const fs = require('fs');
const input = fs.readFileSync('./dev/stdin').toString().trim().split('\n');
input.pop();
const memo = [];
let eachInput = [];
let answer = '';
function recursive(a, b, c) {
if (a <= 0 || b <= 0 || c <= 0) {
return 1;
} else if (a > 20 || b > 20 || c > 20) {
return recursive(20, 20, 20);
} else if (memo[a][b][c]) {
return memo[a][b][c];
} else if (a < b && b < c) {
memo[a][b][c] = recursive(a, b, c - 1) + recursive(a, b - 1, c - 1) - recursive(a, b - 1, c);
return memo[a][b][c];
} else {
memo[a][b][c] =
recursive(a - 1, b, c) + recursive(a - 1, b - 1, c) + recursive(a - 1, b, c - 1) - recursive(a - 1, b - 1, c - 1);
return memo[a][b][c];
}
}
for (let i = 0; i < 21; i++) {
memo[i] = [];
for (let j = 0; j < 21; j++) {
memo[i][j] = [];
for (let k = 0; k < 21; k++) {
memo[i][j][k] = null;
}
}
}
for (let i = 0; i < input.length; i++) {
eachInput = input[i].split(' ').map(Number);
answer += `w(${eachInput[0]}, ${eachInput[1]}, ${eachInput[2]}) = ${recursive(
eachInput[0],
eachInput[1],
eachInput[2]
)}\n`;
}
console.log(answer.trim());