Submission #201276

#	Time	Username	Problem	Language	Result	Execution time	Memory
201276		BThero	Naan (JOI19_naan)	C++17	24 / 100	40 ms	63608 KiB

naan

// Why am I so dumb? :c
// chrono::system_clock::now().time_since_epoch().count()
                                                  
#include<bits/stdc++.h>
//#include<ext/pb_ds/assoc_container.hpp>
//#include<ext/pb_ds/tree_policy.hpp>

#define pb push_back
#define mp make_pair

#define all(x) (x).begin(), (x).end()

#define fi first
#define se second

using namespace std;
//using namespace __gnu_pbds;

typedef long long ll;   
typedef pair<int, int> pii;
//template<typename T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;

const int MAXN = (int)2e3 + 5;

struct Ratio {
    ll a, b;

    Ratio() {
        a = 0;
        b = 1;
    }    

    Ratio(ll a, ll b) : a(a), b(b) {}
} limS[MAXN], curS[MAXN], sep[MAXN];

int lcm(int a, int b) {
    return a / __gcd(a, b) * b;
}

bool operator < (Ratio f, Ratio s) {
    return f.a * s.b < f.b * s.a;             
}

bool operator > (Ratio f, Ratio s) {
    return s < f;
}

bool operator == (Ratio f, Ratio s) {
    return !(f < s) && !(s < f);
}

bool operator <= (Ratio f, Ratio s) {
    return f < s || f == s;    
}

bool operator >= (Ratio f, Ratio s) {
    return f > s || f == s;
}

Ratio operator + (Ratio f, Ratio s) {
    int d = lcm(f.b, s.b);
    return Ratio(f.a * d / f.b + s.a * d / s.b, d);           
}

Ratio operator - (Ratio f, Ratio s) {
    s.a *= -1;
    return f + s;
}

Ratio operator * (Ratio f, Ratio s) {
    return Ratio(f.a * s.a, f.b * s.b);
}

Ratio operator / (Ratio f, Ratio s) {
    swap(s.a, s.b);
    return f * s;
}

Ratio arr[MAXN][MAXN];

Ratio coef[MAXN];

int perm[MAXN];

int n, m;

void solve() {
    scanf("%d %d", &n, &m);

    for (int i = 1; i <= n; ++i) {
        for (int j = 1; j <= m; ++j) {
            scanf("%d", &arr[i][j].a);
            arr[i][j].b = 1;
            limS[i] = limS[i] + arr[i][j];
        }

        limS[i].b = n;
    }

    for (int i = 1; i <= n; ++i) {
        perm[i] = i;
    }

    do {        
        int ptr = 1;
        fill(curS + 1, curS + n + 1, Ratio(0, 1));
        bool ok = 1;

        for (int i = 1; i <= m; ++i) {
            coef[i] = Ratio(1, 1);            
        }
                  
        for (int i = 1; i <= n; ++i) {
            int id = perm[i];
            //printf("! %d - %d/%d\n", ptr, coef[ptr].a, coef[ptr].b);

            while (ptr <= m && curS[id] + arr[id][ptr] * coef[ptr] <= limS[id]) {
                curS[id] = curS[id] + arr[id][ptr] * coef[ptr];
                ++ptr;                
            }

            if (ptr > m) {
                if (curS[id] < limS[id]) {
                    ok = 0;
                }
                
                break;
            }            

            sep[i] = (limS[id] - curS[id]) / arr[id][ptr];
            curS[id] = curS[id] + sep[i] * arr[id][ptr];
            Ratio tmp = coef[ptr];
            coef[ptr] = coef[ptr] - sep[i];
            sep[i] = sep[i] + Ratio(ptr, 1) - tmp;           
        }

        for (int i = 1; i <= n; ++i) {
            ok &= (curS[i] >= limS[i]);
        }

        if (ok) {
            for (int i = 1; i < n; ++i) {
                printf("%lld %lld\n", sep[i].a, sep[i].b);
            }

            for (int i = 1; i <= n; ++i) {
                printf("%d%c", perm[i], " \n"[i == n]);
            }

            return;
        }        
    }
    while (next_permutation(perm + 1, perm + n + 1));

    printf("-1\n");
}

int main() {
    int tt = 1;

    while (tt--) {
        solve();
    }

    return 0;
}

Compilation message (stderr)

naan.cpp: In function 'void solve()':
naan.cpp:92:37: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'll* {aka long long int*}' [-Wformat=]
             scanf("%d", &arr[i][j].a);
                         ~~~~~~~~~~~~^
naan.cpp:88:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &n, &m);
     ~~~~~^~~~~~~~~~~~~~~~~
naan.cpp:92:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d", &arr[i][j].a);
             ~~~~~^~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 24 / 24
• Subtask 3: 0 / 71