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Submission #411909

# Submission time Handle Problem Language Result Execution time Memory
411909 2021-05-26T08:37:30 Z 조영욱(#7630) Semafor (COI20_semafor) C++17
21 / 100
 24 ms 2948 KB 
#include <bits/stdc++.h>
using namespace std;

long long n,k;
int m,x;
int bit[10]={10,2,9,7,18,21,12,3,29,23};
long long dp[1501][1024];
const int mod=1e9+7;
int sbit;

struct Matrix {
    long long arr[32][32];
};

Matrix multi(Matrix a,Matrix b) {
    Matrix ret;
    memset(ret.arr,0,sizeof(ret.arr));
    for(int i=0;i<32;i++) {
        for(int j=0;j<32;j++) {
            for(int l=0;l<32;l++) {
                ret.arr[i][j]+=a.arr[i][l]*b.arr[l][j];
                ret.arr[i][j]%=mod;
            }
        }
    }
    return ret;
}

Matrix fastpow(Matrix a,long long b) {
    if (b==1) {
        return a;
    }
    if (b%2==1) {
        return multi(fastpow(a,b-1),a);
    }
    Matrix half=fastpow(a,b/2);
    return multi(half,half);
}

int main(void) {
    scanf("%d %lld %lld %d",&m,&n,&k,&x);
    sbit=bit[x];
    Matrix mat;
    memset(mat.arr,0,sizeof(mat.arr));
    for(int i=0;i<32;i++) {
        for(int bit=0;bit<5;bit++) {
            mat.arr[i][i^(1<<bit)]=1;
        }
    }
    Matrix base0=fastpow(mat,k);
    Matrix base;
    memset(base.arr,0,sizeof(base.arr));
    for(int i=0;i<32;i++) {
        bool flag=false;
        for(int ii=0;ii<10;ii++) {
            if (bit[ii]==i) {
                flag=true;
            }
        }
        if (!flag) {
            continue;
        }
        for(int j=0;j<32;j++) {
            bool flag=false;
            for(int ii=0;ii<10;ii++) {
                if (bit[ii]==j) {
                    flag=true;
                }
            }
            if (!flag) {
                continue;
            }
            base.arr[i][j]=base0.arr[i][j];
        }
    }
    Matrix ret;
    if (n<k) {
        ret=fastpow(mat,n);
    }
    else {
        ret=fastpow(base,n/k);
        if (n%k!=0)
            ret=multi(ret,fastpow(mat,n%k));
    }
    for(int i=0;i<10;i++) {
        printf("%lld\n",ret.arr[sbit][bit[i]]);
    }
}

Compilation message

semafor.cpp: In function 'int main()':
semafor.cpp:41:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   41 |     scanf("%d %lld %lld %d",&m,&n,&k,&x);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 2 ms 332 KB Output is correct
3 Correct 2 ms 460 KB Output is correct
4 Correct 1 ms 460 KB Output is correct
5 Correct 2 ms 460 KB Output is correct
6 Correct 2 ms 496 KB Output is correct
7 Correct 2 ms 332 KB Output is correct
8 Correct 2 ms 460 KB Output is correct
9 Correct 2 ms 460 KB Output is correct
10 Correct 1 ms 460 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 2 ms 332 KB Output is correct
3 Correct 2 ms 460 KB Output is correct
4 Correct 1 ms 460 KB Output is correct
5 Correct 2 ms 460 KB Output is correct
6 Correct 2 ms 496 KB Output is correct
7 Correct 2 ms 332 KB Output is correct
8 Correct 2 ms 460 KB Output is correct
9 Correct 2 ms 460 KB Output is correct
10 Correct 1 ms 460 KB Output is correct
11 Correct 6 ms 844 KB Output is correct
12 Correct 11 ms 1228 KB Output is correct
13 Correct 17 ms 2104 KB Output is correct
14 Correct 24 ms 2816 KB Output is correct
15 Correct 23 ms 2560 KB Output is correct
16 Correct 23 ms 2716 KB Output is correct
17 Correct 21 ms 2524 KB Output is correct
18 Correct 12 ms 2508 KB Output is correct
19 Correct 13 ms 2516 KB Output is correct
20 Correct 23 ms 2764 KB Output is correct
21 Correct 15 ms 2948 KB Output is correct
22 Correct 12 ms 2508 KB Output is correct

Subtask #3
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 460 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 12.0

# Verdict Execution time Memory Grader output
1 Runtime error 6 ms 1356 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #5
0 / 15.0

# Verdict Execution time Memory Grader output
1 Runtime error 6 ms 1356 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #6
0 / 40.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 460 KB Output isn't correct
2 Halted 0 ms 0 KB -