 ms 14420 KB Output is correct
10 Correct 8 ms 14420 KB Output is correct
11 Correct 8 ms 14400 KB Output is correct
12 Correct 8 ms 14420 KB Output is correct
13 Correct 8 ms 14392 KB Output is correct
14 Correct 10 ms 14396 KB Output is correct
15 Correct 9 ms 14548 KB Output is correct
16 Correct 9 ms 14548 KB Output is correct
17 Correct 9 ms 14536 KB Output is correct
18 Correct 8 ms 14404 KB Output is correct
19 Correct 8 ms 14420 KB Output is correct
20 Correct 8 ms 14420 KB Output is correct
21 Correct 8 ms 14540 KB Output is correct
22 Correct 8 ms 14540 KB Output is correct
23 Correct 71 ms 26704 KB Output is correct
24 Correct 102 ms 28584 KB Output is correct
25 Correct 82 ms 23564 KB Output is correct
26 Correct 55 ms 21528 KB Output is correct
27 Correct 52 ms 21452 KB Output is correct
28 Correct 68 ms 21772 KB Output is correct
29 Correct 207 ms 37404 KB Output is correct
30 Correct 83 ms 27652 KB Output is correct
31 Correct 86 ms 31256 KB Output is correct
32 Correct 93 ms 25816 KB Output is correct
33 Correct 75 ms 24116 KB Output is correct
34 Correct 55 ms 21524 KB Output is correct
35 Correct 54 ms 21476 KB Output is correct
36 Correct 55 ms 21580 KB Output is correct
37 Correct 251 ms 42612 KB Output is correct
38 Correct 85 ms 28168 KB Output is correct
39 Correct 82 ms 25420 KB Output is correct
40 Correct 94 ms 28440 KB Output is correct
41 Correct 67 ms 23992 KB Output is correct
42 Correct 56 ms 21580 KB Output is correct
43 Correct 60 ms 21492 KB Output is correct
44 Correct 59 ms 21316 KB Output is correct
45 Correct 183 ms 39752 KB Output is correct
46 Correct 85 ms 27400 KB Output is correct
47 Correct 87 ms 28544 KB Output is correct
48 Correct 98 ms 31024 KB Output is correct
49 Correct 71 ms 23716 KB Output is correct
50 Correct 60 ms 21708 KB Output is correct
51 Correct 59 ms 21572 KB Output is correct
52 Correct 64 ms 21504 KB Output is correct
53 Correct 195 ms 39124 KB Output is correct
54 Correct 89 ms 27212 KB Output is correct