Submission #284996

#	Time	Username	Problem	Language	Result	Execution time	Memory
284996		anonymous	JOIRIS (JOI16_joiris)	C++14	100 / 100	1 ms	384 KiB

joiris

#include <iostream>
#define MAXN 55
using namespace std;
int N, K, A[MAXN], Sum[MAXN]; //4N^2 operations
int Q, Ops[MAXN * MAXN * 4][2];

void hor(int x) {
    for (int i=x; i<x+K; i++) {
        A[i] += 1;
    }
    Ops[Q][0] = 2, Ops[Q][1] = x;
    Q++;
}

void vert(int x) {
    A[x] += K;
    Ops[Q][0] = 1, Ops[Q][1] = x;
    Q++;
}

void op1(int x) {
    while (true) {
        int maxh = 0;
        for (int i=x; i<x+K; i++) {
            maxh = max(maxh, A[i]);
        }
        bool good = true;
        for (int i=1; i<=N; i++) {
            if ((i < x || i >= x+K) && A[i] <= maxh) {
                vert(i);
                good = false;
            }
        }
        if (good) {
            hor(x);
            return;
        }
    }
}

void finish() {
    while (true) {
        int minh = 1<<30;
        for (int i=1; i<=N; i++) {
            minh = min(minh, A[i]);
        }
        for (int i=1; i<=N; i++) {
            A[i] -= minh;
        }
        bool okay = true;
        for (int i=1; i<=N; i++) {
            if (A[i]) {
                okay = false;
                break;
            }
        }
        if (!okay) {
            for (int i=1; i<=N; i++) {
                if (!A[i]) {
                    vert(i);
                }
            }
        } else {
            return;
        }
    }
}


int main() {
    //freopen("joirisin.txt","r",stdin);
    //freopen("joirisout.txt","w",stdout);
    scanf("%d %d",&N,&K);
    for (int i=1; i<=N; i++) {
        scanf("%d",&A[i]);
    }

    for (int i=1; i<N; i++) {
        Sum[i%K] = (Sum[i%K] + A[i+1] - A[i] + K) % K;
    }
    while (N > K && Sum[N%K]) {
        op1(N-K+1), Sum[N%K]=(Sum[N%K]+1)%K;
    }
    while (N > K && Sum[0]) {
        op1(1), Sum[0]=(Sum[0]+K-1)%K;
    }
    for (int i=-0; i<K; i++) {
        if (Sum[i]) {
            printf("-1\n");
            return(0);
        }
    }

    for (int i=N-1; i>=K; i--) {
        while ((A[i+1]-A[i])%K) {op1(i-K+1);}
    }
    finish();
    printf("%d\n",Q);
    for (int i=0; i<Q; i++) {
        printf("%d %d\n",Ops[i][0], Ops[i][1]);
    }
}

Compilation message (stderr)

joiris.cpp: In function 'int main()':
joiris.cpp:73:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   73 |     scanf("%d %d",&N,&K);
      |     ~~~~~^~~~~~~~~~~~~~~
joiris.cpp:75:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   75 |         scanf("%d",&A[i]);
      |         ~~~~~^~~~~~~~~~~~

• Subtask 1: 15 / 15
• Subtask 2: 15 / 15
• Subtask 3: 15 / 15
• Subtask 4: 55 / 55