oj.uz

답안 #408350

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
408350 2021-05-19T07:07:20 Z balbit 장난감 기차 (IOI17_train) C++14
23 / 100
 995 ms 1976 KB 
#include "train.h"

#include <bits/stdc++.h>
using namespace std;
//#define BALBIT
#define ll long long
#define y1 zck_is_king
#define pii pair<int, int>
#define ull unsigned ll
#define f first
#define s second
#define ALL(x) x.begin(),x.end()
#define SZ(x) (int)x.size()
#define SQ(x) (x)*(x)
#define MN(a,b) a = min(a,(__typeof__(a))(b))
#define MX(a,b) a = max(a,(__typeof__(a))(b))
#define pb push_back
#define REP(i,n) for (int i = 0; i<n; ++i)
#define RREP(i,n) for (int i = n-1; i>=0; --i)
#define REP1(i,n) for (int i = 1; i<=n; ++i)
#define SORT_UNIQUE(c) (sort(c.begin(),c.end()), c.resize(distance(c.begin(),unique(c.begin(),c.end()))))
#ifdef BALBIT
#define IOS()
#define bug(...) fprintf(stderr,"#%d (%s) = ",__LINE__,#__VA_ARGS__),_do(__VA_ARGS__);
template<typename T> void _do(T &&x){cerr<<x<<endl;}
template<typename T, typename ...S> void _do(T &&x, S &&...y){cerr<<x<<", ";_do(y...);}
#else
#define IOS() ios_base::sync_with_stdio(0);cin.tie(0);
#define endl '\n'
#define bug(...)
#endif

const int iinf = 1e9+10;
const ll inf = 1ll<<60;
const ll mod = 1e9+7 ;


void GG(){cout<<"0\n"; exit(0);}

ll mpow(ll a, ll n, ll mo = mod){ // a^n % mod
    ll re=1;
    while (n>0){
        if (n&1) re = re*a %mo;
        a = a*a %mo;
        n>>=1;
    }
    return re;
}

ll inv (ll b, ll mo = mod){
    if (b==1) return b;
    return (mo-mo/b) * inv(mo%b,mo) % mo;
}

const int maxn = 5e3+5;

bool win[maxn];
int safe[maxn]; // safe edges coming out of this node

vector<int> g[maxn];
bool notcyc[maxn];
vector<int> rg[maxn];

std::vector<int> win2(std::vector<int> who, std::vector<int> station, std::vector<int> UU, std::vector<int> VV) {
	int n = SZ(who);
	std::vector<int> res(n);
	REP(i,n) g[i].clear(), rg[i].clear();
	memset(win, 0, sizeof win);
	memset(safe, 0, sizeof safe);
	memset(notcyc, 0, sizeof notcyc);
    REP(i,SZ(UU)) {
        g[UU[i]].pb(VV[i]);
        rg[VV[i]].pb(UU[i]);
    }
//    return res;
    REP(round, 3)
    REP(T, n) {
        if (res[T]) continue;
        // T is target node
        if (!station[T]) continue;
        // who = 1: any is required to win
        REP(i,n) safe[i] = SZ(g[i]);
        memset(win, 0, sizeof win);
        win[T] = 1;
        queue<int> q;
        REP(i,n) if (res[i] || i==T) q.push(i);
        while (!q.empty() ){
            int v = q.front(); q.pop();
            for (int u : rg[v]) {
                if (!win[u]) {
                    if (who[u] == 1) {
                        // any required
//                        bug(u, who[u]);
                        win[u] = 1; q.push(u);
                    }else{
                        -- safe[u];
                        if (safe[u] == 0) {
                            q.push(u);
                            win[u] = 1;
                        }
                    }
                }
            }
        }
//        continue;
        bool ok = 0;
        if (who[T] == 1) {
            // any required
            for (int u : g[T]) {
                if (win[u]) {
                    ok = 1; break;
                }
            }
        }else{
            ok = 1;
            for (int u : g[T]) {
                if (!win[u]) {
//                    bug(T, u, win[u]);
                    ok=0; break;
                }
            }
        }
//        bug(T, ok);
        if (ok) {
            REP(i,n) {
//                bug(i, win[i]);
                if (win[i]) res[i] = 1;
            }
        }
    }
	return res;
}

