Submission #1797385
Source Code Expand
#define MAX_N 1000000 #define MAX_K 1000000 #define mod(x, y) ((x % y) + y) % y #define MOD 1000000007 #define modp(x) mod(x, MOD) int main(int argc, const char * argv[]) { // a[i] : 駅1から駅iまでの停まり方(駅iには必ず止まる)の総数 ll a[MAX_N]; // b[i] : 駅1から駅iまでの停まり方(駅iには止まらない)の総数 ll b[MAX_N]; int N, K; cin >> N >> K; a[1] = 1; b[1] = 0; for (int i = 1; i < K-1; i++) { a[i+1] = modp(a[i] + b[i]); b[i+1] = modp(a[i] + b[i]); } a[K] = modp(a[K-1] + b[K-1] - 1); b[K] = modp(a[K-1] + b[K-1]); for (int i = K; i < N; i++) { a[i+1] = modp((a[i] - b[i-(K-1)]) + b[i]); b[i+1] = modp((a[i] - b[i-(K-1)]) + b[i] + b[i-(K-1)]); } cout << a[N] << endl; return 0; }
Submission Info
Submission Time | |
---|---|
Task | F - 準急 |
User | habara_k |
Language | C++14 (GCC 5.4.1) |
Score | 0 |
Code Size | 874 Byte |
Status | CE |
Compile Error
./Main.cpp: In function ‘int main(int, const char**)’: ./Main.cpp:9:5: error: ‘ll’ was not declared in this scope ll a[MAX_N]; ^ ./Main.cpp:11:8: error: expected ‘;’ before ‘b’ ll b[MAX_N]; ^ ./Main.cpp:14:5: error: ‘cin’ was not declared in this scope cin >> N >> K; ^ ./Main.cpp:16:5: error: ‘a’ was not declared in this scope a[1] = 1; ^ ./Main.cpp:17:5: error: ‘b’ was not declared in this scope b[1] = 0; ^ ./Main.cpp:30:5: error: ‘cout’ was not declared in this scope cout << a[N] << endl; ^ ./Main.cpp:30:21: error: ‘endl’ was not declared in this scope cout << a[N] << endl; ^