oj.uz

Submission #242183

# Submission time Handle Problem Language Result Execution time Memory
242183 2020-06-27T05:09:44 Z b00n0rp Pipes (BOI13_pipes) C++17
74.0741 / 100
 170 ms 23144 KB 
// --------------------------------------------------<TEMPLATE>--------------------------------------------------
// --------------------<optimizations>--------------------
#pragma GCC optimize("Ofast,unroll-loops")
/* I don't understand these pragmas at all. 
   Earlier I added all the optimizations I could find but 
   upon my short amount of testing, these 2 are enough and adding more makes it slower. */
 
// -------------------</optimizations>--------------------
 
// ---------------<Headers and namespaces>----------------
#include <algorithm>
#include <bitset>
#include <cassert>
#include <chrono>
#include <cmath>
#include <complex>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <deque>
#include <functional>
#include <iomanip>
#include <iostream>
#include <iterator>
#include <limits>
#include <list>
#include <map>
#include <numeric>
#include <queue>
#include <random>
#include <ratio>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>
using namespace std;
 
/*
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/rope>
using namespace __gnu_pbds;
using namespace __gnu_cxx;
*/
 
// ---------------</Headers and namespaces>---------------
 
// -----------------<Defines and typedefs>----------------
// typedef tree<int,null_type,less<int>,rb_tree_tag, \
tree_order_statistics_node_update> indexed_set; // use less_equal for multiset
// order_of_key (val): returns the no. of values less than val
// find_by_order (k): returns the iterator to kth largest element.(0-based)
 
typedef long double LD;
typedef long long ll;
#define int ll
#define pb push_back
#define mp make_pair
#define REP(i,n) for (int i = 0; i < n; i++)
#define FOR(i,a,b) for (int i = a; i < b; i++)
#define REPD(i,n) for (int i = n-1; i >= 0; i--)
#define FORD(i,a,b) for (int i = a; i >= b; i--)
#define remax(a,b) a = max(a,b)
#define remin(a,b) a = min(a,b)
#define all(v) v.begin(),v.end()
typedef map<int,int> mii;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<int,int> pii;
typedef vector<pii> vpii;
#define F first
#define S second
#define PQ(type) priority_queue<type>
#define PQD(type) priority_queue<type,vector<type>,greater<type> >
#define ITR :: iterator it
#define WL(t) while(t --)
#define SZ(x) ((int)(x).size())
#define runtime() ((double)clock() / CLOCKS_PER_SEC)
#define TR(container,it) for(typeof(container.begin()) it=container.begin();it!=container.end();it++)
#define sqr(x) ((x)*(x))
#define inrange(i,a,b) ((i>=min(a,b)) && (i<=max(a,b)))
 
// -----<SCANF>-----
#define sfi(x) scanf("%d",&x);
#define sfi2(x,y) scanf("%d%d",&x,&y);
#define sfi3(x,y,z) scanf("%d%d%d",&x,&y,&z);
 
#define sfl(x) scanf("%lld",&x);
#define sfl2(x,y) scanf("%lld%lld",&x,&y);
#define sfl3(x,y,z) scanf("%lld%lld%lld",&x,&y,&z);
#define sfl4(x,y,z,x1) scanf("%lld%lld%lld%lld",&x,&y,&z,&x1);
#define sfl5(x,y,z,x1,y1) scanf("%lld%lld%lld%lld%lld",&x,&y,&z,&x1,&y1);
#define sfl6(x,y,z,x1,y1,z1) scanf("%lld%lld%lld%lld%lld%lld",&x,&y,&z,&x1,&y1,&z1);
 
#define sfs(x) scanf("%s",x);
#define sfs2(x,y) scanf("%s%s",x,y);
#define sfs3(x,y,z) scanf("%s%s%s",x,y,z);
// ----</SCANF>-----
 
// ----<PRINTF>-----
#define pfi(x) printf("%d\n",x);
#define pfi2(x,y) printf("%d %d\n",x,y);
#define pfi3(x,y,z) printf("%d %d %d\n",x,y,z);
 
#define pfl(x) printf("%lld\n",x);
#define pfl2(x,y) printf("%lld %lld\n",x,y);
#define pfl3(x,y,z) printf("%lld %lld %lld\n",x,y,z);
 
