제출 #939149

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
939149		vjudge1	Dango Maker (JOI18_dango_maker)	C++17	13 / 100	109 ms	255920 KiB

dango_maker

#include <bits/stdc++.h>  
using namespace std;
#pragma GCC target("avx2")
#pragma GCC optimize("Ofast") 
//#pragma comment(linker, "/stack:200000000") 
#pragma GCC target( "sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native" ) 
#pragma GCC optimize("unroll-loops")
/* 
#pragma GCC optimize("profile-values,profile-reorder-functions,tracer") 
#pragma GCC optimize("vpt") 
#pragma GCC optimize("rename-registers") 
#pragma GCC optimize("move-loop-invariants") 
#pragma GCC optimize("unswitch-loops") 
#pragma GCC optimize("function-sections") 
#pragma GCC optimize("data-sections") 
#pragma GCC optimize("branch-target-load-optimize") 
#pragma GCC optimize("branch-target-load-optimize2") 
#pragma GCC optimize("btr-bb-exclusive") 
#pragma GCC optimize("inline")
#pragma GCC optimize("-fgcse") 
#pragma GCC optimize("-fgcse-lm") 
#pragma GCC optimize("-fipa-sra") 
#pragma GCC optimize("-ftree-pre") 
#pragma GCC optimize("-ftree-vrp") 
#pragma GCC optimize("-fpeephole2") 
#pragma GCC optimize("-ffast-math") 
#pragma GCC optimize("-fsched-spec") 
#pragma GCC optimize("-falign-jumps") 
#pragma GCC optimize("-falign-loops") 
#pragma GCC optimize("-falign-labels") 
#pragma GCC optimize("-fdevirtualize") 
#pragma GCC optimize("-fcaller-saves") 
#pragma GCC optimize("-fcrossjumping") 
#pragma GCC optimize("-fthread-jumps") 
#pragma GCC optimize("-freorder-blocks") 
#pragma GCC optimize("-fschedule-insns") 
#pragma GCC optimize("inline-functions") 
#pragma GCC optimize("-ftree-tail-merge") 
#pragma GCC optimize("-fschedule-insns2") 
#pragma GCC optimize("-fstrict-aliasing") 
#pragma GCC optimize("-falign-functions") 
#pragma GCC optimize("-fcse-follow-jumps") 
#pragma GCC optimize("-fsched-interblock") 
#pragma GCC optimize("-fpartial-inlining") 
#pragma GCC optimize("no-stack-protector") 
#pragma GCC optimize("-freorder-functions") 
#pragma GCC optimize("-findirect-inlining") 
#pragma GCC optimize("-fhoist-adjacent-loads") 
#pragma GCC optimize("-frerun-cse-after-loop") 
#pragma GCC optimize("inline-small-functions") 
#pragma GCC optimize("-finline-small-functions") 
#pragma GCC optimize("-ftree-switch-conversion") 
#pragma GCC optimize("-foptimize-sibling-calls") 
#pragma GCC optimize("-fexpensive-optimizations") 
#pragma GCC optimize("inline-functions-called-once") 
#pragma GCC optimize("-fdelete-null-pointer-checks")
*/
#define ll long long 
#define all(x) x.begin(),x.end()
#define sz(x) (int) x.size()
#define f first
#define s second
#define ld long double
#define yes cout << "YES" << endl
#define no cout << "NO" << endl
#define pb push_back
#define dauzhan gay
#define popcount __builtin_popcount
const long double Eps = 1e-12; 
const int max1 = 1e9 + 100; 
const int min1 = -1e9 *1.4;
const ll mod1 = 1000000007;
const ll mod2 = 2000000011;
const ll mod3 = 3000000017;
const ll mod = 998244353;
const int N = 2e5 + 100;
const int B = 9000000 + 1;
const ll INF = 1e18 + 100;
//mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
ll binpow(ll x,ll y,ll md) {
    if(y < 0) return 0;
    if(y == 0) return 1;        
    if(y == 1) return x;
    if(y % 2 == 0) {
        ll now = binpow(x,y/2,md);
        return (1ll*now*now) % md;
    }
    else {
        ll now = binpow(x,y/2,md);
        return (1ll*((1ll*now*now) % md)*x) % md;
    }
}
/*
for(int i = 1;i <= n;i++) sp[0][i] = a[i];
for(int i = 1;i <= log2(n);i++) {
    for(int l = 1;l <= n;l++) {
        int r = l + (1 << i) - 1;
        if(r > n) break;
        int middle = l + (1 << (i - 1));
        sp[i][l] = max(sp[i - 1][l],sp[i - 1][middle]);
    }
}
int get(int l,int r) {
    int g = log2(r - l + 1);
    return max(sp[g][l],sp[g][r - (1 << g) + 1]);
} 
*/
int matching[B];
bool used[B];
vector <int> reb[B];
bool dfs(int v) {
    if(used[v]) return false;
    used[v] = true;
    for(auto to:reb[v]) {
        if(matching[to] == -1 || dfs(matching[to])) {
            matching[to] = v;
            return true;
        }
    }
    return false;
}
int n,m;

