oj.uz

답안 #408335

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
408335 2021-05-19T07:00:22 Z balbit 장난감 기차 (IOI17_train) C++14
28 / 100
 943 ms 1968 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][he] <= 0) {
                            q.pb({u,he});
                            touch[u][he] = 1;
                        }
                    }
                }
            }
        }
        bool ok = 0;
        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
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 40 ms 1256 KB Output is correct
2 Correct 47 ms 1252 KB Output is correct
3 Correct 59 ms 1248 KB Output is correct
4 Correct 39 ms 1252 KB Output is correct
5 Correct 38 ms 1260 KB Output is correct
6 Correct 39 ms 1248 KB Output is correct
7 Correct 32 ms 1256 KB Output is correct
8 Correct 48 ms 1248 KB Output is correct
9 Correct 46 ms 1228 KB Output is correct
10 Correct 35 ms 1100 KB Output is correct
11 Correct 41 ms 1220 KB Output is correct

Subtask #2
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 588 KB Output is correct
2 Correct 2 ms 716 KB Output is correct
3 Correct 1 ms 588 KB Output is correct
4 Incorrect 1 ms 588 KB 3rd lines differ - on the 1st token, expected: '0', found: '1'
5 Halted 0 ms 0 KB -

Subtask #3
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 943 ms 1968 KB Output is correct
2 Correct 910 ms 1916 KB Output is correct
3 Correct 882 ms 1904 KB Output is correct
4 Correct 10 ms 1788 KB Output is correct
5 Correct 421 ms 1792 KB Output is correct
6 Correct 830 ms 1740 KB Output is correct
7 Correct 16 ms 1772 KB Output is correct
8 Correct 13 ms 1616 KB Output is correct
9 Correct 12 ms 1472 KB Output is correct
10 Correct 11 ms 1660 KB Output is correct
11 Correct 43 ms 1616 KB Output is correct
12 Correct 11 ms 1476 KB Output is correct
13 Correct 14 ms 1788 KB Output is correct
14 Correct 12 ms 1788 KB Output is correct
15 Correct 10 ms 1744 KB Output is correct
16 Correct 12 ms 1752 KB Output is correct
17 Correct 15 ms 1728 KB Output is correct
18 Correct 838 ms 1536 KB Output is correct

Subtask #4
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 17 ms 1588 KB Output is correct
2 Correct 45 ms 1472 KB Output is correct
3 Incorrect 13 ms 1496 KB 3rd lines differ - on the 108th token, expected: '0', found: '1'
4 Halted 0 ms 0 KB -

Subtask #5
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 14 ms 1612 KB Output is correct
2 Correct 11 ms 1740 KB Output is correct
3 Correct 605 ms 1620 KB Output is correct
4 Correct 9 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 6 ms 1228 KB Output is correct
8 Correct 38 ms 1228 KB Output is correct
9 Correct 26 ms 1312 KB Output is correct
10 Correct 4 ms 844 KB Output is correct
11 Correct 6 ms 1180 KB Output is correct

Subtask #6
0 / 51.0

# 결과 실행 시간 메모리 Grader output
1 Correct 40 ms 1256 KB Output is correct
2 Correct 47 ms 1252 KB Output is correct
3 Correct 59 ms 1248 KB Output is correct
4 Correct 39 ms 1252 KB Output is correct
5 Correct 38 ms 1260 KB Output is correct
6 Correct 39 ms 1248 KB Output is correct
7 Correct 32 ms 1256 KB Output is correct
8 Correct 48 ms 1248 KB Output is correct
9 Correct 46 ms 1228 KB Output is correct
10 Correct 35 ms 1100 KB Output is correct
11 Correct 41 ms 1220 KB Output is correct
12 Correct 1 ms 588 KB Output is correct
13 Correct 2 ms 716 KB Output is correct
14 Correct 1 ms 588 KB Output is correct
15 Incorrect 1 ms 588 KB 3rd lines differ - on the 1st token, expected: '0', found: '1'
16 Halted 0 ms 0 KB -