#define pfs(x) printf("%s\n",x);
#define pfs2(x,y) printf("%s %s\n",x,y);
#define pfs3(x,y,z) printf("%s %s %s\n",x,y,z);
 
#define pwe(x) printf("%lld ",x); // print without end
// ----</PRINTF>----
 
#define FLSH fflush(stdout)
#define fileIO(name) \
    freopen(name".in", "r", stdin); \
    freopen(name".out", "w", stdout);
#define PRECISION(x) cout << fixed << setprecision(x); 
#define FAST_IO ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
 
// ----------------</Defines and typedefs>----------------
 
// -------------------<Debugging stuff>-------------------
#define TRACE
 
#ifdef TRACE
#define trace(...) __f(#__VA_ARGS__, __VA_ARGS__)
template <typename Arg1>
void __f(const char* name, Arg1&& arg1){
    cerr << name << " : " << arg1 << std::endl;
}
template <typename Arg1, typename... Args>
void __f(const char* names, Arg1&& arg1, Args&&... args){
    const char* comma = strchr(names + 1, ',');cerr.write(names, comma - names) << " : " << arg1<<" | ";__f(comma+1, args...);
}
#else
#define trace(...)
#endif
 
// ------------------</Debugging stuff>-------------------
 
// ------------------------<Consts>-----------------------
const int MAXN = 1000005;
const int SQRTN = 1003;
const int LOGN = 22;
const double PI=acos(-1);
 
#ifdef int
const int INF=1e16;
#else
const int INF=1e9;
#endif
 
const int MOD = 1000000007;
const int FMOD = 998244353;
const double eps = 1e-9;
 
// -----------------------</Consts>-----------------------
 
// -------------------------<RNG>-------------------------
mt19937 RNG(chrono::steady_clock::now().time_since_epoch().count()); 
#define SHUF(v) shuffle(all(v), RNG);
// Use mt19937_64 for 64 bit random numbers.
 
// ------------------------</RNG>-------------------------
 
// ----------------------<MATH>---------------------------
template<typename T> T gcd(T a, T b){return(b?__gcd(a,b):a);}
template<typename T> T lcm(T a, T b){return(a*(b/gcd(a,b)));}
int add(int a, int b, int c = MOD){int res=a+b;return(res>=c?res-c:res);}
int mod_neg(int a, int b, int c = MOD){int res;if(abs(a-b)<c)res=a-b;else res=(a-b)%c;return(res<0?res+c:res);}
int mul(int a, int b, int c = MOD){ll res=(ll)a*b;return(res>=c?res%c:res);}
int muln(int a, int b, int c = MOD){ll res=(ll)a*b;return ((res%c)+c)%c;}
ll mulmod(ll a,ll b, ll m = MOD){ll q = (ll)(((LD)a*(LD)b)/(LD)m);ll r=a*b-q*m;if(r>m)r%=m;if(r<0)r+=m;return r;}
template<typename T>T expo(T e, T n){T x=1,p=e;while(n){if(n&1)x=x*p;p=p*p;n>>=1;}return x;}
template<typename T>T power(T e, T n, T m = MOD){T x=1,p=e;while(n){if(n&1)x=mul(x,p,m);p=mul(p,p,m);n>>=1;}return x;}
template<typename T>T extended_euclid(T a, T b, T &x, T &y){T xx=0,yy=1;y=0;x=1;while(b){T q=a/b,t=b;b=a%b;a=t;\
t=xx;xx=x-q*xx;x=t;t=yy;yy=y-q*yy;y=t;}return a;}
template<typename T>T mod_inverse(T a, T n = MOD){T x,y,z=0;T d=extended_euclid(a,n,x,y);return(d>1?-1:mod_neg(x,z,n));}
 
const int FACSZ = 1; // Make sure to change this
 
int fact[FACSZ],ifact[FACSZ];
 
void precom(int c = MOD){
    fact[0] = 1;
    FOR(i,1,FACSZ) fact[i] = mul(fact[i-1],i,c);
    ifact[FACSZ-1] = mod_inverse(fact[FACSZ-1],c);
    REPD(i,FACSZ-1){
        ifact[i] = mul(i+1,ifact[i+1],c);
    }
}
 