int f(int x,int y) {
    return (x - 1)*m + y;
}
pair <int,int> g(int x) {
    int b = x % m;
    if(b == 0) b = m;
    return {(x - b)/m + 1,b};
}
signed main() {
    ios_base::sync_with_stdio(NULL);
    cin.tie(0);
    cout.tie(0);    
    cin >> n >> m;
    char a[n + 1][m + 1];
    for(int i = 1;i <= n;i++) {
        for(int j = 1;j <= m;j++) {
            cin >> a[i][j];
        }
    }
    //a[i][j] = (i - 1)*m + j;
    memset(matching,-1,sizeof(matching));
    for(int i = 1;i <= n;i++) {
        for(int j = 1;j <= m;j++) {
            if(a[i][j] == 'G') {
                if((i < n&&a[i + 1][j] == 'W') || (j < m&&a[i][j + 1] == 'W')) {
                    if(i > 1&&a[i - 1][j] == 'R') {
                        int x = f(i - 1,j);
                        int y = f(i,j);
                        reb[x].pb(y);
                        reb[y].pb(x);
                    }
                    if(j > 1&&a[i][j - 1] == 'R') {
                        int x = f(i,j - 1);
                        int y = f(i,j);
                        reb[x].pb(y);
                        reb[y].pb(x);
                    }
                }
            }
        }
    }
    for(int i = 1;i <= n*m;i++) {
        memset(used,false,sizeof(used));
        dfs(i);
    }
    bool chose[n + 1][m + 1];
    for(int i = 1;i <= n;i++) {
        for(int j = 1;j <= m;j++) {
            chose[i][j] = false;
        }
    }
    for(int i = 1;i <= n*m;i++) {
        if(matching[i] != -1) {
            int x = i,y = matching[i];
            int x1 = g(x).f,y1 = g(x).s;
            int x2 = g(y).f,y2 = g(y).s;
            if(x1 > n || x1 < 1 || y1 > m || y1 < 1 || x2 > n || x2 < 1) {
                cout << 1/0 << endl;
                exit(0);
            }
            if(a[x1][y1] == 'G') {
                chose[x1][y1] = true;
            }
            if(a[x2][y2] == 'G') {
                chose[x2][y2] = true;
            }
        }
    }
    int ans = 0;
    for(int i = 1;i <= n;i++) {
        for(int j = 1;j <= m;j++) {
            if(a[i][j] == 'W') {
                if(j > 1&&chose[i][j - 1]) {
                    chose[i][j - 1] = false;
                    ans++;
                }
                else if(i > 1&&chose[i - 1][j]) {
                    chose[i - 1][j] = false;
                    ans++;
                }
            }
        }
    }
    cout << ans << endl;
}

    
    
     
    
    

컴파일 시 표준 에러 (stderr) 메시지

dango_maker.cpp: In function 'int main()':
dango_maker.cpp:181:26: warning: division by zero [-Wdiv-by-zero]
  181 |                 cout << 1/0 << endl;
      |                         ~^~

• Subtask 1: 13 / 13
• Subtask 2: 0 / 20
• Subtask 3: 0 / 67