//bitset<maxn> fren[maxn];
vector<int> love[maxn];
int nlove[maxn];
int seff[maxn][2];
bool touch[maxn][2];

std::vector<int> who_wins(std::vector<int> who, std::vector<int> station, std::vector<int> UU, std::vector<int> VV) {
	int n = SZ(who);
	std::vector<int> res(n);
	REP(i,n) g[i].clear(), rg[i].clear();
	memset(win, 0, sizeof win);
	memset(safe, 0, sizeof safe);
	memset(notcyc, 0, sizeof notcyc);
	memset(nlove, 0, sizeof nlove);
    REP(i,n) love[i].clear();
    REP(i,SZ(UU)) {
        g[UU[i]].pb(VV[i]);
        rg[VV[i]].pb(UU[i]);
    }
//    return res;
    {

        queue<int> q;
        REP(i,n) {
            if (station[i]) q.push(i), notcyc[i] = 1;
            else safe[i] = SZ(g[i]);
        }
        // create things that aren't zero-cycles
        while (!q.empty() ) {
            int v = q.front(); q.pop();
            for (int u : rg[v]) {
                if (!notcyc[u]) {
                    if (who[u] == 1) {
                        // i like stations!
                        notcyc[u] = 1; q.push(u);
                    }else{
                        --safe[u];
                        if( safe[u] == 0) {
                            notcyc[u] = 1; q.push(u);
                        }
                    }
                }
            }
        }
    }
     REP(T, n) {
        if (res[T]) continue;
        // T is target node
        if(!(station[T] || (notcyc[T]))) {
            continue;
        }
        bug(T);
        // who = 1: any is required to win
        REP(i,n) seff[i][0] = seff[i][1] = SZ(g[i]);
        memset(touch, 0, sizeof touch);
        touch[T][station[T]] = 1;
        vector<pii> q; q.pb({T, station[T]});
        int IT = 0;
        while (IT < SZ(q)){
            int v = q[IT].f; bool B = q[IT].s; ++IT;
            if (!touch[v][0]) {
                touch[v][0] = 1; q.pb({v,0});
            }
            for (int u : rg[v]) {
                bool he = B | station[u];
                if (!touch[u][he]) {
                    if (who[u] == 1) {
                        // any required
//                        bug(u, who[u]);
                        touch[u][he] = 1; q.pb({u,he});
                    }else{
//                        -- seff[u][he];
                        if (--seff[u][B] <= 0) {
                            if (!touch[u][he]) {
                                q.pb({u,he});
                                touch[u][he] = 1;
                            }
                        }
                    }
                }
            }
        }
        bool ok = 0;
        if (!touch[T][1]) continue;
        if (who[T] == 1) {
            // any required
            for (int u : g[T]) {
                if (touch[u][1]) {
                    ok = 1; break;
                }
            }
        }else{
            ok = 1;
            for (int u : g[T]) {
                if (!touch[u][1]) {
//                    bug(T, u, win[u]);
                    ok=0; break;
                }
            }
        }
        bug(T, ok);
        touch[T][1] = ok;
        if (ok)
            REP(i,n){
                if (touch[i][0]) {
                    res[i] = 1;
    //                bug(T,i);
                }
            }

