Submission #1001647
Source Code Expand
#include <cstdio> #include <iostream> #include <cstring> #include <algorithm> #include <cmath> #include <vector> #include <map> #include <set> #include <string> #include <cstdlib> #include <ctime> #include <deque> using namespace std; #define P 1000000007 int N, A, B, C; int co[5010][5010]; int dp[2511][5010][2]; int ans; void up(int &x, int y) { x = (x + y) % P; } int main() { cin >> N >> A >> B >> C; co[0][0] = 1; for (int i = 1; i <= 5000; i++) { co[i][0] = 1; for (int j = 1; j <= i; j++) co[i][j] = (co[i - 1][j] + co[i - 1][j - 1]) % P; } if (B % 2 != 0) { printf("0\n"); return 0; } dp[0][0][0] = 1; for (int i = 0; i <= N / 2; i++) for (int j = 0; j <= N; j++) { if (dp[i][j][1]) { up(dp[i][j][0], dp[i][j][1]); up(dp[i][j + 1][1], dp[i][j][1]); } if (dp[i][j][0]) { up(dp[i + 1][j][1], dp[i][j][0]); // up(dp[i + 1][j][0], dp[i][j][0]); } } // for (int i = 0; i <= N / 3; i++) for (int j = 0; j <= C; j++) if (dp[B / 2][j][0]) for (int q = 0; j + 3 * q <= C; q++) { // if ((B - 2 * i) % 2 != 0) // continue; int aa = C - j - 3 * q, bb = q, cc = A - aa; // printf("?? %d %d %d %d %d\n", i, j, aa, bb, cc); if (aa < 0 || cc < 0) continue; // printf("?? %d %d %d %d %d %d\n", i, j, aa, bb, cc, dp[i][j][0]); int tmp = dp[B / 2][j][0]; tmp = 1LL * tmp * co[B / 2 + aa][aa] % P; tmp = 1LL * tmp * co[B / 2 + aa + bb][bb] % P; tmp = 1LL * tmp * co[B / 2 + aa + bb + cc][cc] % P; // tmp = 1LL * tmp * co[i + aa + bb + cc][cc] % P; // tmp = 1LL * tmp * co[i + aa + bb + cc + q][q] % P; up(ans, tmp); } printf("%d\n", ans); }
Submission Info
Submission Time | |
---|---|
Task | J - 123 Pairs |
User | xyz111 |
Language | C++14 (Clang 3.8.0) |
Score | 1500 |
Code Size | 1718 Byte |
Status | AC |
Exec Time | 375 ms |
Memory | 165496 KB |
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 1500 / 1500 | ||||
Status |
|
|
Set Name | Test Cases |
---|---|
Sample | example0.txt, example1.txt |
All | 000.txt, 001.txt, 002.txt, 003.txt, 004.txt, 005.txt, 006.txt, 007.txt, 008.txt, 009.txt, 010.txt, 011.txt, 012.txt, 013.txt, 014.txt, 015.txt, 016.txt, 017.txt, 018.txt, 019.txt, 020.txt, 021.txt, 022.txt, 023.txt, 024.txt, 025.txt, 026.txt, 027.txt, 028.txt, 029.txt, 030.txt, 031.txt, 032.txt, 033.txt, 034.txt, 035.txt, 036.txt, 037.txt, 038.txt, 039.txt, 040.txt, 041.txt, 042.txt, 043.txt, 044.txt, 045.txt, 046.txt, 047.txt, 048.txt, 049.txt, example0.txt, example1.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
000.txt | AC | 362 ms | 165496 KB |
001.txt | AC | 353 ms | 164992 KB |
002.txt | AC | 345 ms | 164992 KB |
003.txt | AC | 347 ms | 164992 KB |
004.txt | AC | 351 ms | 164992 KB |
005.txt | AC | 347 ms | 164992 KB |
006.txt | AC | 348 ms | 164992 KB |
007.txt | AC | 347 ms | 164992 KB |
008.txt | AC | 347 ms | 164992 KB |
009.txt | AC | 346 ms | 164992 KB |
010.txt | AC | 344 ms | 164480 KB |
011.txt | AC | 343 ms | 163456 KB |
012.txt | AC | 346 ms | 164224 KB |
013.txt | AC | 95 ms | 70656 KB |
014.txt | AC | 96 ms | 70656 KB |
015.txt | AC | 347 ms | 158720 KB |
016.txt | AC | 120 ms | 79872 KB |
017.txt | AC | 193 ms | 106752 KB |
018.txt | AC | 116 ms | 78208 KB |
019.txt | AC | 222 ms | 117760 KB |
020.txt | AC | 234 ms | 124288 KB |
021.txt | AC | 360 ms | 163712 KB |
022.txt | AC | 302 ms | 149888 KB |
023.txt | AC | 348 ms | 164992 KB |
024.txt | AC | 368 ms | 164992 KB |
025.txt | AC | 350 ms | 164992 KB |
026.txt | AC | 358 ms | 164992 KB |
027.txt | AC | 362 ms | 164992 KB |
028.txt | AC | 352 ms | 164992 KB |
029.txt | AC | 356 ms | 164992 KB |
030.txt | AC | 375 ms | 164992 KB |
031.txt | AC | 364 ms | 164992 KB |
032.txt | AC | 349 ms | 164992 KB |
033.txt | AC | 87 ms | 67072 KB |
034.txt | AC | 227 ms | 119040 KB |
035.txt | AC | 317 ms | 152704 KB |
036.txt | AC | 217 ms | 117120 KB |
037.txt | AC | 88 ms | 67328 KB |
038.txt | AC | 375 ms | 164992 KB |
039.txt | AC | 87 ms | 67072 KB |
040.txt | AC | 87 ms | 67072 KB |
041.txt | AC | 352 ms | 164992 KB |
042.txt | AC | 348 ms | 164992 KB |
043.txt | AC | 87 ms | 67072 KB |
044.txt | AC | 87 ms | 67072 KB |
045.txt | AC | 87 ms | 67072 KB |
046.txt | AC | 87 ms | 67072 KB |
047.txt | AC | 87 ms | 67072 KB |
048.txt | AC | 87 ms | 67072 KB |
049.txt | AC | 87 ms | 67072 KB |
example0.txt | AC | 87 ms | 67072 KB |
example1.txt | AC | 93 ms | 69632 KB |