revive/crates/integration/contracts/Computation.sol

contract Computation {
    function triangle_number(int64 n) public pure returns (int64 sum) {
        unchecked {
            for (int64 x = 1; x <= n; x++) {
                sum += x;
            }
        }
    }

    function odd_product(int32 n) public pure returns (int64) {
        unchecked {
            int64 prod = 1;
            for (int32 x = 1; x <= n; x++) {
                prod *= 2 * int64(x) - 1;
            }
            return prod;
        }
    }
}