    }
    return res;

    memset(win, 0, sizeof win);
    {
        queue<int> q;
        REP(i,n) {
            if (!notcyc[i] || (who[i] == 1 && nlove[i] == 0)) {
                bug(i, notcyc[i]);
                q.push(i);
                win[i] = 1;
            }
//            safe[i] = SZ(g[i]);
        }
        bitset<maxn> alive;
        alive.set();
        while (!q.empty() ) {
            int v = q.front(); q.pop();
//            if (win[v]) continue;
            for (int u : rg[v]) {
                if (!win[u]) {
                    if (who[u] == 0) {
                        // i hate stations!
                        win[u] = 1; q.push(u);
                    }
                }
            }
            if (station[v]) {
                for (int u : love[v]) {
                    if (!win[u])
                        if (who[u] == 1 && (--nlove[u] <= 0) ) {
                            q.push(u); win[u] = 1;
                        }
                }
            }
        }

    }
    REP(i,n) res[i] = !win[i];
	return res;
}
#ifdef BALBIT
signed main() {
    int n,m; cin>>n>>m;
    REP(ffff, 1000) {
        vector<int >a,r;
        REP(i,n) a.pb(rand()%2);
        REP(i,n) {
            r.pb(rand()%2);
            if (r.back()) a[i] = 1;
        }
        vector<int> u,v;
        REP(i,m) {
            u.pb(rand()%n);
            if (i<n) u[i] = i;
            v.pb(rand()%n);
        }
        vector<int> r1 = win2(a,r,u,v);
        vector<int> r2 = who_wins(a,r,u,v);
        if (r1 != r2) {
            for (int x : r1) cout<<x<<' ';
            cout<<endl;
            for (int x : r2) cout<<x<<' ';
            cout<<endl;

            cout<<"A"<<endl;
            for (int x : a) cout<<x<<' ';
            cout<<endl;
            for (int x : r) cout<<x<<' ';
            cout<<endl;
            for (int x : u) cout<<x<<' ';
            cout<<endl;
            for (int x : v) cout<<x<<' ';
            cout<<endl;
            assert(0);
        }
    }
}
#endif
/*
2 4
0 1
1 0
0 0
0 1
1 0
1 1

*/

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 43 ms 1248 KB 3rd lines differ - on the 26th token, expected: '1', found: '0'
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 588 KB 3rd lines differ - on the 2nd token, expected: '1', found: '0'
2 Halted 0 ms 0 KB -

Subtask #3
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 963 ms 1840 KB Output is correct
2 Correct 870 ms 1836 KB Output is correct
3 Correct 995 ms 1976 KB Output is correct
4 Correct 13 ms 1916 KB Output is correct
5 Correct 421 ms 1764 KB Output is correct
6 Correct 826 ms 1688 KB Output is correct
7 Correct 15 ms 1776 KB Output is correct
8 Correct 13 ms 1644 KB Output is correct
9 Correct 11 ms 1452 KB Output is correct
10 Correct 14 ms 1616 KB Output is correct
11 Correct 27 ms 1648 KB Output is correct
12 Correct 10 ms 1484 KB Output is correct
13 Correct 10 ms 1740 KB Output is correct
14 Correct 12 ms 1716 KB Output is correct
15 Correct 12 ms 1740 KB Output is correct
16 Correct 15 ms 1740 KB Output is correct
17 Correct 28 ms 1740 KB Output is correct
18 Correct 784 ms 1740 KB Output is correct

Subtask #4
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 44 ms 1476 KB 3rd lines differ - on the 1st token, expected: '1', found: '0'
2 Halted 0 ms 0 KB -

Subtask #5
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 14 ms 1580 KB Output is correct
2 Correct 12 ms 1776 KB Output is correct
3 Correct 581 ms 1616 KB Output is correct
4 Correct 10 ms 1612 KB Output is correct
5 Correct 2 ms 716 KB Output is correct
6 Correct 5 ms 1100 KB Output is correct
7 Correct 9 ms 1188 KB Output is correct
8 Correct 32 ms 1228 KB Output is correct
9 Correct 24 ms 1312 KB Output is correct
10 Correct 3 ms 896 KB Output is correct
11 Correct 7 ms 1228 KB Output is correct

Subtask #6
0 / 51.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 43 ms 1248 KB 3rd lines differ - on the 26th token, expected: '1', found: '0'
2 Halted 0 ms 0 KB -