Submission #420304

#	Time	Username	Problem	Language	Result	Execution time	Memory
420304		b00n0rp	Crossing (JOI21_crossing)	C++17	100 / 100	3005 ms	37900 KiB

Main

// --------------------------------------------------<TEMPLATE>--------------------------------------------------
// --------------------<optimizations>--------------------
/*
#pragma GCC optimize("Ofast,unroll-loops")
#pragma GCC target("avx,avx2,fma")
*/ 
// -------------------</optimizations>--------------------
 
// ---------------<Headers and namespaces>----------------
#include <bits/stdc++.h>
using namespace std;
 
/*
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
*/
 
// ---------------</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 WL(t) while(t --)
#define SZ(x) ((int)(x).size())
#define runtime() ((double)clock() / CLOCKS_PER_SEC)
#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>-------------------
#ifdef TRACE
#define trace(...) __f(#__VA_ARGS__, __VA_ARGS__)
template <typename Arg1>
void __f(const char* name, Arg1&& arg1){
    cout << name << " : " << arg1 << std::endl;
}
template <typename Arg1, typename... Args>
void __f(const char* names, Arg1&& arg1, Args&&... args){
    const char* comma = strchr(names + 1, ',');cout.write(names, comma - names) << " : " << arg1<<" | ";__f(comma+1, args...);
}
#else
#define trace(...)
#endif
 
// ------------------</Debugging stuff>-------------------
 
// ------------------------<Consts>-----------------------
const int MAXN = 200005;
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(){
    // comment when using scanf,printf
    FAST_IO
    int t = 1;
    // (UNCOMMENT FOR MULTIPLE TEST CASES)
    // cin >> t;
    FOR(testcase,1,t+1){
        // (UNCOMMENT FOR CODEJAM)
        // printf("Case #%lld: ",testcase); 
        solvethetestcase();
    }
}   
 
int n,q;
int s[MAXN];
int t[MAXN];
int pref[MAXN][3];
int a[10][MAXN];
int ans[MAXN];
pair<pii,int> quer[MAXN];
int res;

int seg[4*MAXN],lazy[4*MAXN];

void operate(int ind1,int ind2,int fi){
    FOR(i,1,n+1){
        if(a[ind1][i] == a[ind2][i]) a[fi][i] = a[ind1][i];
        else if(a[ind1][i] != 0 and a[ind2][i] != 0) a[fi][i] = 0;
        else if(a[ind1][i] != 1 and a[ind2][i] != 1) a[fi][i] = 1;
        else a[fi][i] = 2;
    }
}

void build(int node,int l,int r){
    lazy[node] = -1;
    if(l == r){
        seg[node] = (s[l]==t[l]);
        return;
    }
    int m = (l+r)/2;
    build(2*node,l,m);
    build(2*node+1,m+1,r);
    seg[node] = seg[2*node]+seg[2*node+1];
}

void propogate(int node,int l,int r){
    if(lazy[node] == -1) return;
    seg[node] = pref[r][lazy[node]]-pref[l-1][lazy[node]];
    if(l != r){
        lazy[2*node] = lazy[node];
        lazy[2*node+1] = lazy[node];
    }
    lazy[node] = -1;
}

void update(int node,int l,int r,int x,int y,int val){
    propogate(node,l,r);
    if(x > r or l > y) return;
    if(l >= x and r <= y){
        res += pref[r][val]-pref[l-1][val];
        res -= seg[node];
        lazy[node] = val;
        propogate(node,l,r);
        return;
    }
    int m = (l+r)/2;
    update(2*node,l,m,x,y,val);
    update(2*node+1,m+1,r,x,y,val);
    seg[node] = seg[2*node]+seg[2*node+1];
}
 
void solvethetestcase(){
    cin >> n;
    REP(i,3){
        string cur; cin >> cur;
        REP(j,n){
            if(cur[j] == 'J') a[i][j+1] = 0;
            if(cur[j] == 'O') a[i][j+1] = 1;
            if(cur[j] == 'I') a[i][j+1] = 2;
        }
    }
    cin >> q;
    string cur; cin >> cur;
    REP(i,n){
        if(cur[i] == 'J') t[i+1] = 0;
        if(cur[i] == 'O') t[i+1] = 1;
        if(cur[i] == 'I') t[i+1] = 2;
    }
    FOR(i,1,q+1){
        cin >> quer[i].F.F >> quer[i].F.S;
        char c; cin >> c;
        if(c == 'J') quer[i].S = 0;
        if(c == 'O') quer[i].S = 1;
        if(c == 'I') quer[i].S = 2;
        ans[i] = 0;
    }
    operate(0,1,3);
    operate(0,2,4);
    operate(1,2,5);
    operate(3,2,6);
    operate(4,1,7);
    operate(5,0,8);
    REP(i,9){
        FOR(j,1,n+1){
            s[j] = a[i][j];
            pref[j][0] = pref[j-1][0];
            pref[j][1] = pref[j-1][1];
            pref[j][2] = pref[j-1][2];
            pref[j][s[j]]++;
        }
        build(1,1,n);
        res = seg[1];
        if(res == n) ans[0] = 1;
        FOR(j,1,q+1){
            update(1,1,n,quer[j].F.F,quer[j].F.S,quer[j].S);
            if(res == n) ans[j] = 1;
        }
    }
    REP(i,q+1){
        if(ans[i]) cout << "Yes\n";
        else cout << "No\n";
    }
}

• Subtask 1: 3 / 3
• Subtask 2: 23 / 23
• Subtask 3: 23 / 23
• Subtask 4: 51 / 51