OJ-Problems-Source/CodeVS/1910-wasted_冰封.c

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2016-07-06 14:28:18 +08:00
/*
:
:p1910
*/
#include<stdio.h>
#include<stdlib.h>
long save[21][21][21] = {0};
long w(int a, int b, int c){
if(a < 1 || b < 1 || c < 1)
return 1;
if(save[a][b][c]) return save[a][b][c];
if(a > 20 || b > 20 || c > 20) {
return save[20][20][20] ? save[20][20][20] : w(20, 20, 20);
}
if(a < b && b < c) {
save[a][b][c] = w(a, b, c - 1) + w(a, b - 1, c - 1) + w(a, b - 1, c);
return save[a][b][c];
}
save[a][b][c] = w(a - 1, b, c) + w(a - 1, b - 1, c) + w(a - 1, b, c - 1) - w(a - 1, b - 1, c - 1);
return save[a][b][c];
}
int main(int argc, char* argv[]){
int a, b, c;
while(1){
scanf("%i%i%i", &a, &b, &c);
if(a == -1 && b == -1 && c == -1) break;
printf("w(%i, %i, %i) = %li\n", a, b, c, w(a, b, c));
}
return 0;
}