int ncr(int n,int r,int c = MOD){
    return mul(mul(ifact[r],ifact[n-r],c),fact[n],c);
} 
// ----------------------</MATH>--------------------------
// --------------------------------------------------</TEMPLATE>--------------------------------------------------
 
void solvethetestcase();
 
signed main(){
    // (UNCOMMENT FOR CIN/COUT) \
    FAST_IO
    PRECISION(10)
 
    int t = 1;
    // (UNCOMMENT FOR MULTIPLE TEST CASES) \
    sfl(t);
    FOR(testcase,1,t+1){
        // (UNCOMMENT FOR CODEJAM) \
        printf("Case #%lld: ",testcase); 
        solvethetestcase();
    }
}   
 
int n,m;
set<pii> adj[100005];
bitset<100005> vis;
vpii edges;
int ans[500005];
int lef[100005];
 
void solvethetestcase(){
    sfl2(n,m)
    if(m > n){
        printf("0\n");
        return;
    }
    FOR(i,1,n+1) sfl(lef[i]);
    REP(i,m){
        int u,v; sfl2(u,v)
        adj[u].insert({v,i});
        adj[v].insert({u,i});
        edges.pb({u,v});
    }
    int cnt = 0;
    queue<int> q;
    FOR(i,1,n+1){
        if(adj[i].size() == 1){
            q.push(i);
            cnt++;
            vis[i] = 1;
        }
    }
    while(q.size()){
        int u = q.front();
        q.pop();
        if(adj[u].size() == 0) continue;
        pii gg = *adj[u].begin();   
        adj[u].clear();

        // trace(u,gg.F,gg.S,ans[gg.S],lef[u],lef[gg.F]);

        ans[gg.S] = lef[u]*2;
        lef[gg.F] -= lef[u];
        lef[u] = 0;

        // trace(u,gg.F,gg.S,ans[gg.S],lef[u],lef[gg.F]);

        adj[gg.F].erase({u,gg.S});
        if(adj[gg.F].size() == 1){
            q.push(gg.F);
            cnt++;
            vis[gg.F] = 1;
        }
    }
    if(cnt == n){
        int flag = 1;
        FOR(i,1,n+1){
            if(lef[i]) flag = 0;
        }
        if(flag){
            REP(i,m) pfl(ans[i])
        }
        else{
            printf("0\n");
        }
        return;
    }
    if((n-cnt)%2 == 0){
        printf("0\n");
        return;
    }
}

Compilation message

pipes.cpp:54:1: warning: multi-line comment [-Wcomment]
 // typedef tree<int,null_type,less<int>,rb_tree_tag, \
 ^
pipes.cpp:210:5: warning: multi-line comment [-Wcomment]
     // (UNCOMMENT FOR CIN/COUT) \
     ^
pipes.cpp:215:5: warning: multi-line comment [-Wcomment]
     // (UNCOMMENT FOR MULTIPLE TEST CASES) \
     ^
pipes.cpp:218:9: warning: multi-line comment [-Wcomment]
         // (UNCOMMENT FOR CODEJAM) \
         ^
pipes.cpp: In function 'void solvethetestcase()':
pipes.cpp:94:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 #define sfl2(x,y) scanf("%lld%lld",&x,&y);
                   ~~~~~^~~~~~~~~~~~~~~~~~
pipes.cpp:232:5: note: in expansion of macro 'sfl2'
     sfl2(n,m)
     ^~~~
pipes.cpp:93:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 #define sfl(x) scanf("%lld",&x);
                ~~~~~^~~~~~~~~~~
pipes.cpp:237:18: note: in expansion of macro 'sfl'
     FOR(i,1,n+1) sfl(lef[i]);
                  ^~~
pipes.cpp:94:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 #define sfl2(x,y) scanf("%lld%lld",&x,&y);
                   ~~~~~^~~~~~~~~~~~~~~~~~
pipes.cpp:239:18: note: in expansion of macro 'sfl2'
         int u,v; sfl2(u,v)
                  ^~~~

