Submission #3157444

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#include <bits/stdc++.h>
using namespace std;

#define NDEBUG
#ifdef DEBUG
#include "../cout11.h"
#undef NDEBUG
#endif
#include <cassert>

typedef long long ll;
typedef long double Double;
typedef unsigned long long ull;
typedef pair<int,int> ii;
typedef pair<ll,ll> llll;
typedef pair<double,double> dd;

typedef vector<int> vi;
typedef vector<vector<int>> vvi;
typedef vector<ii> vii;
typedef vector<vector<ii>> vvii;
typedef vector<ll> vll;
typedef vector<string> vs;
typedef vector<double> vd;
typedef vector<long double> vD;

#define sz(a)  int((a).size())
#define pb  push_back
#define FOR(var,from,to) for(int var=(from);var<=(to);++var)
#define rep(var,n)  for(int var=0;var<(n);++var)
#define rep1(var,n)  for(int var=1;var<=(n);++var)
#define repC2(vari,varj,n)  for(int vari=0;vari<(n)-1;++vari)for(int varj=vari+1;varj<(n);++varj)
#define ALL(c)  (c).begin(),(c).end()
#define RALL(c)  (c).rbegin(),(c).rend()
#define tr(i,c)  for(auto i=(c).begin(); i!=(c).end(); ++i)
#define found(s,e)  ((s).find(e)!=(s).end())
#define mset(arr,val)  memset(arr,val,sizeof(arr))
#define mid(x,y) ((x)+((y)-(x))/2)
#define IN(x,a,b) ((a)<=(x)&&(x)<=(b))
#define cons make_pair


ll gcd(ll a, ll b) { while(a) swap(a, b%=a); return b; }

const ll MOD=1000000007LL;

ll ADD(ll x, ll y) { return (x+y) % MOD; }
ll SUB(ll x, ll y) { return (x-y+MOD) % MOD; }
ll MUL(ll x, ll y) { return x*y % MOD; }
ll POW(ll x, ll e) { ll v=1; for(; e; x=MUL(x,x), e>>=1) if (e&1) v = MUL(v,x); return v; }
ll DIV(ll x, ll y) { /*assert(y%MOD!=0);*/ return MUL(x, POW(y, MOD-2)); }
// ll comb(ll n, ll k) { ll v=1; for(ll i=1; i<=k; i++) v = DIV(MUL(v, n-i+1),i); return v; }
//

#define INTSPACE 12
char _buf[INTSPACE*1000000 + 3];

int loadint() {
    if (fgets(_buf, INTSPACE+3, stdin)==NULL) return 0;
    return atoi(_buf);
}

int loadvec(vector<int>& v, int N=-1) {
    if (N == -1) {
        N = loadint();
        if (N==0) return 0;
    }
    int bufsize = INTSPACE*N + 3;
    if (fgets(_buf, bufsize, stdin)==NULL) return 0;
    v.resize(N);

    int i=0;
    bool last = false;
    for (char *p=&_buf[0]; ;) {
        char *q = p;
        while (*q > ' ') ++q;
        if (*q == 0x0D || *q == 0x0A) last = true;
        *q = 0;
        v[i++] = atoi(p);
        if (last || i == N) break;
        p = q+1;
    }
    // assert(i <= N);
    return i;
}
void read_cr() {
    fgets(_buf, 256, stdin);
}

void solve(int H, int W, vvi& a) {
    vvi ops;
    int dir = 1;
    rep(r, H) {
        if (dir == 1) {
            for (int c=0; c<W-1; ++c){
                if (a[r][c]%2) {
                    a[r][c]--; a[r][c+1]++; ///
                    ops.pb(vi{ r,c, r,c+1 });
                }
            }
            if (a[r][W-1]%2) {
                if (r < H-1) {
                    a[r][W-1]--; a[r+1][W-1]++;
                    ops.pb(vi{ r,W-1, r+1,W-1 });
                }
            }
        } else {
            for (int c=W-1; c>0; --c){
                if (a[r][c]%2) {
                    a[r][c]--; a[r][c-1]++; ///
                    ops.pb(vi{ r,c, r,c-1 });
                }
            }
            if (a[r][0]%2) {
                if (r < H-1) {
                    a[r][0]--; a[r+1][0]++;
                    ops.pb(vi{ r,0, r+1,0 });
                }
            }
        }
        dir *= -1;
    }

    int A = ops.size();
    printf("%d\n", A);
    rep(i, A){
        // ops[i] -> r1, c1, r2, c2
        printf("%d %d %d %d\n",
                ops[i][0]+1,
                ops[i][1]+1,
                ops[i][2]+1,
                ops[i][3]+1);
    }
}

int main() {
    int H, W; cin >> H >> W; read_cr();
    vvi a(H, vi(W));
    rep(i, H) loadvec(a[i], W);
    solve(H,W,a);
    return 0;
}

Submission Info

Submission Time
Task D - Make Them Even
User naoya_t
Language C++14 (GCC 5.4.1)
Score 400
Code Size 3856 Byte
Status
Exec Time 47 ms
Memory 10032 KB

Compile Error

./Main.cpp: In function ‘void read_cr()’:
./Main.cpp:87:28: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result]
     fgets(_buf, 256, stdin);
                            ^

Test Cases

Set Name Score / Max Score Test Cases
All 400 / 400 hand_1, hand_2, hand_3, hand_4, hand_5, hand_6, max_1, max_10, max_2, max_3, max_4, max_5, max_6, max_7, max_8, max_9, random_1, random_10, random_2, random_3, random_4, random_5, random_6, random_7, random_8, random_9, sample_01, sample_02, sample_03
Sample 0 / 0 sample_01, sample_02, sample_03
Case Name Status Exec Time Memory
hand_1 1 ms 256 KB
hand_2 1 ms 256 KB
hand_3 1 ms 256 KB
hand_4 1 ms 256 KB
hand_5 46 ms 9904 KB
hand_6 6 ms 1280 KB
max_1 47 ms 9904 KB
max_10 47 ms 9904 KB
max_2 47 ms 9904 KB
max_3 47 ms 9904 KB
max_4 47 ms 9904 KB
max_5 47 ms 9904 KB
max_6 47 ms 9904 KB
max_7 47 ms 9904 KB
max_8 47 ms 10032 KB
max_9 47 ms 9904 KB
random_1 2 ms 256 KB
random_10 7 ms 1468 KB
random_2 11 ms 2232 KB
random_3 16 ms 3128 KB
random_4 6 ms 1212 KB
random_5 9 ms 1848 KB
random_6 19 ms 4020 KB
random_7 15 ms 3128 KB
random_8 18 ms 3636 KB
random_9 27 ms 6708 KB
sample_01 1 ms 256 KB
sample_02 1 ms 256 KB
sample_03 1 ms 256 KB