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 5120 KB Output is correct
2 Correct 7 ms 4992 KB Output is correct
3 Correct 8 ms 5248 KB Output is correct
4 Correct 147 ms 23144 KB Output is correct
5 Correct 7 ms 4992 KB Output is correct
6 Correct 7 ms 4992 KB Output is correct
7 Correct 7 ms 4992 KB Output is correct
8 Correct 8 ms 4992 KB Output is correct
9 Correct 10 ms 5120 KB Output is correct
10 Correct 8 ms 5248 KB Output is correct
11 Correct 9 ms 5376 KB Output is correct
12 Correct 8 ms 5248 KB Output is correct
13 Correct 156 ms 19400 KB Output is correct
14 Correct 151 ms 22116 KB Output is correct
15 Correct 156 ms 23108 KB Output is correct
16 Correct 147 ms 20436 KB Output is correct
17 Correct 154 ms 23116 KB Output is correct
18 Correct 154 ms 23140 KB Output is correct
19 Correct 134 ms 22796 KB Output is correct
20 Correct 7 ms 5120 KB Output is correct
21 Correct 8 ms 5248 KB Output is correct
22 Correct 156 ms 23144 KB Output is correct
23 Correct 127 ms 19440 KB Output is correct
24 Correct 159 ms 23140 KB Output is correct
25 Correct 129 ms 20196 KB Output is correct

Subtask #2
44.0740740741 / 70.0

# Verdict Execution time Memory Grader output
1 Incorrect 7 ms 5120 KB Output isn't correct
2 Incorrect 9 ms 5248 KB Output isn't correct
3 Correct 123 ms 21588 KB Output is correct
4 Correct 7 ms 4992 KB Output is correct
5 Correct 7 ms 4992 KB Output is correct
6 Correct 8 ms 4992 KB Output is correct
7 Incorrect 8 ms 4992 KB Output isn't correct
8 Incorrect 8 ms 4992 KB Output isn't correct
9 Correct 7 ms 4992 KB Output is correct
10 Correct 7 ms 4992 KB Output is correct
11 Correct 8 ms 5120 KB Output is correct
12 Correct 7 ms 4992 KB Output is correct
13 Correct 9 ms 5064 KB Output is correct
14 Incorrect 7 ms 5120 KB Output isn't correct
15 Incorrect 9 ms 5248 KB Output isn't correct
16 Incorrect 9 ms 5120 KB Output isn't correct
17 Correct 9 ms 5248 KB Output is correct
18 Correct 7 ms 5120 KB Output is correct
19 Correct 7 ms 4992 KB Output is correct
20 Correct 8 ms 4992 KB Output is correct
21 Correct 9 ms 4992 KB Output is correct
22 Incorrect 8 ms 5248 KB Output isn't correct
23 Incorrect 92 ms 19160 KB Output isn't correct
24 Incorrect 120 ms 22500 KB Output isn't correct
25 Correct 125 ms 21476 KB Output is correct
26 Correct 8 ms 4992 KB Output is correct
27 Correct 8 ms 4992 KB Output is correct
28 Correct 7 ms 5120 KB Output is correct
29 Correct 7 ms 4992 KB Output is correct
30 Incorrect 113 ms 21988 KB Output isn't correct
31 Incorrect 97 ms 22504 KB Output isn't correct
32 Incorrect 170 ms 22628 KB Output isn't correct
33 Correct 114 ms 22480 KB Output is correct
34 Correct 7 ms 4992 KB Output is correct
35 Correct 7 ms 5088 KB Output is correct
36 Correct 7 ms 4992 KB Output is correct
37 Correct 8 ms 5120 KB Output is correct
38 Incorrect 143 ms 22376 KB Output isn't correct
39 Incorrect 143 ms 22504 KB Output isn't correct
40 Incorrect 119 ms 22512 KB Output isn't correct
41 Correct 96 ms 22336 KB Output is correct
42 Correct 8 ms 4992 KB Output is correct
43 Correct 8 ms 4992 KB Output is correct
44 Correct 7 ms 4992 KB Output is correct
45 Correct 8 ms 5120 KB Output is correct
46 Incorrect 113 ms 22380 KB Output isn't correct
47 Incorrect 137 ms 22520 KB Output isn't correct
48 Incorrect 104 ms 22372 KB Output isn't correct
49 Correct 130 ms 21604 KB Output is correct
50 Correct 7 ms 5120 KB Output is correct
51 Correct 8 ms 4992 KB Output is correct
52 Correct 7 ms 4992 KB Output is correct
53 Correct 7 ms 4992 KB Output is correct
54 Incorrect 128 ms 22296 KB Output isn't correct